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BOS - ONT

$148 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 5/30. 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
Sat 6/15
Sat 6/22

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Ontario.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Ontario.
In the last 7 days travelers have searched 42,211,976 times on KAYAK, and here is why:

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Cheap flight deals from Boston to Ontario (BOS-ONT)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Ontario 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
3:20 pm - 10:28 pmBOS-ONT
10h 08m1 stop
11:45 pm - 12:49 pmONT-BOS
10h 04m1 stop
$274JetBlue
Find Deal
Tue, Aug 6 - Sun, Aug 11
3:00 pm - 10:00 pmBOS-ONT
10h 00m1 stop
4:45 pm - 5:55 amONT-BOS
10h 10m1 stop
$285American Airlines
Find Deal
Wed, Sep 25 - Tue, Oct 1
6:00 am - 11:10 amBOS-ONT
8h 10m1 stop
12:45 pm - 1:14 amONT-BOS
9h 29m1 stop
$296Delta
Find Deal
Wed, Aug 28 - Sun, Sep 1
6:20 am - 12:13 pmBOS-ONT
8h 53m1 stop
6:42 pm - 6:59 amONT-BOS
9h 17m1 stop
$311Delta
Find Deal
Fri, May 31 - Tue, Jun 4
6:00 am - 12:15 pmBOS-ONT
9h 15m1 stop
6:25 pm - 6:00 amONT-BOS
8h 35m1 stop
$332United Airlines
Find Deal
Wed, Jul 24 - Fri, Aug 9
1:35 pm - 10:27 pmBOS-ONT
11h 52m1 stop
6:25 pm - 6:00 amONT-BOS
8h 35m1 stop
$355United Airlines
Find Deal
Wed, Jun 5 - Sun, Jun 16
5:30 am - 3:05 pmBOS-ONT
12h 35m1 stop
8:00 am - 1:00 amONT-BOS
14h 00m1 stop
$375Southwest
Find Deal
Tue, Jun 11 - Fri, Jun 14
7:14 am - 10:20 pmBOS-ONT
18h 06m2 stops
4:28 pm - 5:44 amONT-BOS
10h 16m1 stop
$475Alaska Airlines
Find Deal
Sat, Sep 7 - Mon, Sep 9
7:59 pm - 9:15 amBOS-ONT
16h 16m1 stop
7:00 am - 8:20 amONT-BOS
22h 20m1 stop
$537Alaska Airlines
Find Deal
Fri, Sep 20 - Sun, Sep 22
5:30 am - 3:15 pmBOS-ONT
12h 45m2 stops
6:00 am - 12:05 amONT-BOS
15h 05m2 stops
$539Southwest
Find Deal
Tue, Jun 18 - Thu, Jun 20

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 Wednesday and more expensive on a Sunday. On your return trip to Boston, you should consider flying back on a Saturday, 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 September, where tickets cost $297 on average. On the other hand, the most expensive months are June and November, where the average cost of tickets is $514 and $491 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 1 week before departure. For the absolute cheapest price, our data suggests you should book 47 days before departure.

Which airlines provide the cheapest flights from Boston to Ontario?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the best return deals on flights connecting Boston to Ontario were found on JetBlue ($274) and American Airlines ($285). Delta proposed the cheapest one-way flight at $148.

Good to know

Low season

September

High season

August

Cheapest flight

$148
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 1% 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 $148 for a one-way ticket and $274 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?

    Phoenix 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, Delta or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Boston to Ontario are Delta and Alaska Airlines. With an average price for the route of $436 and an overall rating of 8.0, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $171 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.
8.0
DeltaOverall score based on 10673 reviews
7.9Comfort
7.4Food
8.0Entertainment
8.6Crew
8.2Boarding
Airline reviews

Everything went smoothly. I didn’t like that when I booked in the main cabin my wife and I weren’t seated together. One would think when booking on an option that allows picking your seat. They would put you and your travel partner together. Had to call to get it sorted. They did fix.

8.0 ExcellentEric, May 2024BOS - CUN
Read more about Delta reviews

Everything went smoothly. I didn’t like that when I booked in the main cabin my wife and I weren’t seated together. One would think when booking on an option that allows picking your seat. They would put you and your travel partner together. Had to call to get it sorted. They did fix.

They did a fine job. Can't wait to use Delta in the future.

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

Had a broken tray in business class. Crew just shrugged it off.

