BOS - ONT

$87 Find Cheap Flights from Boston to 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 Boston to Ontario departing on 12/16. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Ontario, 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 Boston to Ontario, as well as popular online travel agencies
In the last 7 days travelers have searched 47,946,175 times on KAYAK, and here is why:

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Cheap Flight Deals from Boston to Ontario (BOS-ONT)

 
These are the cheapest deals for flights from Boston to Ontario currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Boston to Ontario

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Boston to Ontario.

Recent one-way flight deals from Boston to Ontario

Only flying one-way? Below are some of the best one-way flight deals from Boston to Ontario found on KAYAK recently.

Recent last minute flight deals from Boston to Ontario

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Boston to Ontario.

Recent direct flight deals from Boston to Ontario

The latest deals for direct flights from Boston to Ontario so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Boston to Ontario

Find recent round-trip train or bus tickets from Boston to Ontario.

All round-trip flight deals to Ontario

The cheapest plane tickets to Ontario found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
5:40 pm - 11:53 pmBOS-ONT
9h 13m1 stop
6:00 am - 4:23 pmONT-BOS
7h 23m1 stop
$308Delta
Find Deal
qua, jan 8 - ter, jan 14
10:57 am - 8:29 pmBOS-ONT
12h 32m2 stops
6:15 am - 5:11 pmONT-BOS
7h 56m1 stop
$313United Airlines
Find Deal
seg, jan 13 - qui, jan 30
7:00 am - 3:11 pmBOS-ONT
11h 11m1 stop
6:00 am - 11:59 pmONT-BOS
14h 59m1 stop
$315Alaska Airlines
Find Deal
seg, fev 3 - qua, fev 26
11:35 am - 8:29 pmBOS-ONT
11h 54m2 stops
10:47 am - 11:59 pmONT-BOS
10h 12m2 stops
$318United Airlines
Find Deal
seg, jan 13 - qui, jan 30
6:59 pm - 10:34 amBOS-ONT
18h 35m1 stop
6:00 am - 11:59 pmONT-BOS
14h 59m1 stop
$323Alaska Airlines
Find Deal
seg, fev 10 - seg, fev 17
4:58 pm - 10:03 pmBOS-ONT
8h 05m1 stop
11:59 pm - 11:40 amONT-BOS
8h 41m1 stop
$327American Airlines
Find Deal
sex, dez 13 - dom, jan 12
4:58 pm - 10:03 pmBOS-ONT
8h 05m1 stop
7:30 pm - 8:15 amONT-BOS
9h 45m2 stops
$332American Airlines
Find Deal
sex, dez 13 - dom, jan 12
10:45 am - 7:00 pmBOS-ONT
11h 15m2 stops
11:15 am - 9:40 pmONT-BOS
7h 25m1 stop
$333Southwest
Find Deal
sex, jan 10 - seg, jan 13
1:25 pm - 8:45 pmBOS-ONT
10h 20m2 stops
9:20 am - 10:30 pmONT-BOS
10h 10m2 stops
$338Southwest
Find Deal
sex, jan 10 - seg, jan 13
5:40 pm - 11:53 pmBOS-ONT
9h 13m1 stop
11:29 am - 11:55 pmONT-BOS
9h 26m1 stop
$366Delta
Find Deal
ter, fev 18 - qui, mar 20
12:38 pm - 7:09 amBOS-ONT
21h 31m2 stops
$87Frontier
Find Deal
seg, dez 16
6:00 am - 5:28 pmBOS-ONT
14h 28m2 stops
$117Frontier
Find Deal
sex, jan 31
5:40 pm - 11:53 pmBOS-ONT
9h 13m1 stop
$154Delta
Find Deal
dom, jan 12
6:25 pm - 12:14 amBOS-ONT
8h 49m1 stop
$158Delta
Find Deal
qua, dez 11
10:49 am - 6:24 pmBOS-ONT
10h 35m2 stops
$159American Airlines
Find Deal
qua, jan 15
