ONT - BOS

$105 Find Cheap Flights from Ontario to Boston

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 Boston departing on 5/7. 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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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Boston.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Boston.
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Cheap Flights from Ontario to Boston

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Boston 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.

Recent round-trip flight deals from Ontario to Boston

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ontario to Boston.
Discover the best prices for you by selecting your travel dates on KAYAK.
Frontier Logo
8:07 pm - 11:01 amONT-BOS
11h 54m1 stop
Frontier Logo
11:56 am - 7:12 pmBOS-ONT
10h 16m1 stop
$218Frontier
Find Deal
Thu, Jun 5 - Mon, Jun 9
Frontier Logo
6:47 pm - 12:07 pmONT-BOS
14h 20m1 stop
Frontier Logo
11:56 am - 7:12 pmBOS-ONT
10h 16m1 stop
$228Frontier
Find Deal
Sat, May 17 - Mon, Jun 2
American Airlines Logo
10:00 am - 8:14 pmONT-BOS
7h 14m1 stop
American Airlines Logo
4:54 pm - 9:57 pmBOS-ONT
8h 03m1 stop
$269American Airlines
Find Deal
Sat, May 24 - Fri, May 30
American Airlines Logo
10:50 am - 11:44 pmONT-BOS
9h 54m2 stops
American Airlines Logo
7:15 am - 1:41 pmBOS-ONT
9h 26m1 stop
$293American Airlines
Find Deal
Wed, Aug 27 - Sun, Aug 31
Delta Logo
11:49 am - 10:43 pmONT-BOS
7h 54m1 stop
Delta Logo
6:00 am - 12:17 pmBOS-ONT
9h 17m1 stop
$297Delta
Find Deal
Tue, Jul 1 - Sat, Jul 5
United Airlines Logo
6:41 pm - 5:54 amONT-BOS
8h 13m1 stop
United Airlines Logo
2:34 pm - 10:26 pmBOS-ONT
10h 52m2 stops
$298United Airlines
Find Deal
Sat, May 31 - Sat, Jun 7
Delta Logo
11:49 am - 10:43 pmONT-BOS
7h 54m1 stop
Delta Logo
5:35 am - 10:40 amBOS-ONT
8h 05m1 stop
$302Delta
Find Deal
Tue, Jul 1 - Wed, Jul 9
United Airlines Logo
6:08 am - 6:11 pmONT-BOS
9h 03m1 stop
United Airlines Logo
6:05 am - 12:24 pmBOS-ONT
9h 19m1 stop
$319United Airlines
Find Deal
Sun, May 11 - Thu, May 15
Southwest Logo
10:35 am - 11:20 pmONT-BOS
9h 45m2 stops
Southwest Logo
6:40 am - 12:40 pmBOS-ONT
9h 00m2 stops
$339Southwest
Find Deal
Mon, Aug 18 - Fri, Aug 22
Southwest Logo
7:10 pm - 8:10 amONT-BOS
10h 00m2 stops
Southwest Logo
2:30 pm - 9:05 pmBOS-ONT
9h 35m2 stops
$352Southwest
Find Deal
Tue, Aug 5 - Mon, Aug 11
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KAYAK's insights & trends for Ontario to Boston flights

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

Find cheap flights to Boston
Find cheap flights to Boston

Planning a trip from Ontario to Boston? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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

The average price of all round-trip flights from Ontario to Boston clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Boston on a Tuesday and more expensive on a Sunday. On your return trip to Ontario, you should consider flying back on a Tuesday, and avoid Sundays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Boston, 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 Boston is August, where tickets cost $368 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $557 and $542 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Boston, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ontario to Boston, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low seasonJanuary
High seasonJune
Cheapest flight$105
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 28% increase in price.
Flight from Ontario to Boston

When to book flights from Ontario to Boston

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

  • Does ONT have an on-site hotel?

    ONT does not have a hotel within its grounds. However, if you intend to stay at a hotel near this airport, you’ll be spoilt for choice, as Candlewood Suites Ontario Convention Center, Comfort Suites Ontario Convention Center, and Azure Hotel & Suites Ontario Airport are all a short distance from the airport.

  • Can I breastfeed my baby at ONT?

    If you’re traveling with a baby, you can take advantage of one of the nursing suites available at ONT to breastfeed your infant. These nursing suites are present across from gate 207 in Terminal 2 and across from gate 407 in Terminal 4.

  • Can I rent a car at BOS?

    If you’d like to rent a car at BOS, you’ll be happy to hear that this airport features a Rental Car Center that hosts offices for car rentals like Hertz, Avis, Budget, Dollar, SIXT, and Thrifty. To get to this Rental Car Center, you’ll have to board one of the white or blue shuttle buses present on the lower level of the airport’s main terminal.

  • Does BOS have a prayer room?

    If you’re a religious individual, you’ll get the chance to pray before exiting BOS, as it boasts an expansive and well-maintained prayer room. This prayer room referred to as the Our Lady of the Airways Chapel, is situated in Terminal C, on the Arrivals Level, a short distance past Baggage Claim 8.

  • What is the cheapest flight from Ontario to Boston?

    In the last 3 days, the lowest price for a flight from Ontario to Boston was $105 for a one-way ticket and $218 for a round-trip.

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

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

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

    Ontario airport is called Ontario and the only airport in Boston is Boston Logan Intl.

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

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

  • Which airline alliances offer flights from Ontario to Boston?

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Ontario to Boston are Southwest and Delta. With an average price for the route of $467 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $404 and an overall rating of 8.0.

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

    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 Boston.

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

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

    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 Boston with an airline and back to Ontario with another airline. Booking your flights between Ontario and BOS 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 Boston?

