$49 Find Deals on Flights from Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Anywhere departing on 3/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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Find Cheap Flights from Ontario

Where can I fly from Ontario?Prices from ONT, departing Wed 4/2 and returning Wed 4/9

Flights from Ontario - Travel Insights & Trends

Get data-powered insights and trends into flights from Ontario to help you find the cheapest flights, the best time to fly and much more.

Which are the most popular places to fly to from Ontario?

The domestic destinations KAYAK users have most searched for when searching for flights from Ontario.
Based on KAYAK flight searches, the most popular place to fly from Ontario is New York (11% of total searches). The next most popular destinations are Seattle/Tacoma Intl (6%) and San Francisco (6%).

What are the most popular international flights out of Ontario?

The international destinations KAYAK users have most searched for when searching for flights from Ontario.
There are many international destinations you can fly to from Ontario. The most popular international destinations among KAYAK users are Manila, Guadalajara and Paris.

What are the most popular countries to fly to from Ontario?

The most popular countries KAYAK users have searched for from Ontario along with the average round-trip price for the route clicked by KAYAK users in the last 2 weeks.
Based on KAYAK flight searches, the most popular country to fly to from Ontario is Mexico (23% of total searches). The next most popular destinations are Taiwan (62%) and El Salvador (16%).

Which cities can I fly to direct from Ontario?

There are loads of places you can fly direct to from Ontario. The most popular destinations for direct flights among KAYAK users are Chicago, Phoenix, Portland, Honolulu and Charlotte. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was Chicago at $158, while the most expensive was Honolulu, at $234.

Which international cities can I fly to direct from Ontario?

There are many international destinations you can fly to non-stop from Ontario. The most popular international destinations from KAYAK users are Taipei City, Guadalajara and San Salvador. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was Guadalajara at $172, while the most expensive was Taipei City, at $596.

What is the longest direct flight from Ontario?

The longest direct flight you can take from Ontario is to Taipei City Taiwan Taoyuan Intl Airport, with a duration of 14h 45m. The next longest is Honolulu at 6h 10m, followed by a flight to New York at 5h 20m.

Good to know

Low season

February

High season

March

Cheapest flight

$49
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 6% increase in price.
Flight from Ontario to Las Vegas

Flights from Ontario: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew from Ontario to anywhere 
LeoFlew with American AirlinesONT-CLTSep 2024
Have plenty of patience for the casual travelers! They are oblivious of rules and etiquettes that slows down the process for everyone. Case in point, a guy held up the line trying to place both his personal item (should be UNDER the seat in front of you) and his carry on case horizontally. Obviously not aware of the big poster right in front of his displaying the proper way of placing his case on it's side. Slowed the whole line of people behind him. Also be mindful the agents in Ontario airport (or any smaller airports) might not be the most knowledgeable on the rules and regulations of air travel, luggage specification allowances etc. Stay patient!! Also the seats do not recline that well anymore on AA flights. So if you have back problems, be sure to bring some back supports.
Verified travelerFlew with Hawaiian AirlinesONT-HNLJul 2024
TSA was super fast. Easy airport to navigate.
ShonelleFlew with FrontierONT-DENAug 2024
Don't choose Frontiet Airlines as your flight provider.
WILLIAMFlew with American AirlinesONT-DFWMar 2024
Check in counter is small, limited staffs for early flights. Also, limited Kiosk stations as well.
MariFlew with American AirlinesONT-CLTJan 2024
Bring a blanket it's very cold on plane

FAQs for booking flights out of Ontario

  • Do flights from Ontario via Ontario International Airport (ONT) consider persons with reduced mobility?

    Special needs passengers, such as those with restricted mobility or impaired vision, will find it easier to fly from Ontario via ONT. To assist these passengers, all airlines have workers stationed throughout the airport. Anyone who requires special airport services should make their request while making their travel arrangements.

  • Can I park my car at Ontario International Airport?

    Different types of parking indicate the probability of parking your car at the airport. If you've arrived at the airport and have a to-and-fro flight from Ontario, consider parking your car at private, public, or valet parking lots with a surcharge both for short and long parking.

  • Are there nursing rooms at Ontario International Airport?

    Lactating mothers are much considered on flights from Ontario via ONT, for it features two nursing rooms for them. One of these nursing rooms is situated in Terminal 2 on the second floor past the TSA screening across from gate 204, next to the women's restroom. The other one is at Terminal 4 on the second floor across from gate 407, next to the family restroom.

