$126+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOS
Apr 19 — Apr 261
Round-trip
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 March 20, 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 March 20, 2026.
This CheapOair deal was found by Cheapflights users on 3/17. 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.
Fri 5/17:59 pm
ONT
- BOS
1 stop16h 34m
Alaska Airlines
Tue 5/57:00 am
BOS
- ONT
1 stop10h 32m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$251
This Southwest deal was found by Cheapflights users on 3/18. 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 4/111:20 pm
ONT
- BOS
1 stop7h 30m
Southwest
Wed 4/156:20 am
BOS
- ONT
2 stops10h 10m
Southwest
Deal found 3/18![Southwest logo]()
$256
This Southwest deal was found by Cheapflights users on 3/17. 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 5/411:55 pm
ONT
- BOS
2 stops9h 20m
Southwest
Sat 5/91:50 pm
BOS
- ONT
2 stops10h 30m
Southwest
Deal found 3/17![Southwest logo]()
$261
This United Airlines deal was found by Cheapflights users on 3/17. 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 4/216:05 am
ONT
- BOS
1 stop7h 47m
United Airlines
Wed 4/221:30 pm
BOS
- ONT
1 stop11h 20m
United Airlines
Deal found 3/17![United Airlines logo]()
$271
This American Airlines deal was found by Cheapflights users on 3/17. 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 5/17:35 pm
ONT
- BOS
2 stops10h 52m
American Airlines
Tue 5/54:21 pm
BOS
- ONT
1 stop9h 15m
American Airlines
Deal found 3/17![American Airlines logo]()
$276
This Southwest deal was found by Cheapflights users on 3/17. 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 5/51:55 pm
ONT
- BOS
1 stop7h 10m
Southwest
Tue 5/195:35 am
BOS
- ONT
1 stop7h 40m
Southwest
Deal found 3/17![Southwest logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 3/16. 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 5/110:39 am
ONT
- BOS
1 stop10h 20m
Alaska Airlines
Mon 5/44:33 pm
BOS
- ONT
1 stop10h 26m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$281
This Southwest deal was found by Cheapflights users on 3/16. 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 4/912:50 pm
ONT
- BOS
1 stop9h 00m
Southwest
Mon 4/137:20 am
BOS
- ONT
1 stop10h 55m
Southwest
Deal found 3/16![Southwest logo]()
$287
This Southwest deal was found by Cheapflights users on 3/17. 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 6/92:50 pm
ONT
- BOS
1 stop6h 55m
Southwest
Tue 6/165:00 am
BOS
- ONT
1 stop10h 40m
Southwest
Deal found 3/17![Southwest logo]()
$290
This American Airlines deal was found by Cheapflights users on 3/16. 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 3/245:02 pm
ONT
- BOS
1 stop9h 32m
American Airlines
Mon 3/309:10 am
BOS
- ONT
1 stop10h 12m
American Airlines
Deal found 3/16![American Airlines logo]()
$292
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 March 20, 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 March 20, 2026.
This Alaska Airlines deal was found by Cheapflights users on 3/16. 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 5/510:39 am
ONT
- BOS
1 stop10h 20m
Alaska Airlines
Wed 5/67:00 am
BOS
- ONT
1 stop10h 30m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$251
This Delta deal was found by Cheapflights users on 3/17. 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 9/105:05 pm
ONT
- BOS
1 stop10h 04m
Delta
Sat 9/125:45 am
BOS
- ONT
1 stop8h 19m
Delta
Deal found 3/17![Delta logo]()
$309
This Southwest deal was found by Cheapflights users on 3/19. 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 5/61:55 pm
ONT
- BOS
1 stop7h 10m
Southwest
Fri 5/82:30 pm
BOS
- ONT
2 stops11h 35m
Southwest
Deal found 3/19![Southwest logo]()
$314
This United Airlines deal was found by Cheapflights users on 3/16. 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.
