Find flights
Deals
Insights
When to book
FAQs & Tips
Airlines

BOS - ONT

$124 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 8/21. 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 Ontario

 
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 42,898,604 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

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
1:10 pm - 10:05 pmBOS-ONT
11h 55m1 stop
11:36 pm - 1:13 pmONT-BOS
10h 37m1 stop
$248JetBlue
Find Deal
Wed, Sep 18 - Mon, Sep 23
1:10 pm - 10:21 pmBOS-ONT
12h 11m1 stop
11:36 pm - 10:14 amONT-BOS
7h 38m1 stop
$274JetBlue
Find Deal
Sun, Sep 15 - Sat, Sep 21
2:46 pm - 10:09 pmBOS-ONT
10h 23m2 stops
10:51 am - 11:42 pmONT-BOS
9h 51m1 stop
$291American Airlines
Find Deal
Wed, Sep 18 - Tue, Sep 24
1:45 pm - 9:11 pmBOS-ONT
10h 26m1 stop
6:25 pm - 6:00 amONT-BOS
8h 35m1 stop
$296United Airlines
Find Deal
Thu, Jul 4 - Mon, Jul 8
12:23 pm - 7:22 pmBOS-ONT
9h 59m1 stop
3:45 pm - 6:20 amONT-BOS
11h 35m1 stop
$297Delta
Find Deal
Tue, Oct 22 - Thu, Oct 31
1:55 pm - 7:22 pmBOS-ONT
8h 27m1 stop
5:50 pm - 6:20 amONT-BOS
9h 30m1 stop
$298Delta
Find Deal
Tue, Oct 22 - Wed, Oct 30
10:57 am - 6:07 pmBOS-ONT
10h 10m2 stops
4:57 pm - 6:01 amONT-BOS
10h 04m1 stop
$301American Airlines
Find Deal
Tue, Sep 17 - Mon, Sep 23
7:00 am - 10:20 pmBOS-ONT
18h 20m1 stop
4:28 pm - 5:44 amONT-BOS
10h 16m1 stop
$355Alaska Airlines
Find Deal
Tue, Sep 10 - Tue, Sep 17
7:59 pm - 10:15 pmBOS-ONT
29h 16m2 stops
4:28 pm - 5:44 amONT-BOS
10h 16m1 stop
$360Alaska Airlines
Find Deal
Tue, Sep 3 - Tue, Sep 10
6:00 am - 12:15 pmBOS-ONT
9h 15m1 stop
6:25 pm - 6:00 amONT-BOS
8h 35m1 stop
$386United Airlines
Find Deal
Tue, Jul 2 - Tue, Jul 2

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 $517 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 5 days 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 ($248) and American Airlines ($291). JetBlue proposed the cheapest one-way flight at $124.

Good to know

Low season

September

High season

August

Cheapest flight

$124
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly and prices are also 0% lower on average.
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 $124 for a one-way ticket and $248 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?

    oneworld, Star Alliance, and SkyTeam 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 $428 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 10295 reviews
8.0Entertainment
8.6Crew
8.2Boarding
7.9Comfort
7.4Food
Airline reviews

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

2.0 MediocreFelipe, Jun 2024DTW - SAN
Read more about Delta reviews

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

The Flight crew didn’t serve us until about 1.5 hours into the flight because of turbulence but after it ended it was fine to move around. They served us water only and snacks and then NEVER, NOT ONE TIME came through to collect trash until right before landing about 1.5 hours later. There was absolutely no need for that. They crew was just standing around talking and visiting with each other and really never tried to see if we might want something besides water or even try to come pick up trash. This is VERY unusual for a Delta flight but it was not what I would have expected for a 4 hour flight.

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

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

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.

Crew was very cooperative and professional. Passenger's first checked in bag should be free.

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.

Flighty delayed on boarding - then group 1 had to check their carry on bags but groups 3 and beyond could carry bags on - very inconvenient for weekend business trip with no checked baggage. Then delayed on the runway - before take off. No communication from pilot on why or how long. Wifi/Entertainment didn't work for 4+ flight. Upon arrival, attendants announced wrong carousel for baggage claim - everyone was waiting at the wrong place for their checked bags. This was a mess united!