4:58 pm - 10:03 pmBOS-ONT
8h 05m1 stop
$174American Airlines
Find Deal
sex, dez 6
6:00 am - 2:44 pmBOS-ONT
11h 44m1 stop
$189United Airlines
Find Deal
qui, nov 28
3:14 pm - 8:51 pmBOS-ONT
8h 37m1 stop
$204United Airlines
Find Deal
ter, jan 7
7:10 pm - 12:10 amBOS-ONT
8h 00m1 stop
$328Southwest
Find Deal
seg, dez 23
8:35 am - 4:25 pmBOS-ONT
10h 50m2 stops
$363Southwest
Find Deal
ter, nov 26
7:07 am - 3:41 pmBOS-ONT
11h 34m1 stop
7:00 am - 6:54 pmONT-BOS
8h 54m1 stop
$372Alaska Airlines
Find Deal
ter, nov 26 - sex, dez 6
5:31 am - 12:03 pmBOS-ONT
9h 32m1 stop
10:10 am - 8:23 pmONT-BOS
7h 13m1 stop
$643American Airlines
Find Deal
ter, nov 26 - sáb, nov 30
5:45 am - 3:10 pmBOS-ONT
12h 25m1 stop
5:35 am - 5:55 pmONT-BOS
9h 20m2 stops
$701Southwest
Find Deal
ter, nov 26 - sáb, nov 30
8:35 am - 4:25 pmBOS-ONT
10h 50m2 stops
5:35 am - 5:55 pmONT-BOS
9h 20m2 stops
$727Southwest
Find Deal
ter, nov 26 - sáb, nov 30
8:27 am - 5:29 pmBOS-ONT
12h 02m1 stop
8:58 pm - 12:59 amONT-BOS
25h 01m1 stop
$734Alaska Airlines
Find Deal
dom, nov 24 - ter, nov 26
6:30 am - 12:03 pmBOS-ONT
8h 33m1 stop
7:30 pm - 5:33 amONT-BOS
7h 03m1 stop
$757American Airlines
Find Deal
dom, nov 24 - seg, dez 2
3:30 pm - 10:02 pmBOS-ONT
9h 32m1 stop
6:00 am - 7:28 pmONT-BOS
10h 28m1 stop
$922United Airlines
Find Deal
sex, nov 22 - sex, nov 29
6:00 am - 5:43 pmBOS-ONT
14h 43m2 stops
6:28 pm - 12:45 pmONT-BOS
15h 17m2 stops
$962United Airlines
Find Deal
dom, nov 24 - seg, dez 2
6:30 am - 12:11 pmBOS-ONT
8h 41m1 stop
1:18 pm - 11:59 pmONT-BOS
7h 41m1 stop
$1,017Delta
Find Deal
ter, nov 26 - dom, dez 1
6:30 am - 12:11 pmBOS-ONT
8h 41m1 stop
1:18 pm - 11:59 pmONT-BOS
7h 41m1 stop
$1,036Delta
Find Deal
sex, nov 22 - sáb, nov 23

Flights from Boston to Ontario - Travel Insights & Trends

Get data-powered insights and trends into flights from Boston to Ontario 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 Boston to Ontario?

The average price of all flights from Boston to Ontario clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to Ontario on a Monday and more expensive on a Sunday. On your return trip to Boston, you should consider flying back on a Tuesday, and avoid Sundays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Boston to Ontario, 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 Boston to Ontario is January, where tickets cost $362 on average. On the other hand, the most expensive months are October and June, where the average cost of tickets is $575 and $524 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Boston to Ontario, 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 Boston to Ontario, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 84 days before departure.

Good to know

Low season

September

High season

June

Cheapest flight

$87
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from Boston to Ontario

When to book flights from Boston to Ontario

Are your dates flexible? Find out the best times to travel from Boston to Ontario 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 Boston to Ontario

  • What is the cheapest flight from Boston to Ontario?

