ONT - BOS

$133 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 9/1. 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
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Boston

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Boston, 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 Boston, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$292
Typical prices: $402-$306
United Airlines
Sat 9/12Sun 9/20
ONT - BOS • 1 stop
Cheapest one-way
$133
Typical prices: $189-$319
Frontier
Tue 9/1
ONT - BOS • 2 stops
Top airlines
Cheapest • from $292 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Boston. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $312 (round-trip)
Shortest trip • 7h 11m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 19% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 19% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Boston (ONT-BOS)

 
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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Boston

Sat, Sep 12 - Sun, Sep 20
United Airlines Logo
7:13 pm - 8:01 am
ONT
-
BOS
9h 48m
1 stop
United Airlines Logo
6:00 am - 12:12 pm
BOS
-
ONT
9h 12m
1 stop
$292United Airlines
Thu, May 28 - Wed, Jun 3
Delta Logo
4:57 pm - 6:20 am
ONT
-
BOS
10h 23m
1 stop
Delta Logo
6:45 pm - 11:34 pm
BOS
-
ONT
7h 49m
1 stop
$297Delta
Sat, May 23 - Fri, May 29
American Airlines Logo
10:00 pm - 9:22 am
ONT
-
BOS
8h 22m
1 stop
American Airlines Logo
6:20 am - 12:05 pm
BOS
-
ONT
8h 45m
1 stop
$298American Airlines
Fri, May 29 - Tue, Jun 2
American Airlines Logo
12:40 pm - 12:04 am
ONT
-
BOS
8h 24m
1 stop
American Airlines Logo
11:20 am - 6:22 pm
BOS
-
ONT
10h 02m
2 stops
$302American Airlines
Sat, Jun 6 - Fri, Jun 12
Southwest Logo
9:50 am - 11:35 pm
ONT
-
BOS
10h 45m
2 stops
Southwest Logo
7:55 am - 3:05 pm
BOS
-
ONT
10h 10m
2 stops
$307Southwest
Fri, Oct 2 - Sat, Oct 31
Delta Logo
5:05 pm - 6:09 am
ONT
-
BOS
10h 04m
1 stop
Delta Logo
6:25 pm - 11:48 pm
BOS
-
ONT
8h 23m
1 stop
$318Delta
Mon, Jun 29 - Tue, Jul 7
Southwest Logo
11:55 pm - 12:15 pm
ONT
-
BOS
9h 20m
1 stop
Southwest Logo
5:25 am - 12:05 pm
BOS
-
ONT
9h 40m
1 stop
$323Southwest
Wed, Jul 22 - Tue, Jul 28
Southwest Logo
1:20 pm - 12:45 am
ONT
-
BOS
8h 25m
1 stop
Southwest Logo
5:25 am - 12:05 pm
BOS
-
ONT
9h 40m
1 stop
$324Southwest
Mon, May 18 - Sun, May 24
American Airlines Logo
11:29 pm - 12:44 pm
ONT
-
BOS
10h 15m
1 stop
American Airlines Logo
6:20 am - 12:05 pm
BOS
-
ONT
8h 45m
1 stop
$327American Airlines
Sat, Jul 4 - Tue, Nov 10
Southwest Logo
6:00 am - 8:25 pm
ONT
-
BOS
11h 25m
1 stop
Southwest Logo
12:50 pm - 8:35 pm
BOS
-
ONT
10h 45m
2 stops
$329Southwest
Booking Insights

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.

How much is a round-trip flight from Ontario to Boston?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Ontario to Boston departing in September.

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 February, where tickets cost $331 (return) on average. On the other hand, the most expensive months are November and December, where the average cost of round-trip tickets is $506 and $498 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 2 weeks before departure, which saves you about 19% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$133
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 3% 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 $133 for a one-way ticket and $292 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?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Ontario and Boston, with SkyTeam 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 $435 and an overall rating of 7.9, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $360 and an overall rating of 7.9.

  • 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.

Reviews of the 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.
7.9
SouthwestOverall score based on 4307 reviews
7.5Entertainment
8.1Boarding
8.6Crew
7.0Food
8.0Comfort
Airline reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

10.0 Excellentlarry, Apr 2026
LGB - PHX
Read more Southwest reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

It was good from LAX to Phoenix, But the connection in Phoenix to Tulsa was not that great. The staff on both flights were great. The choice of free entertainment was ok nothing to brag about. The 45 min delay because of some electrical issue wasn't great from Phoenix to Tulsa. We sat there with hardly any air, The seat I had was between windows so the side of the plane pushed in on you. My being a bigger man it then made the seating area uncomfortable. The seats on the plane had no power to connect to recharge your phone or anything. I would recommend that they should look into a slot or clamp to hold your phone to enjoy while watching the entertainment choices hands-free. Also make it possible to raise the inner seat by the window be able to raise the arm rest up to make more room for larger people to set more comfortably. I would also say other then that stop price gouging the airfare or nickel and diming everything. Not fair for people having to fly for emergencies and be paying for higher prices due to the season or holidays. Your making your money either way and the cost of flying is still going to be the same regardless if there's 100 people or 200 people.

