$97+ Cheap flights from Ontario to Boston (ONT - BOS)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOS
Feb 14 — Feb 211
1 adult, Economy
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Find cheap flights from Ontario to Boston with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Boston
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Boston (BOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 15, 2026.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $259 (Southwest) |
One-way from | $97 (Kiwi.com) |
Popular in | November |
Cheapest in | February |
Average price | $369 |
Find flight deals from Ontario to Boston
Cheapest flights from Ontario to BostonExplore the most affordable flight options available from Ontario to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 15, 2026.
Explore the most affordable flight options available from Ontario to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 15, 2026.
This United Airlines deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/178:00 am
ONT
- BOS
1 stop10h 31m
United Airlines
Thu 2/1911:00 am
BOS
- ONT
1 stop9h 41m
United Airlines
Deal found 1/15![United Airlines logo]()
$259
This Southwest deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/179:45 am
ONT
- BOS
1 stop9h 35m
Southwest
Wed 2/255:30 am
BOS
- ONT
2 stops13h 35m
Southwest
Deal found 1/14![Southwest logo]()
$264
This American Airlines deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/76:00 am
ONT
- BOS
2 stops10h 02m
American Airlines
Tue 2/109:45 am
BOS
- ONT
2 stops11h 35m
American Airlines
Deal found 1/14![American Airlines logo]()
$270
This Alaska Airlines deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/3111:53 am
ONT
- BOS
1 stop9h 01m
Alaska Airlines
Tue 2/37:00 am
BOS
- ONT
1 stop11h 08m
Alaska Airlines
Deal found 1/12![Alaska Airlines logo]()
$278
This American Airlines deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/297:30 pm
ONT
- BOS
1 stop7h 02m
American Airlines
Tue 2/172:10 pm
BOS
- ONT
1 stop8h 35m
American Airlines
Deal found 1/15![American Airlines logo]()
$279
This American Airlines deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/49:59 am
ONT
- BOS
2 stops9h 20m
American Airlines
Fri 2/69:45 am
BOS
- ONT
1 stop12h 00m
American Airlines
Deal found 1/12![American Airlines logo]()
$284
This American Airlines deal was found by Cheapflights users on 1/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/49:59 am
ONT
- BOS
2 stops9h 23m
American Airlines
Sun 2/811:21 am
BOS
- ONT
2 stops9h 59m
American Airlines
Deal found 1/13![American Airlines logo]()
$290
This United Airlines deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/186:54 pm
ONT
- BOS
1 stop8h 23m
United Airlines
Sun 5/245:30 am
BOS
- ONT
1 stop9h 50m
United Airlines
Deal found 1/12![United Airlines logo]()
$291
This United Airlines deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/246:30 pm
ONT
- BOS
1 stop8h 28m
United Airlines
Wed 7/83:20 pm
BOS
- ONT
1 stop9h 01m
United Airlines
Deal found 1/14![United Airlines logo]()
$292
This JetBlue deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1811:25 pm
ONT
- BOS
1 stop8h 13m
JetBlue
Thu 5/281:00 pm
BOS
- ONT
1 stop12h 09m
JetBlue
Deal found 1/12![JetBlue logo]()
$293
This Delta deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/53:30 pm
ONT
- BOS
1 stop12h 20m
Delta
Sat 3/149:40 am
BOS
- ONT
1 stop10h 32m
Delta
Deal found 1/14![Delta logo]()
$297
This American Airlines deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/1710:37 pm
ONT
- BOS
1 stop9h 20m
American Airlines
Sun 2/229:39 am
BOS
- ONT
1 stop9h 43m
American Airlines
Deal found 1/14![American Airlines logo]()
$298
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Boston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 15, 2026.
Use the filters below to find and compare flights from Ontario to Boston that are best for you.
Fly from
Ontario
Fly to
Boston
Route
Depart
Return
Price
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Wed 2/4
6:00 am-5:13 pm
1 stop8h 13m
Boston Logan Intl
Fri 2/6
3:25 pm-9:58 pm
1 stop9h 33m
$259
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Tue 2/17
9:45 am-10:20 pm
1 stop9h 35m
Boston Logan Intl
Wed 2/25
5:30 am-10:40 am
1 stop8h 10m
$259
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Wed 2/11
11:53 am-11:54 pm
1 stop9h 01m
Boston Logan Intl
Thu 2/19
4:36 pm-11:52 pm
1 stop10h 16m
$259
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Tue 2/17
8:00 am-9:31 pm
1 stop10h 31m
Boston Logan Intl
Thu 2/19
11:00 am-5:41 pm
1 stop9h 41m
$259
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Tue 2/17
8:00 am-9:31 pm
1 stop10h 31m
Boston Logan Intl
Wed 2/25
6:00 am-12:48 pm
1 stop9h 48m
$259
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Sat 2/7
1:24 pm-11:52 pm
1 stop7h 28m
Boston Logan Intl
Tue 2/10
10:56 am-5:43 pm
1 stop9h 47m
$259
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Wed 2/18
1:15 pm-1:09 am
1 stop8h 54m
Boston Logan Intl
Fri 2/20
7:15 am-1:54 pm
1 stop9h 39m
$297
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Wed 4/1
11:59 am-11:59 pm
1 stop9h 00m
Boston Logan Intl
Sat 4/4
5:15 pm-10:48 pm
1 stop8h 33m
$297
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Wed 2/4
3:30 pm-6:50 am
1 stop12h 20m
Boston Logan Intl
Tue 2/10
7:15 am-1:56 pm
1 stop9h 41m
$297
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Wed 2/25
12:02 pm-11:59 pm
1 stop8h 57m
Boston Logan Intl
Fri 2/27
4:36 pm-11:52 pm
1 stop10h 16m
$299
Showing 1-10 of 21 results
Compare providers for flights from Ontario to Boston
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Boston in January.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Boston flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Boston flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Boston flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Boston flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Boston flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Boston
Have a flexible travel schedule? Discover the best time to fly to Boston from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Boston
How far ahead should I book a flight from Ontario to Boston?
Use this chart to determine the optimal time to book a round-trip flight from Ontario to Boston. Price data was last updated on January 9, 2026.
Booking 24 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Boston. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Ontario to Boston?
Currently, March is the cheapest month in which you can book a flight from Ontario to Boston (average of $124). Flying from Ontario to Boston in May is currently the most expensive (average of $188). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Reviews of airlines servicing Boston
Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated January 15, 2026.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Ontario to Boston by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Related info for your journey
Find useful and relevant information for your journey from Ontario to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Boston?
Book flights to Boston if you plan to visit one of these locationsCambridge
Medford
Hampton Beach
Watertown
Seekonk
Brockton
Warwick
Seabrook
Cranston
Lincoln
Lowell
Smithfield
Peabody
Quincy
York Beach
Londonderry
Swansea
Old Orchard Beach
Waltham
Chelsea
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Alternative routes for Ontario to Boston
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from Ontario to Boston
Discover the top 6 airlines that operate flights from Ontario to Boston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$155 | Average$319 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$178 | Average$323 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$266 | Average$419 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$278 | Average$366 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$298 | Average$411 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$311 | Average$441 | FlexibilityNo cancel fee | On-time63% |