    In the last 3 days, the lowest price for a flight from Boston to Ontario was $87 for a one-way ticket and $308 for a round-trip.

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

    A passport is not required to fly from Boston to Ontario.

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

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

  • Which airline alliances offer flights from Boston to Ontario?

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

  • What is the most popular layover when flying to Ontario from Boston?

    Dallas is the most popular layover city among KAYAK users traveling from Boston to Ontario.

  • Which is the best airline for flights from Boston to Ontario, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Boston to Ontario are Southwest and Delta. With an average price for the route of $362 and an overall rating of 8.1, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $437 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Boston to 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 Boston to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Boston 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 Boston to 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 Ontario with an airline and back to Boston with another airline. Booking your flights between Boston and ONT 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 Boston to 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 to Ontario from Boston 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 Boston to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Boston to Ontario. 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 Boston to Ontario? 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.
8.1
SouthwestOverall score based on 5015 reviews
8.2Boarding
8.1Comfort
7.7Entertainment
7.2Food
8.7Crew
Airline reviews

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

8.0 ExcellentMark, Oct 2024LAX - SFO
Read more Southwest reviews

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a hell hole of an airport. It is the new LaGuardia. Everything Cobbled together. Security gates closed. Terri directional signage

I will be flying again Southwest Airlines. Friendly crew, comfortable and affordable.

The plane arrived 25 minutes late, and the Wi-Fi was slower than it usually is.

Forget beverage, they didn't even have water for half the passangers?

Can not wait for seating change to reduce the amount of pre boards - it’s disheartening the abuse. And then then deplaning

The crew was nice. Boarding sucked. Instead of loading from the back to the front people just sat wherever and you had to wait for them to move to get to a seat. And the flight was 25 minutes delayed.

I boarded last because of my boarding assignment and was given a middle seat at the back of the plane. I’m 6”1” so it was really tight. I wish I just had a seat assignment instead of a general boarding group. My bag was way at the front and my seat at the back. Was never offered a beverage and had no room to move.

The open seating makes passengers boarding ahead of you think they also have the right to the empty middle seat. Trumper next to me refused to move her laptop bag from my leg area. I did not make a fuss since it was a short flight.

Flight was delayed more than 2 hour do the scheduling issues and then some confusing weight and balance matters, followed by a miscommunication with the tower on which runway was going to be used based on the airplane weight. All these things should have been figured out in advance. Instead of arriving at 12:30 a.m. we arrived at 2:30 a.m. very difficult to find a taxi or other transport at SFO. Luggage was delayed. An extension of an unpleasant flight day

Only one side of the heafphone jack work. Crew was friendly and helpful.

Great. Flight departed early and arrived early. Deplaning and baggage claim ww were quick.

Don't waste your money or points on first class. Delta first class is a joke. The seats were rickety, the food was awful, and nothing worked, wifi, my light, the power plug - and it was dirty - the fold out table was gross. For 2-3 hours, tough it out in Economy.

They separated our seats and moved us to the back of the plane. Hundreds of dollars and thousands of miles used and this was my platinum member experience.

Flight was changed from departing from Boston to departing from Detroit.

AC barely worked on a 50 minute flight. It was very warm the whole flight. Flight was very bumpy and hard landing.

Got on the plane and then needed to deboard the plane because they didn’t have any pilots?

The flight was canceled two hours before departure, it took over five hours to rebook us on another flight.

Rough day of travel all the way around. Wrong info given to us multiple times and mistakes in their booking making our trip 10 hours longer than planned. I’m bummed because I fly Delta all the time and love them. Mistakes happen. Just bummed that this was a rare trip our whole family was traveling together.

Meh. A late flight meant I missed my connections, and a 2pm LAX arrival turned into gettin in after midnight.

Communication with the customer and stay is important. Staff off with a minor inconvenience but it worked out of course. Also this was a very old Mint Class plane. They snuck this one in on us. The updated aircraft are much better.