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

My flight yesterday evening was delayed 3.5 hours with no water or food service. Poor experience

The tray table was broken and the food was terrible.

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

N Everything was perfect from boarding to assistance to baggage in Tampa

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

Flight delayed. Air broken. Cabin was hot enough to pass out. Delta shuttle’s becoming worse and worse.

Fast, lovely scenery, great info on the Delta flight screen about landmarks we were flying over. Great landing!

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I took seat 15A in anticipation of window seat, there is no window.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Super friendly with lots of drink options an entertainment. Friendly crew.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

It was perfect! I've never flown with United before, but I definitely will in the future

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

They delayed the flight from 9:00 to 11:55 At 11:45 they canceled the flight. I paid a premium price for the tickets with poor service

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

OK, we were delayed and had to de plane and reboard.

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

Boarding gate at LAX was too crowded—two gates next to one another

On time departure and early arrival. Flight attendant very nice.

The SFO Lounge crew were amazing. The bartender Faris was great. Thanks!

Was not able to do a online check-in because the American Airlines system doesn't store our visa or other passport information, allowing us to have a trouble-free check-in. We were forced to have to check-in at the counter which Changes are upgrade status given that we were not able to check in much earlier.

Same plane as RDU to LGA — internet not working. Pilot issue of some sort at end of prior flight - I was on same plane for my connection. Late/delayed —

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

We left at 1030 am pacific from LA and supposed to land at 7 pm Eastern in NY. They made a detour, stopped in Philadelphia and didn’t land till 1130 PM Eastern!!! Worst flight experience with no pilot communication with no explanation as to what was going on. Everyone was very frustrated to say the least.

Flight boarded from Gate 159B, the farthest gate in the LAX Bradley Terminal. While the flight operated on time, the first class cabin attendant made no recognition of my being an Advantage Executive Platinum member.

The flight itself was excellent but the gate attendant made me check my carryon since she said it was an inch too big. I’ve had no problems with this carryon on recent flights on Qantas, Delta, Austrian, Southwest Airlines even though the overhead bins are the same size. there were other carryons in the bins that also looked larger than mine and there was room left in the bins for more. When I picked up my carryon from baggage claim one of the wheels had broken off.

There was a screen but no earphones that could use the older input so I could listen to anything.

Jet blue just had great service overall! Only a little turbulence heading out of Austin, otherwise the jet stream helped the speed of the trip!

Boarding was quick and efficient. The flight crew were friendly. There were limited food options available on the flight. The pocket guide said there would be salad and sandwich sections available on flights over 3.5 hours. The only food available were snack boxes. And those were limited as well. My flight was over 5 hours. The entertainment system worked well. I had both extra legroom seats and regular coach seats. The seats were not very comfortable. The entertainment controls in the armrest made it difficult to rest my arm without changing the channel on my neighbors TV. Overall, my experience was mediocre.

Boarding was fast, easy, and we landed early. The entertainment system was very buggy and kept resetting throughout the flight.

I purchased ticket so our daughter ( a minor) can sit next to her mother. No help at gate after kayak insisted that this could be done. She ended sitting by herself

Terrible. There was a lot of misleading information regarding ticketing, seat upgrades, & boarding group. I also expect my seat will recline. I have back problems & it is very painful for me of the seat doesn’t recline. In addition, when I choose a fare that allows me a carry-on bag, I expect to be able to carry it on. Not be forced to check it. Thos happened on my flight to MCO & back to Boston. Not sure I will ever fly JetBlue again. Further I bought the ticket through hat deal. I will NEVER do that again. They were incapable of providing an accurate record locator # for either leg of the trip. I had to call them before each flight with me VERY stressed about whether I would actually be able to get on my flight. Who does that? Who books flight & then FAILS to give an accurate record locator? Twice!

Jet Blue has excellent everything, Friendly customer service and staff, clean aircraft’s and is always on time.

Entertainment and wifi were very sub-par - audio issues and no wifi

They forced me to check my hand luggage at the gate.

Still hasn’t left. Why are you asking how it was?

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

Information on your arrival and departure airports