  • Which airlines have lounges at Ontario International Airport in Ontario?

    Consider using the Aspire Lounge in Terminal 2, open to guests traveling with United, Alaska, Frontier, and Delta airlines. The lounge provides unparalleled airfield views, excellent food, and comfortable seating to work or relax.

  • What is Ontario also known as?

    Ontario Airport’s airport code is ONT. It can also be referred to as Ontario, Ontario Intl.

  • How does KAYAK find such low prices on flights from Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to your destination with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight out of Ontario

  • Looking for a cheap flight? 25% of our users found tickets from Ontario to the following destinations at these prices or less: Denver $99 one-way - $131 round-trip; Dallas $172 one-way - $295 round-trip; Las Vegas $49 one-way - $76 round-trip
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be January, November and December. The cheapest month to fly from Ontario is September.
  • Morning departure is around 5% more expensive than an evening flight, on average*.
  • Flights from Ontario depart from Ontario International Airport (ONT). Most passengers use Ontario International Airport from Ontario to Mexico and Las Vegas.
  • It would take you approximately 5 minutes to cover the 3 miles connecting the Ontario city center to Ontario International Airport. If you are in a hurry, consider using a private means of transport such as a taxi, Uber, or car rental. A bus or a train is an alternative means of transport if you are not in a hurry to catch your flight.
  • Travelers with the earliest flight from the airport should consider staying in one of the hotels close to it. For instance, you can book a room at Holiday Inn Ontario Airport. This hotel is a 3-minute walk to ONT and provides a complimentary airport shuttle to its guests who are connecting to the airport for a flight and have pieces of luggage.
  • Never leave your pet behind if you have a flight from Ontario through Ontario International Airport. The airport considers animals by building several pet relief areas inside and outside. These areas are close to gates 210 in Terminal 2 and 410 in Terminal 4. The outside pet relief area is located at the end of the terminal building.
  • Everyone understands how stressful it is to travel with children on long vacations. JetBlue Airlines is a good option if you are flying with children from Ontario. This airline provides kid-friendly amenities such as video games, subscribed cartoon channels, plane toys, and free refreshments to keep kids entertained during the flight. This airline's planes boast big, pleasant seats with ample legroom, making it ideal for parents with children on their laps.
See more tips
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from Ontario to Anywhere

Need help choosing which airline to fly with from Ontario to Anywhere? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.2
China AirlinesOverall score based on 721 reviews
8.0Comfort
8.5Crew
7.8Food
8.0Entertainment
8.3Boarding
Airline reviews

Not great, will likely try to fly another or maybe I should have upgraded my ticket? Needed Air…

4.0 OkayBen, Mar 2025TPE - BKK
Read more China Airlines reviews

Not great, will likely try to fly another or maybe I should have upgraded my ticket? Needed Air…

I don’t think I’ll be flying them again. Tight seats, no flowing air or air nozzles that you can turn air on you, for those who could have motion sickness this would be your worst nightmare. The pilot was great and experienced (which is what you want when flying 12 hours) overall I’m thankful knowledgeable pilots!

My ticket did not indication which group I was in for boarding; the gate attended help me

Very routh cabin crew food is only 2 meals for 13 hours fry with them They should get better training how to service good super routh language and talking with customer

I would like to commend the staff from this flight. They all looked happy and I can tell they love what they are doing and constantly smiling while serving the passengers. Special mention to the guy FA in our section. I did not get his name but he is so far the best F.A I have ever encountered!

staff are super nice and effiecient! It was a very comfortable and relaxing flight

Boarding could have been a little bit better but other than that it was a pretty good experience. I think because of the stowaway to Paris France recently they are being extra diligent about boarding passes at the gate. But they boarded the back of the plane first, and that's something I really think needs to start in the USA.

I was ordered vegetarian food, but didn't services to me :(

I did not take the flight, tried to cancel it right after I booked it, but was unable to reach anyone. I blame Kayak for this situation because they sent the booking through another company and I was unable to get anyone to talk to me about the situation. I had to just take the hit and pay for another flight through Cathay Pacific, which was wonderful. I will never use Kayak again. (I bet they don’t post this review!) I’ll just post about them on social media sites. I don’t want anyone to have to go through the hassle and expense I dealt with.

Unable to set seat assignment. Got a call from presumably “China airlines representative” but was asking for an exorbitant amount for the seat assignment. Was traveling as a family end up being assigned to different seats as a result. Will never use underpricer again.

