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ONT - BWI

$74 Find cheap flights from Ontario to Baltimore

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 Baltimore departing on 6/17. 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.
1 adult
0 bags
Wed 7/10
Wed 7/17

Search hundreds of travel sites at once for deals on flights to Baltimore

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Baltimore, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Baltimore, as well as popular online travel agencies
In the last 7 days travelers have searched 42,898,604 times on KAYAK, and here is why:

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Cheap flight deals from Ontario to Baltimore (ONT-BWI)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Baltimore that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
8:17 am - 12:36 pmONT-BWI
25h 19m1 stop
8:54 pm - 7:17 amBWI-ONT
13h 23m1 stop
$156Frontier
Find Deal
Wed, Jul 10 - Tue, Jul 23
12:49 am - 12:36 pmONT-BWI
8h 47m1 stop
8:54 pm - 11:39 pmBWI-ONT
29h 45m1 stop
$176Frontier
Find Deal
Wed, Jul 31 - Tue, Aug 6
6:40 am - 9:42 pmONT-BWI
12h 02m2 stops
3:39 pm - 8:45 pmBWI-ONT
8h 06m1 stop
$362American Airlines
Find Deal
Tue, Aug 27 - Mon, Sep 9
11:59 pm - 12:44 pmONT-BWI
9h 45m1 stop
6:00 am - 4:08 pmBWI-ONT
13h 08m2 stops
$377American Airlines
Find Deal
Sun, Aug 18 - Sat, Aug 31
4:28 pm - 5:37 amONT-BWI
10h 09m1 stop
7:08 am - 3:33 pmBWI-ONT
11h 25m1 stop
$416Alaska Airlines
Find Deal
Wed, Aug 28 - Wed, Sep 4
4:28 pm - 5:37 amONT-BWI
10h 09m1 stop
7:08 am - 10:15 pmBWI-ONT
18h 07m2 stops
$424Alaska Airlines
Find Deal
Tue, Sep 17 - Tue, Sep 24
5:00 pm - 5:47 amONT-BWI
9h 47m1 stop
7:03 am - 12:15 pmBWI-ONT
8h 12m1 stop
$426Delta
Find Deal
Thu, Jul 18 - Thu, Aug 8
6:59 pm - 8:45 amONT-BWI
10h 46m2 stops
7:03 am - 12:15 pmBWI-ONT
8h 12m1 stop
$431Delta
Find Deal
Thu, Jul 18 - Thu, Aug 8
6:00 am - 4:03 pmONT-BWI
7h 03m1 stop
4:59 pm - 9:11 pmBWI-ONT
7h 12m1 stop
$476United Airlines
Find Deal
Thu, Aug 8 - Mon, Aug 12
6:25 pm - 5:20 amONT-BWI
7h 55m1 stop
7:05 am - 12:15 pmBWI-ONT
8h 10m1 stop
$496United Airlines
Find Deal
Wed, Jul 10 - Wed, Jul 17

Flights from Ontario to Baltimore - Travel Insights & Trends

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

What’s the cheapest day of the week to fly from Ontario to Baltimore?

The average price of all flights from Ontario to Baltimore clicked on KAYAK for each day over the last 12 months.
For Ontario to Baltimore, Friday is the cheapest day to fly on average and Monday is the most expensive. Flying from Baltimore back to Ontario, the best deals are generally found on Wednesday, with Sunday being the most expensive.

What is the cheapest month to fly from Ontario to Baltimore?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Ontario to Baltimore, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Ontario to Baltimore is September, where tickets cost $233 on average. On the other hand, the most expensive months are December and June, where the average cost of tickets is $405 and $364 respectively.

How far in advance should I book a flight from Ontario to Baltimore?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Ontario to Baltimore, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Ontario to Baltimore, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 33 days before departure.

Which airlines provide the cheapest flights from Ontario to Baltimore?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Ontario to Baltimore found on KAYAK was with Frontier for $74. Frontier proposed a round-trip connection from $156 and American Airlines from $362.

Good to know

Low season

March

High season

June

Cheapest flight

$74
Best time to beat the crowds but there is an average 24% increase in price.
Most popular time to fly with an average 44% increase in price.
Flight from Ontario to Baltimore

When to book flights from Ontario to Baltimore

Are your dates flexible? Find out the best times to travel from Ontario to Baltimore based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Baltimore

  • What is the cheapest flight from Ontario to Baltimore?

    In the last 3 days, the lowest price for a flight from Ontario to Baltimore was $74 for a one-way ticket and $156 for a round-trip.