    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 Boston from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Ontario to Boston

  • On the date you’re set to fly from Ontario Airport (ONT), it’s in your best interest to arrive at the airport at least an hour before your flight. Arriving this early will give you enough time to go through the airport’s tedious security checkpoints. Getting to the airport this early will also give you time to check out the airport’s points of interest.
  • If you’re disabled, you can get the assisted travel services you require on your flight from ONT to Boston Logan International Airport (BOS), provided you inform the airline you intend to travel with of your needs at least 72h before your flight. It’s advisable that you inform your airline of your needs 72h before your flight so that they can prepare adequately for you.
  • In case you intend to leave your car at a parking garage at ONT till you fly back, you should consider doing so at one of the off-site garages near the airport. This will save you some money, as the off-site garages charge cheaper rates than the airport’s on-site garages.
  • BOS is a pet-friendly airport. If you’ve traveled with a pet to this airport, you can let it relieve itself at one of the airport’s pet relief areas, available on the Arrivals Level curb of every terminal.
  • If you’re a fan of art, you should consider walking around BOS airport before departing it. This is because at all the terminals, you’ll be able to spot various art installations. It’s worth noting that the artworks on display at this airport’s art installations are all pieces done by local artists.

Top 5 airlines serving from Ontario to Boston

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Boston. 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 Boston? 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
SouthwestOverall score based on 4294 reviews
8.0Comfort
8.6Crew
8.2Boarding
7.6Entertainment
7.1Food
Airline reviews

It was a perfect flight in all aspects! Both legs!

10.0 ExcellentAnonymous, Apr 2025LGB - SMF
Read more Southwest reviews

It was a perfect flight in all aspects! Both legs!

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

We had a nice flight. Boarding was easy, our seats were comfortable and the on board service was pleasant.

Service was great, boarding and exiting went smoothly, and the flight was very pleasant.

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

Delta flight was on time, seats were comfortable, and crew was nice.

Delta is a cut above the others in customer service.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

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

Newer plane, relatively easy boarding, not a full flight and was told that we could not be moved up because of weight and balance issues. Otherwise, a very good experience.

I think they can provide the better food/snack option for the 4 hours flight. Drinks are fine.

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.

The food was good. I ate gnocchi with marinara sauce and cheese, salted caramel tiramisu. And later in the trip cheese calzone. I watched 3 movies. The selection is really good. Have new and old movies. The flight attendances were nice and cordially. Overall the 6 hours trip was really pleasant ☺️. Planning the next trip.

The gate was too far away for the connecting flight

Compared with other carriers business class for an overnight was not worth the extra expense.

Easy to board. Flight was super crowded though so I didn't sleep well on that cross country red-eye flight. The aisles seem ot have gotten narrower and the seat smaller whn luggage and people are getting bigger so it would be AWESOME to have more space and breathing room in general ;)

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.

It’s been awhile since I have traveled on United. I, along with my family who were on the flight noted how smoothly everything went . Boarding, flight crew and service was excellent.

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

I was forced to check my carry-on backpack despite there being space - but it came out on the baggage carousel so fast it didn't even delay my pickup. Otherwise a good flight. Boarding began early (which was disadvantageous for me) but fine.

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

Plane left & arrived early- 5 Crew great. Wi fi - paid for 2, only 1 worked - so so. Waste of $. Coolie was good

Excellent. Although they used to greet me as a mosaic member and provide a free drink, early boarding helps me to keep coming back to JetBlue.

Great flight. Departed early, arrived early. However they were out of meals for sale. Also, we arrived early and the gate was not available so we sat on the taxiway for quite a while (not JetBlue’s fault).

Cancelled flight with no specific instructions to get a boarding pass for another flight. The whole flight of people were in line for an hour because there was only 1 person to help at the desk. This was unusual for JetBlue.

It was too hot in the cabin. The AC did not help.

Except for the 28 minute delay leaving and the earlier reschedule to a later takeoff time the flight was good.

Loved the leg room and tvs screens on the seats and free WiFi. Wish the price was lower and could save by rebooking

Love the mosaic program, being able to move to an extra space seat for free is awesome

Smooth boarding and friendly crew. Unfortunately as soon as we boarded the unit that provides air circulation failed. The pilot informed us and requested maintenance technicians to check it out. The plane became uncomfortably warm without any fresh air coming in. Plus the repair delayed our departure. I am glad the maintenance crew were able to fix the problem. I also was without use of my tv monitor for the first 1/3rd of the trip.

I paid for the service of having the right to choose my seat and it was not like that, they put me where they wanted and I explained to one of the staff that they were before boarding and they were very rude. I am traveling with the family and they put us in separate seats.

Little snafu at boarding. Staff communicated with gate poorly. Flight attendant was rude making disembark early. This was an older mint class. Needs an overhaul for sure. Food was good. The male flight attendant was really nice.

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

The plane was late and then sat on the runway for almost 45 minutes before taking off.

We kept being told that the flight was full and that all overhead compartments were full and therefore had to check in our hand luggage. We were some of the last people to board and noticed that there was still sufficient space in the overhead compartments. We were obliged to check in hand luggage when there was space and so had to wait at luggage retrieval which took a while to then noticed damage to our luggage - not a great experience!

This was an overnight flight. There was no meal service in first class, just a simple snack basket was offered along with beverages. There should have been some type of continental breakfast prior to arrival in PHL. As an Executive Platinum American Airlines Advantage member, I received no name recognition from the first class flight attendant. When disembarking at PHL, the flight attendants were more interested in their cell phones than saying "thank you" to the passengers as they disembarked.

The flight was quick and to the point. The crew just did their job w/o excessive talking and everything was just perfect.

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.

Good crew and a great experience. Only good things to say.

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