Seats in first class on the E175 recline too far back. I was in 2A, and the man in 1A fully reclined almost the entire flight. It took 6-7 inches of space away from me and made it very difficult to work on my laptop.

I didn’t like that I could not select my seat and was assigned a seat when I checked in at LAX

Great experience overall. Check in at Austin was congested as they only have about 6 check in kiosks, one was broken, and there was a lot of Spring Break travelers.

Mario was great. Made a night flight on a small aircraft pleasant and memorable.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Crew were exceptional. Plane was quiet and quite empty, so I had a row to sleep across.

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

Service for food to our seat was a bit slow. Snack choices were just pretzels or baked chips. My seat cushion was not attached. Other than Barbie, video choice were not very good or current.

After we landed, we were held on the plane for 30 minutes. There was no one at the gate once we landed and we forced to sit on a plan that had already over an hour delayed.

almost 4 hour delay as they over booked and had to wait for 8-10 volunteers to agree to travel next day.

Old plane. No outlets for laptop or phone. Seats worn out. Area around seat dirty.

I loved the flight and the crew. It was comfortable and smooth.

The crew was openly hostile and condescending to the customers. They spent the majority of that time in the rear talking and seemed really agitated when people asked questions. I heard five different people told that the information they requested was in the handout or safety brief.

ticketing issues caused many customers to have to go back to check in after waiting in security, then go through security line again.

No lounge access with “United First” ticket. False alarm about late flight, jeopardizing connection. Wrong meal. Loose power socket would not hold plug, could not charge device. In-flight access to text messaging did not work. Toilet seat on plane would not stay up.

Check in etc was very good. As for on the plane, it was like flying in a freezer. It was so cold, i have flown for years and never been so cold on a plane. Staff on board said its always cold when flying which is a load of rubbish. They wouldnt put any heating on and now i have the flu because of this .

I’ve had a couple flights this week on United that were delayed by an hour or more

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

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

Our original business class flight was cancelled so we not only downgraded but we were also spread out across the plane not sitting together in separate middle seats. My poor kids were scared and couldn’t see me on the flight and the crew wasn’t sensitive to the situation and what the airlines did to us. Very dissatisfied with United airlines.

The WiFi didn’t work and the seats are too close together. Very uncomfortable.

So so. Terrible aircraft choice for that leg of the flight.

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

Fight crew was not very attentive and the bastions were gross!

Our flight was great we left Kona earlier and got into LAX almost an 1hour earlier as well. LAX AA is in repair so to get out and found our bus to get pick up was a bit confusing.

Plane was good but was delayed. probably not AA fault but caused a 1 hour delay. Seating was cramped.

5 hour flight - full flight - not enough room to use my computer - slightly delayed - Admirals club was excellent quality food, drink made up for flight seating. No food offerred on flight, you ahd to prebook.

delayed delayed delayed. was supposed to have a 2 hour layover and very nearly missed my connection.

We experience delays on departure and connecting flights resulting in 14 hour to our next departure. We were accommodated with a night's stay but was only provided a 12 dollar meals accommodation. The airlines rules state.at least 50 dollars. In any case, it can not make up for the whole day missed on our vacation in Sydney Australia.

I can say I will not be taking this airline again any time soon. Seat were uncomfortable and too tight. Lack of chair screen and little overhead space.

Plane felt so crowded and tightly packed. The chair itself was not comfortable.

Despite a bumpy flight the pilot was great. The rest of the crew on the other hand couldn’t care less if a passenger would colapse and die. Horrible service, robot like, lifeless…

They attended to my needs as I couldn't walk and they provided a wheelchair for me.q

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

The guy with severe body odor sat next to me. For the whole duration of the flight it was a torture. The airline should have better policy on limiting people with bad body odor to board the flight. Passengers should not be the ones to endure bad odor for the whole duration of the flight. The airline should be e the one to ensure decent air quality for ever passenger.

They charged me 212.00 for a heavy check in bag at the gate. The pricing and process was so confusing - as if it was designed to purposefully gouge customers who need to board plane. That experience combined with the outrageous price charged will prevent me from ever flying Spirit again. And I’ll be sure to tell the story to anyone who cares to hear.

The text told me it was changed to Terminal E and Gate D5. But with no one on site to ask questions there was confusion on where to go as all the gates were E's. Then we took the skyline to the D area. We left to get something to eat. No announcement was made but my daughter happened to asked and they told her our gate was moved to D12. I will not fly Spirit again.