  • Do I need a passport to fly between Ontario and Baltimore?

    No, a passport isn't needed to fly from Ontario to Baltimore. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Ontario to Baltimore?

    Ontario airport is called Ontario and the only airport in Baltimore is Baltimore/Washington.

  • Which aircraft models fly most regularly from Ontario to Baltimore?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Baltimore?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Ontario and Baltimore, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to Baltimore, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Baltimore are Delta and United Airlines. With an average price for the route of $500 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $680 and an overall rating of 7.4.

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

    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 to Baltimore.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Baltimore 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 to Baltimore?

    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 Baltimore with an airline and back to Ontario with another airline. Booking your flights between Ontario and BWI can sometimes prove cheaper using this method.

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

    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 to Baltimore 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 5 airlines serving from Ontario to Baltimore

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Baltimore. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Baltimore? 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.
8.0
DeltaOverall score based on 10295 reviews
7.9Comfort
8.0Entertainment
8.2Boarding
8.6Crew
7.4Food
Airline reviews

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.

4.0 OkayBrooke, Jun 2024SFO - MSP
Read more about Delta reviews

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!

There was a loud squeaky sound the whole time we were flying.

Service was good for such a short flight. Small plane but smooth flight.

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

I had a great flight. Everything went smoothly and the flight arrived early.

On time take off…US cabins look tired and need of refresh!

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

Due to one crew member not showing up to work, our flight was significantly delayed causing us to miss our connecting flight in Houston to Mississippi causing us to be delayed by more than 6 hours and missing our event all together. Very disappointing. All because ONE crew member called in sick. United did grant us a $15 meal voucher, which was a small but appreciated concession that I wasn’t able to use because I ordered my lunch and paid for it before applying the concession, and the staff said it was too late to use it. Ugh! We also had a TWO delay coming back from Mississippi, but that was on American Airlines and it was due to weather, so not their fault. Anyway, not at all impressed with United’s handling of our flight and the HUGE disappointment of missing our important family event for our 90 year old mother. All that money and all that stress and emotions for nothing. Having to wait the hour to bring an employee from LAX seemed like something that should not have happened. Why don’t you have a local back-up? Santa Ana is not a little airport in a rural area.

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.

The flight was delayed several times without explanation. The seats were terribly uncomfortable and wifi isn’t included. All these make for a less than ideal flight.

Internet service was erratic. Crew service was poor and slow. My luggage on this non-stop flight was lost and not recovered

Flight was 1/2 hour delayed leaving Phoenix. Otherwise it was an average flight. Flight crew on this trip was very nice.

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Comfort of seats, ease of boarding. Food selection could be better

Food options were limited which is absolutely embarrassing for a Flight of this size The staff did not come around as much and I am not accustomed to such poor service from American Airlines Drinks I believe were limited to soda and water

Crew were attentive and friendly. Flight was smooth and early! I enjoyed the less crowded plane. Thank you!

We are gluten free, there were not any available complimentary gluten free options.

No meal on a cross country flight? SFO-MiA is pretty much the definition of a coast to coast flight. No meal provided. Sky high wi-fi rates too. Stop nickel and diming your customers.

Flight was canceled less than 6 hours before takeoff, rebooked on a flight that was twice as long and left earlier so we couldn’t make it, when using text support option took over 2 hours to speak with someone.

Terrible legroom, seats do not recline, tray table the size of an iPhone, delayed flight, have to pay 5$ to get a cup of water onboard.

I got a one-way, last-minute nonstop flight from PDX to BWI for only $125. Yes, I got nicked $79 more for a checked suitcase and $89 more for the BIG SEAT option, but it was worth it, even with $4.50 for coffee and $10 for a snack (the latter no different than any other airline). The grand total was still less flying on any other airline.

The crew was the best and very accommodating I know you don't offer any complimentary items but water and coffee will not break the bank !!

My mother was HARASSED AND ACCOSTED by the gate agent for her bag. I pre purchased the bag fee and the gate agent made my 78 year old mother board, deplane, re pay for her bag fee and board again. The gate agent made my mother pick up her own bag and REFUSED to help her, she is an older woman who wasn’t bothering anyone on a flight that had maybe 30’total passengers. I am going to sue this airlines for their HORRIBLE customer service and treatment of my mother, and all this occurred the day after Mother’s Day!!!