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

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.

My husband and I pre-ordered our food, but they did not have my husband’s order, and my cheese plate was very average. I asked for a blanket and was told they don’t carry blankets on domestic routs. The flight was on time and smooth!

There were delays on both ends. It made it less than excellent. This plane was great though

Worst experience flying American Airlines. I fly with them often, so I was super disappointed in the service I received at gate 30 in LGA on May 24, mid-day. The flight was delayed twice. I was patiently waiting in the American Airlines lounge when I received the notice on my app that the plane was boarding 45 minutes before its newly re-scheduled take off of 4 pm (from the orginal 1:45 pm then 3:00 pm). It took me 5 min to travel from the lounge to the gate and when I arrived there at 3:20 flight gate attendant told me the flight had closed and that they announced for passengers multiple times. I showed them the notification on my app and they were really rude and unempathetic. The person who rescheduled my flight at customer service wasn't any happier but was at least helpful in getting me on the next flight.

Everything was great except for the wifi was junk. Crew was super friendly and helpful

Attendants were rude. Scowling. Seats were miserable and we paid extra.

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.

Flight was good and clean but delayed over an hour on the return flight.

It was nice! There was a very unhappy child in front of us and the flight attendant did a great job calming the child. I was impressed.

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

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.
8/21Wed
1 stopJetBlue
10h 53mBOS-ONT
$124
10/1Tue
1 stopJetBlue
12h 11mBOS-ONT
$129
9/14Sat
1 stopAmerican Airlines
11h 07mBOS-ONT
$143
8/21Wed
2 stopsAmerican Airlines
9h 59mBOS-ONT
$148
9/6Fri
1 stopUnited Airlines
9h 01mBOS-ONT
$192
7/1Mon
1 stopUnited Airlines
9h 15mBOS-ONT
$193
8/14Wed
2 stopsAlaska Airlines
12h 54mBOS-ONT
$204
8/15Thu
2 stopsAlaska Airlines
14h 36mBOS-ONT
$218
6/18Tue
1 stopDelta
9h 02mBOS-ONT
$243
7/12Fri
1 stopDelta
9h 05mBOS-ONT
$258

Search by stops

Search by airline

Search by price

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.
6/14Fri
multi-stopJetBlue
10h 58mBOS-ONT
8/27Tue
multi-stopJetBlue
10h 02mONT-BOS
$584
6/13Thu
multi-stopDelta
8h 32mBOS-ONT
6/17Mon
multi-stopDelta
10h 22mONT-BOS
$592
6/13Thu
multi-stopAmerican Airlines
10h 22mBOS-ONT
6/18Tue
multi-stopAmerican Airlines
7h 38mONT-BOS
$597
6/13Thu
multi-stopAmerican Airlines
9h 59mBOS-ONT
6/18Tue
multi-stopAmerican Airlines
9h 59mONT-BOS
$602
6/12Wed
multi-stopAlaska Airlines
11h 11mBOS-ONT
6/17Mon
multi-stopAlaska Airlines
8h 35mONT-BOS
$611
6/11Tue
multi-stopAlaska Airlines
9h 28mBOS-ONT
6/17Mon
multi-stopAlaska Airlines
8h 35mONT-BOS
$692
6/11Tue
multi-stopSouthwest
11h 10mBOS-ONT
6/14Fri
multi-stopSouthwest
9h 35mONT-BOS
$710
6/11Tue
multi-stopSouthwest
12h 45mBOS-ONT
6/14Fri
multi-stopSouthwest
8h 30mONT-BOS
$715
6/13Thu
multi-stopUnited Airlines
12h 22mBOS-ONT
6/17Mon
multi-stopUnited Airlines
15h 44mONT-BOS
$735
6/14Fri
multi-stopUnited Airlines
10h 33mBOS-ONT
6/16Sun
multi-stopUnited Airlines
8h 35mONT-BOS
$746

Search by stops

Search by airline

Search by price

Boston - Ontario Flights

Departure:

Boston (BOS)United States

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - Boston

Cabin classes: