$106+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOS
Mar 5 — Mar 121
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
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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 February 3, 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 February 3, 2026.
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/106:37 pm
ONT
- BOS
1 stop10h 36m
United Airlines
Tue 3/174:30 pm
BOS
- ONT
1 stop8h 48m
United Airlines
Deal found 2/3![United Airlines logo]()
$254
This American Airlines deal was found by Cheapflights users on 2/2. 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.
Mon 3/97:59 pm
ONT
- BOS
1 stop6h 35m
American Airlines
Tue 3/174:37 pm
BOS
- ONT
1 stop8h 30m
American Airlines
Deal found 2/2![American Airlines logo]()
$257
This JetBlue deal was found by Cheapflights users on 2/2. 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.
Wed 9/1610:56 pm
ONT
- BOS
1 stop7h 38m
JetBlue
Wed 9/3012:20 pm
BOS
- ONT
1 stop12h 09m
JetBlue
Deal found 2/2![JetBlue logo]()
$259
This American Airlines deal was found by Cheapflights users on 2/3. 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 3/1011:58 pm
ONT
- BOS
2 stops9h 18m
American Airlines
Tue 3/172:40 pm
BOS
- ONT
2 stops10h 27m
American Airlines
Deal found 2/3![American Airlines logo]()
$269
This Alaska Airlines deal was found by Cheapflights users on 2/1. 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.
Wed 2/2512:02 pm
ONT
- BOS
1 stop8h 57m
Alaska Airlines
Mon 3/24:36 pm
BOS
- ONT
1 stop10h 16m
Alaska Airlines
Deal found 2/1![Alaska Airlines logo]()
$278
This Southwest deal was found by Cheapflights users on 2/2. 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.
Wed 2/255:45 pm
ONT
- BOS
2 stops11h 35m
Southwest
Mon 3/25:20 am
BOS
- ONT
1 stop8h 20m
Southwest
Deal found 2/2![Southwest logo]()
$281
This American Airlines deal was found by Cheapflights users on 2/1. 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 2/1711:58 pm
ONT
- BOS
2 stops9h 20m
American Airlines
Sun 2/224:04 pm
BOS
- ONT
1 stop10h 55m
American Airlines
Deal found 2/1![American Airlines logo]()
$283
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Fri 3/66:37 pm
ONT
- BOS
1 stop8h 31m
United Airlines
Mon 3/92:15 pm
BOS
- ONT
2 stops11h 03m
United Airlines
Deal found 2/3![United Airlines logo]()
$291
This JetBlue deal was found by Cheapflights users on 2/2. 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.
Tue 5/2611:25 pm
ONT
- BOS
1 stop7h 55m
JetBlue
Fri 5/291:00 pm
BOS
- ONT
1 stop12h 09m
JetBlue
Deal found 2/2![JetBlue logo]()
$293
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2110:15 pm
ONT
- BOS
1 stop8h 19m
Delta
Thu 4/233:00 pm
BOS
- ONT
1 stop9h 00m
Delta
Deal found 2/1![Delta logo]()
$294
This Delta deal was found by Cheapflights users on 2/1. 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.
Tue 2/1710:20 pm
ONT
- BOS
1 stop8h 42m
Delta
Sun 2/226:37 pm
BOS
- ONT
1 stop8h 12m
Delta
Deal found 2/1![Delta logo]()
$297
Best flights from Ontario to BostonDiscover carefully curated flight deals from Ontario to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 3, 2026.
Discover carefully curated flight deals from Ontario to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 3, 2026.
This United Airlines deal was found by Cheapflights users on 1/31. 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 3/21:50 pm
ONT
- BOS
1 stop7h 59m
United Airlines
Mon 3/94:30 pm
BOS
- ONT
1 stop8h 48m
United Airlines
Deal found 1/31![United Airlines logo]()
$259
This Delta deal was found by Cheapflights users on 2/2. 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.
Tue 4/2112:49 pm
ONT
- BOS
1 stop9h 26m
Delta
Sat 4/253:00 pm
BOS
- ONT
1 stop9h 00m
Delta
Deal found 2/2![Delta logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 2/1. 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.
Thu 2/2612:02 pm
ONT
- BOS
1 stop8h 57m
Alaska Airlines
Fri 2/274:36 pm
BOS
- ONT
1 stop10h 16m
Alaska Airlines
Deal found 2/1![Alaska Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 2/1. 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.
Wed 2/256:50 am
ONT
- BOS
1 stop7h 20m
Southwest
Sun 3/15:00 am
BOS
- ONT
1 stop8h 35m
Southwest
Deal found 2/1![Southwest logo]()
$299
This Delta deal was found by Cheapflights users on 2/1. 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.
Tue 2/1710:20 pm
ONT
- BOS
1 stop8h 42m
Delta
Mon 2/236:37 pm
BOS
- ONT
1 stop8h 12m
Delta
Deal found 2/1![Delta logo]()
$297
This Southwest deal was found by Cheapflights users on 2/2. 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.
Wed 2/255:45 pm
ONT
- BOS
2 stops11h 35m
Southwest
Mon 3/21:35 pm
BOS
- ONT
2 stops10h 45m
Southwest
Deal found 2/2![Southwest logo]()
$326
This Delta deal was found by Cheapflights users on 2/2. 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.
Fri 4/31:20 pm
ONT
- BOS
1 stop7h 39m
Delta
Tue 4/76:15 am
BOS
- ONT
1 stop9h 08m
Delta
Deal found 2/2![Delta logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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.
Thu 3/1212:02 pm
ONT
- BOS
1 stop8h 57m
Alaska Airlines
Tue 3/177:00 am
BOS
- ONT
1 stop11h 08m
Alaska Airlines
Deal found 2/2![Alaska Airlines logo]()
$345
This Delta deal was found by Cheapflights users on 2/1. 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.
Fri 2/273:30 pm
ONT
- BOS
1 stop12h 20m
Delta
Mon 3/26:37 pm
BOS
- ONT
1 stop8h 12m
Delta
Deal found 2/1![Delta logo]()
$297
This Southwest deal was found by Cheapflights users on 1/31. 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.
Thu 3/269:55 pm
ONT
- BOS
2 stops10h 15m
Southwest
Mon 3/305:00 am
BOS
- ONT
1 stop7h 55m
Southwest
Deal found 1/31![Southwest logo]()
$342
This Delta deal was found by Cheapflights users on 2/1. 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.
Mon 2/161:10 pm
ONT
- BOS
1 stop7h 52m
Delta
Wed 2/187:15 am
BOS
- ONT
1 stop9h 39m
Delta
Deal found 2/1![Delta logo]()
$297
Last-minute flights from Ontario to BostonDiscover last-minute flight deals from Ontario to Boston. Data last updated February 3, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Boston. Data last updated February 3, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 2/1. 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 2/1711:58 pm
ONT
- BOS
2 stops9h 20m
American Airlines
Sun 2/224:04 pm
BOS
- ONT
1 stop10h 55m
American Airlines
Deal found 2/1![American Airlines logo]()
$283
This Delta deal was found by Cheapflights users on 2/1. 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.
Tue 2/1710:20 pm
ONT
- BOS
1 stop8h 42m
Delta
Mon 2/236:37 pm
BOS
- ONT
1 stop8h 12m
Delta
Deal found 2/1![Delta logo]()
$297
This Southwest deal was found by Cheapflights users on 2/2. 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.
Wed 2/256:50 am
ONT
- BOS
1 stop7h 20m
Southwest
Mon 3/25:20 am
BOS
- ONT
1 stop8h 20m
Southwest
Deal found 2/2![Southwest logo]()
$259
This Alaska Airlines deal was found by Cheapflights users on 2/1. 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.
Wed 2/2512:02 pm
ONT
- BOS
1 stop8h 57m
Alaska Airlines
Mon 3/24:36 pm
BOS
- ONT
1 stop10h 16m
Alaska Airlines
Deal found 2/1![Alaska Airlines logo]()
$278
This United Airlines deal was found by Cheapflights users on 1/31. 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 3/21:50 pm
ONT
- BOS
1 stop7h 59m
United Airlines
Mon 3/92:15 pm
BOS
- ONT
2 stops11h 03m
United Airlines
Deal found 1/31![United Airlines logo]()
$298
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Fri 3/66:37 pm
ONT
- BOS
1 stop8h 31m
United Airlines
Mon 3/92:15 pm
BOS
- ONT
2 stops11h 03m
United Airlines
Deal found 2/3![United Airlines logo]()
$291
This American Airlines deal was found by Cheapflights users on 2/2. 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.
Mon 3/97:59 pm
ONT
- BOS
1 stop6h 35m
American Airlines
Tue 3/174:37 pm
BOS
- ONT
1 stop8h 30m
American Airlines
Deal found 2/2![American Airlines logo]()
$257
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/106:37 pm
ONT
- BOS
1 stop10h 36m
United Airlines
Tue 3/174:30 pm
BOS
- ONT
1 stop8h 48m
United Airlines
Deal found 2/3![United Airlines logo]()
$254
This American Airlines deal was found by Cheapflights users on 2/3. 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 3/1011:58 pm
ONT
- BOS
2 stops9h 18m
American Airlines
Tue 3/172:40 pm
BOS
- ONT
2 stops10h 27m
American Airlines
Deal found 2/3![American Airlines logo]()
$269
This American Airlines deal was found by Cheapflights users on 2/2. 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 3/1011:58 pm
ONT
- BOS
1 stop8h 56m
American Airlines
Fri 3/134:37 pm
BOS
- ONT
1 stop8h 30m
American Airlines
Deal found 2/2![American Airlines logo]()
$299
One-way flights from Ontario to BostonSearch for one-way flight options from Ontario to Boston. Find affordable one-way fares based on user searches. Data last updated February 3, 2026.
Search for one-way flight options from Ontario to Boston. Find affordable one-way fares based on user searches. Data last updated February 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/38:40 am
ONT
- BOS
3 stops29h 05m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$106
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/38:40 am
ONT
- BOS
2 stops37h 33m
Frontier
Deal found 2/1![Frontier logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:15 am
ONT
- BOS
2 stops25h 14m
Frontier
Deal found 2/3![Frontier logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:15 am
ONT
- BOS
3 stops31h 30m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$121
This United Airlines deal was found by Cheapflights users on 2/2. 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 3/246:37 pm
ONT
- BOS
1 stop10h 36m
United Airlines
Deal found 2/2![United Airlines logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/26:10 am
ONT
- BOS
3 stops31h 35m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$126
This Trip.com deal was found by Cheapflights users on 2/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2112:59 am
ONT
- BOS
1 stop25h 02m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$128
This CheapOair deal was found by Cheapflights users on 2/3. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/312:02 pm
ONT
- BOS
1 stop8h 57m
Alaska Airlines
Deal found 2/3![Alaska Airlines logo]()
$129
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/21:50 pm
ONT
- BOS
1 stop7h 59m
United Airlines
Deal found 2/3![United Airlines logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:17 pm
ONT
- BOS
2 stops26h 56m
Frontier
Deal found 2/3![Frontier logo]()
$131
Find 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 February 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $254 (United Airlines) |
One-way from | $106 (Kiwi.com) |
Popular in | November |
Cheapest in | February |
Average price | $338 |
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 February 3, 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
Mon 3/2
1:50 pm-12:49 am
1 stop7h 59m
Boston Logan Intl
Mon 3/9
4:30 pm-10:18 pm
1 stop8h 48m
$259
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Tue 4/21
12:49 pm-1:15 am
1 stop9h 26m
Boston Logan Intl
Sat 4/25
3:00 pm-9:00 pm
1 stop9h 00m
$297
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Thu 2/26
12:02 pm-11:59 pm
1 stop8h 57m
Boston Logan Intl
Fri 2/27
4:36 pm-11:52 pm
1 stop10h 16m
$297
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Tue 2/17
10:20 pm-10:02 am
1 stop8h 42m
Boston Logan Intl
Mon 2/23
6:37 pm-11:49 pm
1 stop8h 12m
$297
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Fri 4/3
1:20 pm-11:59 pm
1 stop7h 39m
Boston Logan Intl
Tue 4/7
6:15 am-12:23 pm
1 stop9h 08m
$297
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Fri 2/27
3:30 pm-6:50 am
1 stop12h 20m
Boston Logan Intl
Mon 3/2
6:37 pm-11:49 pm
1 stop8h 12m
$297
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Mon 2/16
1:10 pm-12:02 am
1 stop7h 52m
Boston Logan Intl
Wed 2/18
7:15 am-1:54 pm
1 stop9h 39m
$297
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Wed 2/25
6:50 am-5:10 pm
1 stop7h 20m
Boston Logan Intl
Sun 3/1
5:00 am-10:35 am
1 stop8h 35m
$299
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Wed 2/25
5:45 pm-8:20 am
2 stops11h 35m
Boston Logan Intl
Mon 3/2
1:35 pm-9:20 pm
2 stops10h 45m
$326
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Thu 3/26
9:55 pm-11:10 am
2 stops10h 15m
Boston Logan Intl
Mon 3/30
5:00 am-9:55 am
1 stop7h 55m
$342
Showing 1-10 of 22 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 February.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Boston flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
ONT-BOS
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 30, 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 $127). 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 February 3, 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.
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
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 locationsMedford
Cambridge
Hampton Beach
Watertown
Seekonk
Brockton
Seabrook
Cranston
Lincoln
Warwick
Smithfield
Peabody
Quincy
York Beach
Londonderry
Swansea
Old Orchard Beach
Waltham
Lowell
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 February 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$155 | Average$319 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$178 | Average$317 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$266 | Average$417 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$278 | Average$366 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$298 | Average$413 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$311 | Average$444 | FlexibilityNo cancel fee | On-time63% |