The flight itself was fine, but the boarding process was extremely frustrating. There is no one scanning boarding passes - passengers just scan themselves and enter the jetway. By the time my husband and I got on the plane and were halfway to our seats they determined there were too many bags on the plane and everything at that point needed to be checked. This created a lot of unnecessary chaos. They should have alerted people before getting on the plane that they would need to start checking bags instead of waiting until people were already on the plane.

Like the space, did not like the snack options, there was no power outlet in seats, no entertainment, no flyfi.

I volunteered to let them put my carry on suitcase in the baggage storage area. But when we landed I was told it was being unloaded IN A DIFFERENT TERMINAL! I had to walk (painful for me) a long way to retrieve my bag and my ride had to move from the waiting area they were in to a totally different one. Not happy.

The WiFi stopped working early on in the flight. No audio from entertainment system.

Overall fine but both ways for this trip was delayed.

I had back trouble prior to my flight and everyone was great about helping me.

My tv was broken on the flight which is disappointing when you pay for a seat and expect a service

Always delays from Boston to Salt lake but this time was very long. Don’t understand while they board the passengers and then make them sit in the plane

The boarding and flight were ok, but there were several painful issues. The flight was 3:20 in the air and almost four hours door to door, but they only had snack packs on the plane. They really need to have food on longer flights or make it clear to everyone that they won’t have food. They also advertise free WiFi, but it did not work for 90% of this flight. Again, almost four hours door to door. If I had known I was flying spirit for JetBlue prices then I would have planned differently.

Cabin was pitch black, even during meal service. The reading lights for seat 2E/F did not work, and seat 2E did not recline.

This was a 5 hour flight with no entertainment and with a snack being provided (pretzels and fruit bar), which are both high in carbs and sugar. Nuts would have been a better choice.

Pleasant service from the crew. Arrived early. Efficient boarding and deplaning. Great job!

Was realllly smooth. It was delayed but we were well informed.

Good plane, crew, and flight. Boarding was a bit chaotic. Bathrooms were unacceptable. United DESPERATELY needs a new terminal at IAD.

Haven’t used United in a while. Was surprised with the free blanket and earphones. Service was great. Huge plane. 9/.row.

Delayed by 2.5hrs any longer and they would’ve had to honour their own policy for breaking their own rules and regs. Not cool, especially when I have an infant child that needs to stay on a routine and they get schedules.

To san Francisco it was ok. From sf to Manila it was horrible

Awful, rude staff. Their abrasive comments are unnecessary. Most seek a frictionless experience and will cooperate if you ask. Additional childish bullying of customers is not acceptable or tolerated. We had the same problem with our departure flight. We will never fly United again.

Very poor the plane itself was really old, slight smell that couldn’t be named. I didn’t even get a boarding pass UNTIL AFTER clearing security! Even then, they said when I get to my connected flight I’ll get my 2nd boarding pass there! A bit ridiculous!

My boarding pass wouldn't pull up in the app very easily and had to really dig through my email. That caused a delay in TSA..

Overall flight was as expected. It would have been better with a couple options for snack instead of only one item and if there was a TV or music as option. But overall satisfied.

RE Food: Wish there was a choice for No Rating. Flew from Honolulu to Los Angeles on a Red-Eye flight (11:00 pm to 7:30 am). Other than a package of cookies with a beverage choice offered soon after take-off, and a beverage choice shortly before landing, no other food choices were offered. Everyone slept or rested for most of the trip. Nothing to rate. RE Entertainment: Everyone was sleeping most of the flight. Only saw one passenger watch about 30 minutes of entertainment on his iPad. I never attempted to access any entertainment options.

Baby cried a lot. Nothing anyone could do about it. Just part of flying.

AA is fabulous. However , Iberia cancelled our Boston - Barcelona flight the morning of the flight - 9/16/24. This was almost a week ago and we have still heard nothing from Iberia/Vueling. Found out from a kayak email that morning that the flight was cancelled. Iberia Customer service reps wouldn’t help us and said to call Vueling. No one answers phone at Vueling. Terrible wild goose chase on DAY OF TRAVEL. AA came to our rescue.

Boston ticket agent Cheryl Porter is WONDERFUL. Our Iberia flight to Barcelona was cancelled the morning we were scheduled to leave and Cheryl was our super hero - she found us seats on a flight to London and on to Barcelona. Truly a “can-do” attitude which we appreciated so much after the Iberia ticket agents told us there was “absolutely nothing they could do”. (As did the customer service agents at Iberia’s call center) Ms Porter is truly a wonderful person who genuinely cares about travelers!

For coast to coast travel the A321 and even the NEO, even in first class will never be excellent. That would take a B787 or 777 to accomplish.

The flight crew was fantastic! Which the seats had a small TV.

The foot ottoman cushion was missing on my business class seat.. the hydraulics is on its last leg & seat cushions do not have support or paddling. Heavily dented by butts

also wi-fi never worked attendant said satellite coverage is spotty over water ..... but we were over land!

Book cheap flights from Boston to Ontario

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Boston to Ontario found on KAYAK in the last 72 hours.
12/16seg
2 stopsFrontier
21h 31mBOS-ONT
$87
1/31sex
2 stopsFrontier
14h 28mBOS-ONT
$117
1/12dom
1 stopDelta
9h 13mBOS-ONT
$154
12/11qua
1 stopDelta
8h 49mBOS-ONT
$158
1/15qua
2 stopsAmerican Airlines
10h 35mBOS-ONT
$159
12/6sex
1 stopAmerican Airlines
8h 05mBOS-ONT
$174
11/28qui
1 stopUnited Airlines
11h 44mBOS-ONT
$189
1/7ter
1 stopUnited Airlines
8h 37mBOS-ONT
$204
12/23seg
1 stopSouthwest
8h 00mBOS-ONT
$328
11/26ter
2 stopsSouthwest
10h 50mBOS-ONT
$363

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Last minute flights from Boston to Ontario

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 Boston to Ontario that are departing in the next 10 days.
11/26ter
multi-stopAlaska Airlines
11h 34mBOS-ONT
12/6sex
multi-stopAlaska Airlines
8h 54mONT-BOS
$372
11/26ter
multi-stopAmerican Airlines
9h 32mBOS-ONT
11/30sáb
multi-stopAmerican Airlines
7h 13mONT-BOS
$643
11/26ter
multi-stopSouthwest
12h 25mBOS-ONT
11/30sáb
multi-stopSouthwest
9h 20mONT-BOS
$701
11/26ter
multi-stopSouthwest
10h 50mBOS-ONT
11/30sáb
multi-stopSouthwest
9h 20mONT-BOS
$727
11/24dom
multi-stopAlaska Airlines
12h 02mBOS-ONT
11/26ter
multi-stopAlaska Airlines
25h 01mONT-BOS
$734
11/24dom
multi-stopAmerican Airlines
8h 33mBOS-ONT
12/2seg
multi-stopAmerican Airlines
7h 03mONT-BOS
$757
11/22sex
multi-stopUnited Airlines
9h 32mBOS-ONT
11/29sex
multi-stopUnited Airlines
10h 28mONT-BOS
$922
11/24dom
multi-stopUnited Airlines
14h 43mBOS-ONT
12/2seg
multi-stopUnited Airlines
15h 17mONT-BOS
$962
11/26ter
multi-stopDelta
8h 41mBOS-ONT
12/1dom
multi-stopDelta
7h 41mONT-BOS
$1,017
11/22sex
multi-stopDelta
8h 41mBOS-ONT
11/23sáb
multi-stopDelta
7h 41mONT-BOS
$1,036

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Everything you need to know for your flight from Boston to Ontario

Information on your arrival and departure airports

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