Horrible, first flight delayed. They switched my connecting flight while I was en route and even though I was originally supposed to be on the flight going back home to boston, refused to let me board and told me I would have to wait for next flight that was 14 hours later. Ended up renting a car and driving 6.5 hours back home. Still getting messages about flight and it is now showing that the other flight they put me on is now canceled and I would have to wait 24 hours for the next one. I will never book with spirit again

They stuck us with multiple extra fees. I will never fly spirit again

Overall it was a miserable experience... I will never fly spirit for more than a 3 hour flight or overnight.

They seemingly have no respect for their customers, on any level. Avoid flying spirit, they will bump you to another flight without thinking twice so they can sell your seat, no joke.

Kayak does not know that spirit airlines charged me $70 to fly. But the bag check-in was $89 each way. This is false advertising to lure people. Spirit airlines sends bunch of emails after flight purchases to buy wifi, better seats, priority boarding, secure reserved seats. This is false advertising. Up front pricing. I would of flown jet blue or Alaska airlines.

I strongly dislike Frontier. I find them barebones, the seats not particularly comfortable, the nickel and diming is maddening, the app is TERRIBLE - super confusing to navigate, and the last 4 frontier flights I have flown have been on AVERAGE 2 hours late, one ruining a fancy night out in Vegas with reservations made well in advance, which was nodded to with a measly 5000 miles, which translates to almost nothing. At least credit a free checked bag or something.

8 hr delay. had to buy another ticket with another airline

I appreciated the upgrade to free cary-on bag and seat selection at no charge

Flight was delay 9hrs and nothing was provided at airport, had to go and get a room to sleep in, paid for Uber back and fort with no offers until we landed back home a 1hr later for a $75 voucher for a future flight.

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

Terrible. Seats are bad and the baggage policy is inconsistent

Book cheap flights from Ontario to Baltimore

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Ontario to Baltimore found on KAYAK in the last 72 hours.
6/17Mon
1 stopFrontier
19h 09mONT-BWI
$74
7/22Mon
1 stopFrontier
16h 02mONT-BWI
$82
8/28Wed
1 stopAmerican Airlines
8h 08mONT-BWI
$187
10/21Mon
1 stopDelta
9h 47mONT-BWI
$188
8/11Sun
2 stopsAmerican Airlines
10h 18mONT-BWI
$193
7/4Thu
1 stopDelta
7h 04mONT-BWI
$194
7/11Thu
1 stopAlaska Airlines
10h 24mONT-BWI
$228
9/28Sat
1 stopUnited Airlines
6h 30mONT-BWI
$234
8/28Wed
2 stopsAlaska Airlines
15h 07mONT-BWI
$236
7/28Sun
1 stopUnited Airlines
7h 55mONT-BWI
$237

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Last minute flights from Ontario to Baltimore

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Ontario to Baltimore that are departing in the next 10 days.
6/15Sat
multi-stopFrontier
14h 07mONT-BWI
6/19Wed
multi-stopFrontier
22h 00mBWI-ONT
$288
6/12Wed
multi-stopFrontier
8h 50mONT-BWI
6/15Sat
multi-stopFrontier
9h 12mBWI-ONT
$358
6/13Thu
multi-stop
10h 24mONT-BWI
6/20Thu
multi-stop
9h 18mBWI-ONT
$677
6/13Thu
multi-stop
10h 24mONT-BWI
6/20Thu
multi-stop
12h 59mBWI-ONT
$678
6/15Sat
multi-stopUnited Airlines
6h 57mONT-BWI
6/17Mon
multi-stopUnited Airlines
12h 13mBWI-ONT
$830
6/14Fri
multi-stopUnited Airlines
7h 45mONT-BWI
6/17Mon
multi-stopUnited Airlines
22h 01mBWI-ONT
$887
6/13Thu
multi-stopDelta
13h 13mONT-BWI
6/16Sun
multi-stopDelta
8h 07mBWI-ONT
$891
6/14Fri
multi-stopDelta
12h 39mONT-BWI
6/17Mon
multi-stopDelta
9h 29mBWI-ONT
$896
6/15Sat
multi-stopAmerican Airlines
9h 41mONT-BWI
6/16Sun
multi-stopAmerican Airlines
8h 53mBWI-ONT
$906
6/12Wed
multi-stopAmerican Airlines
7h 38mONT-BWI
6/18Tue
multi-stopAmerican Airlines
11h 12mBWI-ONT
$911

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Ontario - Baltimore Flights

Departure:

Ontario (ONT)United States

Destination:

Baltimore (BWI)United States

Return flight deals:

Baltimore - Ontario

Cabin classes: