$153+ Cheap flights from Boston to Ontario (BOS - ONT)
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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — ONT
Aug 29 — Sep 51
Round-trip
1 adult, Economy
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Find cheap flights from Boston to Ontario 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 Boston to OntarioExplore the most affordable flight options available from Boston to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2026.
Explore the most affordable flight options available from Boston to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2026.
This United Airlines deal was found by Cheapflights users on 7/26. 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 9/116:00 am
BOS
- ONT
1 stop9h 12m
United Airlines
Sun 9/137:13 pm
ONT
- BOS
1 stop10h 01m
United Airlines
Deal found 7/26![United Airlines logo]()
$342
This Mytrip deal was found by Cheapflights users on 7/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:42 pm
BOS
- ONT
1 stop19h 09m
Alaska Airlines
Sat 9/57:12 am
ONT
- BOS
1 stop19h 57m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$346
This Delta deal was found by Cheapflights users on 7/27. 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.
Sat 11/76:05 am
BOS
- ONT
1 stop9h 17m
Delta
Sat 12/51:25 pm
ONT
- BOS
1 stop7h 34m
Delta
Deal found 7/27![Delta logo]()
$347
This Delta deal was found by Cheapflights users on 7/27. 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 8/274:25 pm
BOS
- ONT
1 stop8h 27m
Delta
Sat 9/57:05 am
ONT
- BOS
1 stop9h 30m
Delta
Deal found 7/27![Delta logo]()
$348
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Fri 8/286:45 am
BOS
- ONT
1 stop7h 58m
American Airlines
Sun 9/68:01 pm
ONT
- BOS
1 stop6h 46m
American Airlines
Deal found 7/28![American Airlines logo]()
$349
This Southwest deal was found by Cheapflights users on 7/28. 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 8/253:20 pm
BOS
- ONT
2 stops9h 40m
Southwest
Tue 9/111:55 pm
ONT
- BOS
1 stop9h 20m
Southwest
Deal found 7/28![Southwest logo]()
$352
This Delta deal was found by Cheapflights users on 7/29. 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 8/2812:20 pm
BOS
- ONT
1 stop9h 10m
Delta
Sat 9/512:00 pm
ONT
- BOS
1 stop9h 38m
Delta
Deal found 7/29![Delta logo]()
$357
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Fri 9/46:30 am
BOS
- ONT
1 stop8h 33m
American Airlines
Sun 9/1312:37 pm
ONT
- BOS
1 stop8h 53m
American Airlines
Deal found 7/28![American Airlines logo]()
$358
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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.
Fri 9/117:12 am
BOS
- ONT
1 stop10h 04m
Alaska Airlines
Fri 9/116:14 pm
ONT
- BOS
1 stop8h 55m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$361
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Sat 8/295:45 am
BOS
- ONT
2 stops10h 05m
United Airlines
Sun 8/306:00 am
ONT
- BOS
1 stop8h 29m
United Airlines
Deal found 7/29![United Airlines logo]()
$362
This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/165:42 pm
BOS
- ONT
1 stop19h 09m
Alaska Airlines
Sun 9/206:14 pm
ONT
- BOS
1 stop8h 55m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$367
Best flights from Boston to OntarioDiscover carefully curated flight deals from Boston to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 30, 2026.
Discover carefully curated flight deals from Boston to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 30, 2026.
This Southwest deal was found by Cheapflights users on 7/29. 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 8/269:25 am
BOS
- ONT
2 stops9h 40m
Southwest
Wed 9/97:25 am
ONT
- BOS
2 stops11h 05m
Southwest
Deal found 7/29![Southwest logo]()
$367
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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 9/129:33 am
BOS
- ONT
1 stop10h 45m
Alaska Airlines
Sun 9/136:14 pm
ONT
- BOS
1 stop8h 55m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$376
This Delta deal was found by Cheapflights users on 7/28. 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 10/206:05 am
BOS
- ONT
1 stop9h 16m
Delta
Tue 10/271:24 pm
ONT
- BOS
1 stop7h 35m
Delta
Deal found 7/28![Delta logo]()
$413
This JetBlue deal was found by Cheapflights users on 7/28. 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.
Sat 8/2912:44 pm
BOS
- ONT
1 stop12h 15m
JetBlue
Tue 9/111:59 pm
ONT
- BOS
1 stop8h 34m
JetBlue
Deal found 7/28![JetBlue logo]()
$430
This Southwest deal was found by Cheapflights users on 7/27. 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 8/184:45 pm
BOS
- ONT
1 stop8h 15m
Southwest
Sat 8/2211:55 pm
ONT
- BOS
1 stop8h 30m
Southwest
Deal found 7/27![Southwest logo]()
$388
This JetBlue deal was found by Cheapflights users on 7/29. 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.
Thu 10/11:10 pm
BOS
- ONT
1 stop10h 47m
JetBlue
Sat 10/1011:05 pm
ONT
- BOS
1 stop8h 41m
JetBlue
Deal found 7/29![JetBlue logo]()
$433
This Southwest deal was found by Cheapflights users on 7/29. 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 9/163:20 pm
BOS
- ONT
2 stops9h 45m
Southwest
Sun 9/202:05 pm
ONT
- BOS
1 stop7h 40m
Southwest
Deal found 7/29![Southwest logo]()
$398
This Alaska Airlines deal was found by Cheapflights users on 7/25. 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.
Sun 9/137:59 pm
BOS
- ONT
2 stops23h 11m
Alaska Airlines
Sat 9/1910:47 am
ONT
- BOS
1 stop16h 22m
Alaska Airlines
Deal found 7/25![Alaska Airlines logo]()
$444
This Southwest deal was found by Cheapflights users on 7/27. 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.
Fri 9/255:40 am
BOS
- ONT
1 stop7h 40m
Southwest
Sun 9/278:30 pm
ONT
- BOS
2 stops10h 15m
Southwest
Deal found 7/27![Southwest logo]()
$398
This Southwest deal was found by Cheapflights users on 7/25. 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.
Sat 9/2612:10 pm
BOS
- ONT
2 stops11h 05m
Southwest
Sun 10/119:45 am
ONT
- BOS
1 stop12h 00m
Southwest
Deal found 7/25![Southwest logo]()
$407
This Southwest deal was found by Cheapflights users on 7/29. 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.
Mon 1/187:15 am
BOS
- ONT
2 stops10h 10m
Southwest
Fri 1/226:45 am
ONT
- BOS
2 stops8h 40m
Southwest
Deal found 7/29![Southwest logo]()
$418
Last-minute flights from Boston to OntarioDiscover last-minute flight deals from Boston to Ontario. Data last updated July 30, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Ontario. Data last updated July 30, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 7/25. 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 8/188:30 am
BOS
- ONT
1 stop13h 25m
Southwest
Sat 8/2211:55 pm
ONT
- BOS
1 stop8h 30m
Southwest
Deal found 7/25![Southwest logo]()
$372
This Delta deal was found by Cheapflights users on 7/29. 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 8/2112:20 pm
BOS
- ONT
1 stop9h 10m
Delta
Sun 8/3010:00 pm
ONT
- BOS
1 stop8h 39m
Delta
Deal found 7/29![Delta logo]()
$367
This Southwest deal was found by Cheapflights users on 7/28. 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 8/253:20 pm
BOS
- ONT
2 stops9h 40m
Southwest
Tue 9/111:55 pm
ONT
- BOS
1 stop9h 20m
Southwest
Deal found 7/28![Southwest logo]()
$352
This Booking.com deal was found by Cheapflights users on 7/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:42 pm
BOS
- ONT
1 stop19h 09m
Alaska Airlines
Mon 8/317:12 am
ONT
- BOS
1 stop19h 57m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$375
This Mytrip deal was found by Cheapflights users on 7/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:42 pm
BOS
- ONT
1 stop19h 09m
Alaska Airlines
Sat 9/57:12 am
ONT
- BOS
1 stop19h 57m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$346
This Delta deal was found by Cheapflights users on 7/27. 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 8/271:55 pm
BOS
- ONT
1 stop10h 57m
Delta
Sat 9/57:05 am
ONT
- BOS
1 stop9h 30m
Delta
Deal found 7/27![Delta logo]()
$347
This Delta deal was found by Cheapflights users on 7/25. 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 8/273:14 pm
BOS
- ONT
1 stop9h 38m
Delta
Tue 9/11:06 pm
ONT
- BOS
1 stop7h 51m
Delta
Deal found 7/25![Delta logo]()
$373
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Fri 8/286:45 am
BOS
- ONT
1 stop7h 58m
American Airlines
Sun 9/68:01 pm
ONT
- BOS
1 stop6h 46m
American Airlines
Deal found 7/28![American Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 7/29. 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 8/2812:20 pm
BOS
- ONT
1 stop9h 10m
Delta
Sat 9/512:00 pm
ONT
- BOS
1 stop9h 38m
Delta
Deal found 7/29![Delta logo]()
$357
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Sat 8/295:45 am
BOS
- ONT
2 stops10h 05m
United Airlines
Sun 8/306:00 am
ONT
- BOS
1 stop8h 29m
United Airlines
Deal found 7/29![United Airlines logo]()
$362
One-way flights from Boston to OntarioSearch for one-way flight options from Boston to Ontario. Find affordable one-way fares based on user searches. Data last updated July 30, 2026.
Search for one-way flight options from Boston to Ontario. Find affordable one-way fares based on user searches. Data last updated July 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/2612:45 pm
BOS
- ONT
2 stops24h 44m
Frontier
Deal found 7/27![Frontier logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
Thu 9/1011:17 am
BOS
- ONT
2 stops15h 30m
Frontier
Deal found 7/29![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
Fri 9/1112:54 pm
BOS
- ONT
2 stops24h 36m
Frontier
Deal found 7/29![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/1711:59 am
BOS
- ONT
2 stops38h 51m
Frontier
Deal found 7/28![Frontier logo]()
$171
This Delta deal was found by Cheapflights users on 7/28. 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 8/281:55 pm
BOS
- ONT
1 stop10h 57m
Delta
Deal found 7/28![Delta logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 7/25. 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.
Sun 8/3012:45 pm
BOS
- ONT
2 stops24h 19m
Frontier
Deal found 7/25![Frontier logo]()
$175
This Booking.com deal was found by Cheapflights users on 7/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/25:42 pm
BOS
- ONT
1 stop19h 09m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$179
This Mytrip deal was found by Cheapflights users on 7/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/79:00 am
BOS
- ONT
1 stop10h 58m
Alaska Airlines
Deal found 7/28![Alaska Airlines logo]()
$183
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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.
Tue 9/159:33 am
BOS
- ONT
1 stop10h 45m
Alaska Airlines
Deal found 7/28![Alaska Airlines logo]()
$184
This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:59 pm
BOS
- ONT
1 stop18h 05m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$189
This Delta deal was found by Cheapflights users on 7/25. 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 8/144:25 pm
BOS
- ONT
1 stop8h 27m
Delta
Deal found 7/25![Delta logo]()
$194
Find flight deals from Boston to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Ontario (ONT). 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 July 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $342 (United Airlines) |
One-way from | $153 (Kiwi.com) |
Popular in | December |
Cheapest in | February |
Average price | $606 |
Cheapflights Fare Finder
Customize your flight search to find flights from Boston to Ontario 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 July 30, 2026.
Use the filters below to find and compare flights from Boston to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Wed 8/26
9:25 am-4:05 pm
2 stops9h 40m
Ontario
Wed 9/9
7:25 am-9:30 pm
2 stops11h 05m
$367
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Sat 9/12
9:33 am-5:18 pm
1 stop10h 45m
Ontario
Sun 9/13
6:14 pm-6:09 am
1 stop8h 55m
$376
Quickest round-trip
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Tue 8/18
4:45 pm-10:00 pm
1 stop8h 15m
Ontario
Sat 8/22
11:55 pm-11:25 am
1 stop8h 30m
$388
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Wed 9/16
3:20 pm-10:05 pm
2 stops9h 45m
Ontario
Sun 9/20
2:05 pm-12:45 am
1 stop7h 40m
$398
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Fri 9/25
5:40 am-10:20 am
1 stop7h 40m
Ontario
Sun 9/27
8:30 pm-9:45 am
2 stops10h 15m
$398
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Sat 9/26
12:10 pm-8:15 pm
2 stops11h 05m
Ontario
Sun 10/11
9:45 am-12:45 am
1 stop12h 00m
$407
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Tue 10/20
6:05 am-12:21 pm
1 stop9h 16m
Ontario
Tue 10/27
1:24 pm-11:59 pm
1 stop7h 35m
$413
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Mon 1/18
7:15 am-2:25 pm
2 stops10h 10m
Ontario
Fri 1/22
6:45 am-6:25 pm
2 stops8h 40m
$418
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Sat 8/29
12:44 pm-9:59 pm
1 stop12h 15m
Ontario
Tue 9/1
11:59 pm-11:33 am
1 stop8h 34m
$430
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Thu 10/1
1:10 pm-8:57 pm
1 stop10h 47m
Ontario
Sat 10/10
11:05 pm-10:46 am
1 stop8h 41m
$433
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Boston to Ontario
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 Boston to Ontario in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Boston-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Boston-Ontario 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 Boston-Ontario 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 Boston to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Boston with our price prediction graph.
BOS-ONT
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 Boston to Ontario
How far ahead should I book a flight from Boston to Ontario?
The price you pay for your flight from Boston to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 60 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Boston to Ontario?
Currently, February is the cheapest month in which you can book a flight from Boston to Ontario (average of $317). Flying from Boston to Ontario in December is currently the most expensive (average of $881). 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.
How much does it cost to fly round-trip from Boston to Ontario?
Airfare is below average for this route at the moment.
Boston to Ontario flights typically cost between $358 and $756 in September.The cheapest round-trip price found within the last 5 days was $342 on United Airlines (Sep 11-Sep 13).
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated July 30, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited Airlines from Boston to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from Boston to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 30, 2026.
Boston and Ontario flights
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Top 5 airlines flying from Boston to Ontario
Discover the top 5 airlines that operate flights from Boston to Ontario. 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 July 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$233 | Average$557 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$239 | Average$487 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$258 | Average$441 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$298 | Average$687 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$307 | Average$484 | FlexibilityNo cancel fee | On-time63% |