Thu 4/25:10 am
ONT
- BOS
2 stops13h 44m
United Airlines
Wed 4/810:05 am
BOS
- ONT
2 stops15h 26m
United Airlines
Deal found 3/16![United Airlines logo]()
$396
This Southwest deal was found by Cheapflights users on 3/20. 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 4/2011:55 pm
ONT
- BOS
2 stops9h 20m
Southwest
Mon 4/273:45 pm
BOS
- ONT
2 stops10h 20m
Southwest
Deal found 3/20![Southwest logo]()
$319
This Delta deal was found by Cheapflights users on 3/17. 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 6/61:29 pm
ONT
- BOS
1 stop7h 29m
Delta
Tue 6/96:00 am
BOS
- ONT
1 stop9h 29m
Delta
Deal found 3/17![Delta logo]()
$338
This Alaska Airlines deal was found by Cheapflights users on 3/16. 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 5/110:39 am
ONT
- BOS
1 stop10h 20m
Alaska Airlines
Mon 5/44:33 pm
BOS
- ONT
1 stop10h 26m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$340
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 9/106:10 pm
ONT
- BOS
1 stop8h 52m
Alaska Airlines
Tue 9/157:20 am
BOS
- ONT
1 stop10h 27m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$348
This Delta deal was found by Cheapflights users on 3/18. 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 4/105:09 pm
ONT
- BOS
1 stop10h 01m
Delta
Tue 4/1412:45 pm
BOS
- ONT
1 stop11h 15m
Delta
Deal found 3/18![Delta logo]()
$354
This Southwest deal was found by Cheapflights users on 3/16. 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 6/2611:55 pm
ONT
- BOS
2 stops10h 35m
Southwest
Sat 7/116:40 am
BOS
- ONT
1 stop14h 10m
Southwest
Deal found 3/16![Southwest logo]()
$394
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 4/1610:33 am
ONT
- BOS
1 stop10h 26m
Alaska Airlines
Sun 4/267:15 am
BOS
- ONT
1 stop19h 44m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$395
This Alaska Airlines deal was found by Cheapflights users on 3/19. 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 4/1810:33 am
ONT
- BOS
1 stop10h 26m
Alaska Airlines
Tue 4/287:15 am
BOS
- ONT
1 stop29h 24m
Alaska Airlines
Deal found 3/19![Alaska Airlines logo]()
$395
Last-minute flights from Ontario to BostonDiscover last-minute flight deals from Ontario to Boston. Data last updated March 20, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Boston. Data last updated March 20, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 3/16. 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 3/245:02 pm
ONT
- BOS
1 stop9h 32m
American Airlines
Mon 3/309:10 am
BOS
- ONT
1 stop10h 12m
American Airlines
Deal found 3/16![American Airlines logo]()
$292
This Delta deal was found by Cheapflights users on 3/17. 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 3/2410:25 pm
ONT
- BOS
1 stop10h 03m
Delta
Tue 4/76:44 pm
BOS
- ONT
1 stop8h 07m
Delta
Deal found 3/17![Delta logo]()
$300
This American Airlines deal was found by Cheapflights users on 3/16. 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 4/65:02 pm
ONT
- BOS
1 stop9h 32m
American Airlines
Tue 4/73:18 pm
BOS
- ONT
1 stop8h 36m
American Airlines
Deal found 3/16![American Airlines logo]()
$304
This Southwest deal was found by Cheapflights users on 3/16. 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 4/912:50 pm
ONT
- BOS
1 stop9h 00m
Southwest
Mon 4/137:20 am
BOS
- ONT
1 stop10h 55m
Southwest
Deal found 3/16![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 3/20. 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 4/1010:25 pm
ONT
- BOS
1 stop8h 35m
Delta
Tue 4/286:15 am
BOS
- ONT
1 stop8h 59m
Delta
Deal found 3/20![Delta logo]()
$309
This Southwest deal was found by Cheapflights users on 3/18. 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 4/111:20 pm
ONT
- BOS
1 stop7h 30m
Southwest
Wed 4/156:20 am
BOS
- ONT
2 stops10h 10m
Southwest
Deal found 3/18![Southwest logo]()
$256
This Southwest deal was found by Cheapflights users on 3/16. 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 4/209:55 pm
ONT
- BOS
1 stop8h 50m
Southwest
Thu 4/238:45 am
BOS
- ONT
1 stop9h 30m
Southwest
Deal found 3/16![Southwest logo]()
$251
This United Airlines deal was found by Cheapflights users on 3/17. 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 4/216:05 am
ONT
- BOS
1 stop7h 47m
United Airlines
Wed 4/221:30 pm
BOS
- ONT
1 stop11h 20m
United Airlines
Deal found 3/17![United Airlines logo]()
$271
This Delta deal was found by Cheapflights users on 3/17. 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 4/215:05 pm
ONT
- BOS
1 stop9h 55m
Delta
Wed 4/297:37 am
BOS
- ONT
1 stop12h 38m
Delta
Deal found 3/17![Delta logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 3/16. 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 4/3010:39 am
ONT
- BOS
1 stop10h 20m
Alaska Airlines
Wed 5/67:00 am
BOS
- ONT
1 stop10h 30m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$266
This Alaska Airlines deal was found by Cheapflights users on 3/16. 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 4/3010:39 am
ONT
- BOS
1 stop10h 20m
Alaska Airlines
Mon 5/44:33 pm
BOS
- ONT
1 stop10h 26m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$281
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 March 20, 2026.
Search for one-way flight options from Ontario to Boston. Find affordable one-way fares based on user searches. Data last updated March 20, 2026.
This American Airlines deal was found by Cheapflights users on 3/17. 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 4/1512:19 pm
ONT
- BOS
1 stop9h 05m
American Airlines
Deal found 3/17![American Airlines logo]()
$126
This United Airlines deal was found by Cheapflights users on 3/17. 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 4/145:10 am
ONT
- BOS
2 stops11h 54m
United Airlines
Deal found 3/17![United Airlines logo]()
$131
This American Airlines deal was found by Cheapflights users on 3/16. 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 4/212:22 pm
ONT
- BOS
1 stop8h 37m
American Airlines
Deal found 3/16![American Airlines logo]()
$141
This CheapOair deal was found by Cheapflights users on 3/16. 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.
Sat 5/3011:15 am
ONT
- BOS
1 stop16h 05m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$146
This Delta deal was found by Cheapflights users on 3/16. 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 4/95:09 pm
ONT
- BOS
1 stop10h 01m
Delta
Deal found 3/16![Delta logo]()
$149
This United Airlines deal was found by Cheapflights users on 3/20. 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.
Thu 4/306:59 pm
ONT
- BOS
1 stop10h 24m
United Airlines
Deal found 3/20![United Airlines logo]()
$150
This American Airlines deal was found by Cheapflights users on 3/17. 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 5/17:35 pm
ONT
- BOS
2 stops10h 52m
American Airlines
Deal found 3/17![American Airlines logo]()
$151
This Delta deal was found by Cheapflights users on 3/16. 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 3/2410:25 pm
ONT
- BOS
1 stop10h 03m
Delta
Deal found 3/16![Delta logo]()
$152
This Alaska Airlines deal was found by Cheapflights users on 3/18. 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 4/3010:39 am
ONT
- BOS
1 stop10h 20m
Alaska Airlines
Deal found 3/18![Alaska Airlines logo]()
$155
This Delta deal was found by Cheapflights users on 3/16. 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 3/3110:25 pm
ONT
- BOS
1 stop8h 39m
Delta
Deal found 3/16![Delta logo]()
$159
This CheapOair deal was found by Cheapflights users on 3/18. 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.
Thu 4/97:00 am
ONT
- BOS
1 stop19h 53m
Alaska Airlines
Deal found 3/18![Alaska Airlines logo]()
$160
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 March 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $251 (Alaska Airlines) |
One-way from | $126 (American Airlines) |
Popular in | November |
Cheapest in | February |
Average price | $357 |
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 March 20, 2026.
Use the filters below to find and compare flights from Ontario to Boston that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Tue 5/5
10:39 am-11:59 pm
1 stop10h 20m
Boston Logan Intl
Wed 5/6
7:00 am-2:30 pm
1 stop10h 30m
$251
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Thu 9/10
5:05 pm-6:09 am
1 stop10h 04m
Boston Logan Intl
Sat 9/12
5:45 am-11:04 am
1 stop8h 19m
$309
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Wed 5/6
1:55 pm-12:05 am
1 stop7h 10m
Boston Logan Intl
Fri 5/8
2:30 pm-11:05 pm
2 stops11h 35m
$314
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Mon 4/20
11:55 pm-12:15 pm
2 stops9h 20m
Boston Logan Intl
Mon 4/27
3:45 pm-11:05 pm
2 stops10h 20m
$319
Quickest round-trip
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Sat 6/6
1:29 pm-11:58 pm
1 stop7h 29m
Boston Logan Intl
Tue 6/9
6:00 am-12:29 pm
1 stop9h 29m
$338
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Fri 5/1
10:39 am-11:59 pm
1 stop10h 20m
Boston Logan Intl
Mon 5/4
4:33 pm-11:59 pm
1 stop10h 26m
$340
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Thu 9/10
6:10 pm-6:02 am
1 stop8h 52m
Boston Logan Intl
Tue 9/15
7:20 am-2:47 pm
1 stop10h 27m
$348
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Fri 4/10
5:09 pm-6:10 am
1 stop10h 01m
Boston Logan Intl
Tue 4/14
12:45 pm-9:00 pm
1 stop11h 15m
$354
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Fri 6/26
11:55 pm-1:30 pm
2 stops10h 35m
Boston Logan Intl
Sat 7/11
6:40 am-5:50 pm
1 stop14h 10m
$394
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Thu 4/16
10:33 am-11:59 pm
1 stop10h 26m
Boston Logan Intl
Sun 4/26
7:15 am-11:59 pm
1 stop19h 44m
$395
Showing 1-10 of 23 resultsSorted by cheapest first
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 March.
| 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 March 13, 2026.
Booking 40 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, September is the cheapest month in which you can book a flight from Ontario to Boston (average of $140). Flying from Ontario to Boston in July 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 March 20, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited 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.
Boarding
8.1
Food
7.0
Overall
8.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Food
7.0
Overall
8.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Food
7.0
Overall
8.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Food
7.0
Overall
8.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Food
7.0
Overall
8.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Food
7.0
Overall
8.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
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
Concord
Hampton Beach
Watertown
Seekonk
Brockton
Seabrook
Cranston
Chelsea
Smithfield
Lincoln
Warwick
Peabody
Waltham
York Beach
Londonderry
Swansea
Old Orchard Beach
Quincy
Browse thousands of different options on Cheapflights for your next trip
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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.
Other flights to Boston
Explore flights to Boston departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 20, 2026.
Complete your trip
Complete your trip to Boston by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Boston by cabin class
Find flights from Ontario to Boston, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Boston flights
Browse other Ontario and Boston flight options. Last updated on March 20, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on March 20, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 March 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$155 | Average$319 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$158 | Average$328 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$248 | Average$410 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$258 | Average$366 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$292 | Average$406 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$297 | Average$430 | FlexibilityNo cancel fee | On-time63% |