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

New boarding doesn't make sense. Filling front first is slow.

Delta flight was great from the check in all the way to arrival. However, I had a very bad experience. I requested a wheelchair and the wheelchair employee that went to pick me up from the plane in Boston to bring me to the baggage claims told me I have to pay him. I was under the impression that it was a free service and I usually give tips but the person forced me to pay and since I said no because I was upset with his demand when my daughter walked in to pick me up he demanded payment from my daughter who paid him thinking maybe now it is a charged service.

Horrible. Grateful to be alive but spent 13 hours at airport only to return back to my familys house and flight changed to next day. They tried to fix a part on plane, had no back up plane and after 10 hours , reattempted the flight and it STILL wasn't fixed. We got a meal voucher and rescheduled flight but there should be some other compensation for the 15 hours spent in airport

My seat was changed at the last minute and I was moved to the last row, right next to the bathroom despite selecting my seat well in advance. I was also made to check my carry on due to space but when I got on the plane there was significant empty overhead space. Picking up my carry on from the luggage carousel added time to my trip which had already been extended due to delay.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.

Plenty of room for me and the cat in Premium Economy. Seat was comfortable. Boarding was a breeze. The lady at the special check-in desk was great, super helpful and professional.

Smooth flight. As always dinner could have been more generous. Breakfast was great.

AWFUL. I have had the experience of traveling with many airlines across the world, and hands down United Airlines is the worst. Not one flight was on time, and I don’t think I met one crew member or staff member who wasn’t rude.

Old and out of date plane, it seem like every time I fly with united there’s and issue. We were delayed,

We took off an hour late due to arrival airport not having enough gates. That was followed by 1:30 wait to get our bags delivered for the entire flight.

For an 8.5 hour flight the service on board lacked a bit. Service start was slow, the food was worse than usual and they skipped the snack they were supposed to deliver before landing.

Wish movie and music choices changed more often. Mostly same from a month or two ago when I last flew.

It was good. Just that the seats could not be reclined. The people behind were not ready to let the chairs be reclined

Checkin was painful and slow! Lady didn’t seem to know what was going on and couldn’t explain the delay. Seemed ahe couldnt see the computer scree and we couldn’t hear her talk through her mask.

Awkward carry on process. Forced to check all carry on. No overhead space of worthiness. Left delayed, but made up the time. Crew was amicable.

Amazingly comfy flight - I had upgraded for a reasonable price and it was worth it. The food also was good.

Had to wait on pilot and crew to depart and had to wait to arrive at the gate because they only had 2 crews working. Delays, delays....Planes just keep getting smaller and tighter and they nickle and dime for everything. When will an airline actually wake up and make flying more enjoyable?

I paid for what I got which was cheap, I brought my own entertainment. I knew what to expect, so I could be prepared. If you’re flying economy, check in early like me. I have no problems with my flight, was on time, staff were friendly, and overall good experience.

DO NOT BOOK THROUGH AMERICAN AIRLINES IF YOU HAVE ANY ADDITIONAL NEEDS. Great flight, crew etc. it wasn’t full so had space to stretch out Only downside was there was no GF option for my partner. We booked through American and it was a Qantas flight so despite contacting both airlines to confirm, she didn’t have a gluten free meal for the 16 hour flight (nor the flight in the other direction). The flight attendants did their best to accommodate but it was not super substantial.

After several delays and being rebooked onto a layer flight, I had to speak to three AA agents for baggage claim to get an attendant. All were in foul mode and reluctant to assist or offer any assistance.

Multiple maintenance delays and the missed and rebooked connection changed gates at least 6 times including one which had us walking 20 minutes to another terminal and then back again. Seated our family of three in different middle seats throughout the plane and then there was an empty seat next to me. Very long travel day which I would have never agreed to if I knew the itinerary would be changed at 5 am, 2 hours before takeoff.

It was as expected for such a short flight. No complaints

It was nice being on a flight that had working wifi. The boarding was quick - why don’t all airlines have small boarding groups window to aisle? Makes so much sense!!! I was disappointed to be the first person stopped to have to gate check my carryon. Especially when there was plenty of overhead space at the back! But I get it…keeps it moving. Crew was nice.

The flight encountered a delay exceeding 4 hours. The food voucher issued was valued at $12, insufficient to cover our meal expenses. Consequently, I was unable to take my medication, leading to a drop in blood sugar levels and exacerbating my anxiety.

Early arrival. Great landing. Pilot updates. Too cold in plane.

Better to put road truck seat in plain it so uncomfortable can not adjustable and fill metal don’t have cushions at all it’s very hard to travel for five hours

Since they are a budget airline, I wasn’t expecting too much but they did some things well. They were on time, the plane was clean, boarding was fairly straightforward and the staff was cheerful and friendly. The only downside was comfort. The seats were fairly hard and after a 2 hour flight your rear end is not feeling so great. Maybe a little more cushion in the seats, Frontier!

They cancelled the flight and did nothing. I should be compensated for my uber rides to and from airport. Not a good service by frontier or kayak.

No frills for sure. No gate announcements about flight delay, not even water to drink on the flight.

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

It was a redeye flight, so every passenger just wanted to sleep, but through the entire flight, the flight crew made announcements over the loudspeaker at maximum volume every few minutes making sleep impossible. For example: it’s 2am, and the crew decides to give an extremely detailed announcement about snacks and beverages for sale. And 3am is the perfect time to wake up everyone with a lengthy announcement about how to get a coffee refill and how to take advantage of new offer from frontier for a credit card.

The takeoff was the smoothest I've ever experienced on any airline and this is the first time I've flown on frontier so this was an extremely pleasant surprise!

A lady asked to stop the flight after the tunnel pulled away and we began to depart a flight that was already hours late. The attendance respectfully stopped the the plane and had the tunnel return. After the tunnel returned the passenger claimed to have changed her mind . The tunnel was then put in reverse and the passenger remained on the plane .. They should have sent the sick passenger off the plane like initially replaced. They existed a couple off the plane prior to that situation.. So.. all and all.. it was a long and flight.. .

With frontier you get what you pay for. The flight was two hours late. It’s a tight fit for the number of people they bring but you get to where you’re going cheap. Sometimes that’s more important than a nifty drink and cool TV..

Book cheap domestic flights from Ontario

Recent round-trip flight deals

3/24Mon
nonstopFrontier
1h 36mONT-SFO
4/6Sun
nonstopFrontier
1h 28mSFO-ONT
$57
5/2Fri
nonstopFrontier
1h 38mONT-SFO
5/4Sun
nonstopFrontier
1h 28mSFO-ONT
$58
3/26Wed
nonstopUnited Airlines
1h 29mONT-SFO
4/1Tue
nonstopUnited Airlines
1h 26mSFO-ONT
$92
5/8Thu
nonstopSouthwest
2h 10mONT-DEN
5/12Mon
nonstopSouthwest
2h 20mDEN-ONT
$97
4/1Tue
1 stopSouthwest
4h 05mONT-LAS
4/7Mon
nonstopSouthwest
1h 05mLAS-ONT
$107
4/5Sat
nonstopUnited Airlines
1h 44mONT-SFO
4/7Mon
nonstopUnited Airlines
1h 31mSFO-ONT
$117
4/22Tue
nonstopDelta
2h 55mONT-SEA
4/26Sat
nonstopDelta
2h 40mSEA-ONT
$187
4/8Tue
1 stopAmerican Airlines
3h 10mONT-LAS
4/9Wed
1 stopAmerican Airlines
4h 55mLAS-ONT
$197
5/2Fri
nonstopDelta
2h 50mONT-SEA
5/8Thu
nonstopDelta
2h 44mSEA-ONT
$197
4/4Fri
1 stopAmerican Airlines
4h 33mONT-SFO
4/7Mon
1 stopAmerican Airlines
6h 04mSFO-ONT
$198

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Recent one-way flight deals

3/29Sat
nonstopFrontier
1h 13mONT-LAS
$38
5/20Tue
nonstopFrontier
2h 18mONT-DEN
$38
3/9Sun
nonstopUnited Airlines
1h 29mONT-SFO
$39
4/3Thu
nonstopSouthwest
2h 15mONT-DEN
$49
6/3Tue
2 stopsSouthwest
5h 15mONT-LAS
$64
4/3Thu
nonstopUnited Airlines
2h 19mONT-DEN
$79
4/30Wed
1 stopAmerican Airlines
3h 10mONT-LAS
$99
4/6Sun
1 stopAmerican Airlines
6h 00mONT-LAS
$100
5/4Sun
1 stopDelta
8h 05mONT-DEN
$109
4/26Sat
1 stopDelta
9h 49mONT-IAH
$119

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Last minute flights from Ontario to Anywhere

Last minute flight, train and bus deals

3/8Sat
nonstopFrontier
1h 13mONT-LAS
3/12Wed
nonstopFrontier
1h 11mLAS-ONT
$95
3/6Thu
nonstopFrontier
1h 36mONT-SFO
3/9Sun
nonstopFrontier
1h 28mSFO-ONT
$96
3/5Wed
nonstopUnited Airlines
1h 29mONT-SFO
3/12Wed
nonstopUnited Airlines
1h 30mSFO-ONT
$157
3/8Sat
nonstopUnited Airlines
1h 42mONT-SFO
3/10Mon
nonstopUnited Airlines
1h 25mSFO-ONT
$163
3/6Thu
multi-stopSouthwest
6h 35mONT-SFO
3/13Thu
multi-stopSouthwest
5h 00mSFO-ONT
$182
3/6Thu
multi-stopSouthwest
4h 20mONT-SFO
3/8Sat
multi-stopSouthwest
5h 20mSFO-ONT
$197
3/6Thu
multi-stopAmerican Airlines
6h 01mONT-SFO
3/8Sat
multi-stopAmerican Airlines
6h 32mSFO-ONT
$199
3/6Thu
multi-stopAmerican Airlines
6h 01mONT-SFO
3/9Sun
multi-stopAmerican Airlines
6h 03mSFO-ONT
$228
3/8Sat
nonstopDelta
2h 55mONT-SEA
3/29Sat
nonstopDelta
2h 47mSEA-ONT
$322
3/8Sat
multi-stopDelta
6h 25mONT-SEA
3/29Sat
nonstopDelta
2h 42mSEA-ONT
$332

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Book cheap international flights from Ontario

Recent round-trip flight deals

4/9Wed
multi-stopVolaris
11h 17mONT-CUN
4/13Sun
multi-stopVolaris
13h 32mCUN-ONT
$320
4/1Tue
multi-stopVolaris
11h 17mONT-CUN
4/12Sat
multi-stopVolaris
13h 32mCUN-ONT
$325
4/1Tue
multi-stopFrontier
11h 52mONT-CUN
4/9Wed
multi-stopFrontier
10h 53mCUN-ONT
$352
5/1Thu
multi-stopFrontier
13h 11mONT-CUN
5/5Mon
multi-stopFrontier
22h 11mCUN-ONT
$362
5/1Thu
multi-stopAmerican Airlines
14h 56mONT-CUN
5/6Tue
multi-stopAmerican Airlines
16h 08mCUN-ONT
$438
5/1Thu
multi-stopAmerican Airlines
14h 56mONT-CUN
5/6Tue
multi-stopAmerican Airlines
12h 33mCUN-ONT
$442
3/25Tue
multi-stopUnited Airlines
19h 35mONT-MAD
4/1Tue
multi-stopUnited Airlines
19h 43mMAD-ONT
$734
4/29Tue
multi-stopUnited Airlines
26h 50mONT-DEL
5/6Tue
multi-stopUnited Airlines
27h 20mDEL-ONT
$867
3/31Mon
multi-stopDelta
28h 40mONT-DEL
4/6Sun
multi-stopDelta
34h 04mDEL-ONT
$924
4/30Wed
multi-stopDelta
17h 35mONT-MAD
5/16Fri
multi-stopDelta
21h 22mMAD-ONT
$1,029

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Recent one-way flight deals

4/10Thu
multi-stopFrontier
10h 29mONT-CUN
$155
3/29Sat
multi-stopFrontier
10h 58mONT-CUN
$157
3/19Wed
multi-stopAmerican Airlines
11h 33mONT-CUN
$219
4/8Tue
multi-stopAlaska Airlines
22h 15mONT-CUN
$228
7/28Mon
multi-stopAmerican Airlines
8h 07mONT-CUN
$229
5/10Sat
multi-stopAlaska Airlines
21h 50mONT-CUN
$233
4/30Wed
multi-stopUnited Airlines
11h 10mONT-CUN
$264
5/24Sat
multi-stopUnited Airlines
24h 36mONT-CUN
$277
5/9Fri
multi-stopDelta
45h 00mONT-DEL
$485
5/16Fri
multi-stopDelta
64h 30mONT-DEL
$497

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Everything you need to know for your flight from Ontario

Information on your arrival and departure airports

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