The agent at the check in desk was absolutely rude. The rest of the team after that was good, but the check in process at LAS was miserable. The woman at the desk spoke like we were stupid and was rude throughout the process.

Its so random that they only allow 40 pounds on checked bags when all airlines take 55. They then charge you for each 10 extra pounds, so my checked suitcase was $130 and the flight $30 ... its like whattt, im for sure not traveling with Spirit again

So bad. The check in process was laborious and the check in agent didn't seem to know how to manage the process efficiently and was confused about how to check in my son's sports equipment. The baggage fees were outrageous and so expensive. $90 for a carry on bag? And $200 additional for 2 check ins. The security lines were insanely long and the terminal was not very nice in the Spirit area. $5 for a water on board. It was my first and last time flying Spirit - I tried to save $ by flying them due to the accommodating schedule but I should have paid for Southwest, because it would've actually ended up less expensive due to the free bags with Southwest. There were no charging ports on the airplane, no wifi and really uncomfortable seating. The flight crew were great though, courteous and efficient in their boarding. Flight was delayed 1 hour, but we made up 15 minutes in flight.

My experience was better than expected. What I did find not so great was the seats. Very little room, they did not recline and the tray table was the size of a post card. There was no food to try, just standard snacks that you had to pay for and I don’t know of any entertainment. I would fly again even though everything was an upcharge. Flight was on time with little disturbance

thy don't even ofer water we have to buy it for $4.49 and paid for our cary on bags $100 each we never will fly in this company again.

Super cool and laid back, three lovely ladies. Couldn’t ask for better service.

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.
5/30Thu
1 stopDelta
8h 53mBOS-ONT
$148
8/6Tue
1 stopJetBlue
10h 08mBOS-ONT
$150
7/4Thu
1 stopAmerican Airlines
8h 50mBOS-ONT
$153
6/4Tue
1 stopAmerican Airlines
8h 55mBOS-ONT
$162
5/29Wed
1 stopAlaska Airlines
9h 28mBOS-ONT
$163
6/5Wed
1 stopUnited Airlines
8h 48mBOS-ONT
$193
5/30Thu
2 stopsUnited Airlines
13h 49mBOS-ONT
$198
6/8Sat
2 stopsAlaska Airlines
19h 58mBOS-ONT
$262
6/1Sat
3 stops
34h 30mBOS-ONT
$479
8/5Mon
3 stops
28h 55mBOS-ONT
$492

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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.
5/21Tue
multi-stopSouthwest
11h 25mBOS-ONT
5/22Wed
multi-stopSouthwest
9h 35mONT-BOS
$572
5/21Tue
multi-stopUnited Airlines
8h 45mBOS-ONT
5/30Thu
multi-stopUnited Airlines
8h 35mONT-BOS
$611
5/21Tue
multi-stopSouthwest
11h 25mBOS-ONT
5/22Wed
multi-stopSouthwest
12h 05mONT-BOS
$686
5/21Tue
multi-stopUnited Airlines
12h 14mBOS-ONT
5/23Thu
multi-stopUnited Airlines
10h 59mONT-BOS
$711
5/17Fri
multi-stopJetBlue
10h 12mBOS-ONT
5/19Sun
multi-stopJetBlue
11h 04mONT-BOS
$785
5/17Fri
multi-stopDelta
9h 41mBOS-ONT
5/19Sun
multi-stopDelta
9h 44mONT-BOS
$867
5/21Tue
multi-stopAmerican Airlines
8h 55mBOS-ONT
5/25Sat
multi-stopAmerican Airlines
9h 44mONT-BOS
$877
5/19Sun
multi-stopAmerican Airlines
9h 27mBOS-ONT
5/27Mon
multi-stopAmerican Airlines
9h 16mONT-BOS
$879
5/17Fri
multi-stopAlaska Airlines
11h 11mBOS-ONT
5/20Mon
multi-stopAlaska Airlines
10h 29mONT-BOS
$891
5/19Sun
multi-stopAlaska Airlines
18h 18mBOS-ONT
5/26Sun
multi-stopAlaska Airlines
10h 59mONT-BOS
$1,064

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Boston - Ontario Flights

Departure:

Boston (undefined)United States

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - Boston

Cabin classes: