$126+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — ONT
Apr 14 — Apr 211
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Boston to Ontario
Cheapest
Best
Last-minute
One-way
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 March 15, 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 March 15, 2026.
This SmartFares deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/277:00 am
BOS
- ONT
1 stop10h 32m
Alaska Airlines
Tue 5/510:39 am
ONT
- BOS
1 stop10h 20m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$248
This Southwest deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/238:45 am
BOS
- ONT
1 stop9h 30m
Southwest
Wed 4/299:55 pm
ONT
- BOS
1 stop7h 10m
Southwest
Deal found 3/13![Southwest logo]()
$251
This American Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/26:13 am
BOS
- ONT
1 stop8h 21m
American Airlines
Fri 5/87:35 pm
ONT
- BOS
1 stop7h 25m
American Airlines
Deal found 3/11![American Airlines logo]()
$253
This Southwest deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:20 am
BOS
- ONT
2 stops10h 10m
Southwest
Tue 4/211:55 pm
ONT
- BOS
1 stop7h 10m
Southwest
Deal found 3/13![Southwest logo]()
$256
This Southwest deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/273:45 pm
BOS
- ONT
2 stops10h 20m
Southwest
Mon 5/411:55 pm
ONT
- BOS
2 stops9h 20m
Southwest
Deal found 3/13![Southwest logo]()
$261
This Vliegwinkel deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/25:05 pm
BOS
- ONT
1 stop9h 43m
Alaska Airlines
Sat 5/910:39 am
ONT
- BOS
1 stop10h 20m
Alaska Airlines
Deal found 3/14![Alaska Airlines logo]()
$263
This Alaska Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:00 am
BOS
- ONT
1 stop10h 30m
Alaska Airlines
Mon 5/1110:39 am
ONT
- BOS
1 stop10h 20m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$266
This Southwest deal was found by Cheapflights users on 3/11. 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 5/235:15 am
BOS
- ONT
1 stop7h 35m
Southwest
Fri 6/512:50 pm
ONT
- BOS
1 stop9h 10m
Southwest
Deal found 3/11![Southwest logo]()
$277
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 March 15, 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 March 15, 2026.
This Alaska Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/44:33 pm
BOS
- ONT
1 stop10h 26m
Alaska Airlines
Thu 5/710:39 am
ONT
- BOS
1 stop10h 20m
Alaska Airlines
Deal found 3/14![Alaska Airlines logo]()
$281
This Southwest deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/238:45 am
BOS
- ONT
1 stop9h 30m
Southwest
Wed 4/296:15 am
ONT
- BOS
2 stops9h 20m
Southwest
Deal found 3/14![Southwest logo]()
$314
This Delta deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:10 am
BOS
- ONT
1 stop9h 09m
Delta
Sat 5/305:55 pm
ONT
- BOS
1 stop9h 25m
Delta
Deal found 3/12![Delta logo]()
$317
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/96:00 am
BOS
- ONT
1 stop9h 22m
United Airlines
Mon 5/116:59 pm
ONT
- BOS
1 stop10h 24m
United Airlines
Deal found 3/12![United Airlines logo]()
$346
This Delta deal was found by Cheapflights users on 3/10. 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 4/253:00 pm
BOS
- ONT
1 stop9h 00m
Delta
Mon 5/410:15 pm
ONT
- BOS
1 stop10h 20m
Delta
Deal found 3/10![Delta logo]()
$340
This United Airlines deal was found by Cheapflights users on 3/10. 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 4/25:30 am
BOS
- ONT
1 stop9h 50m
United Airlines
Thu 4/91:27 pm
ONT
- BOS
1 stop8h 38m
United Airlines
Deal found 3/10![United Airlines logo]()
$351
This Alaska Airlines deal was found by Cheapflights users on 3/10. 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 3/259:00 am
BOS
- ONT
1 stop12h 13m
Alaska Airlines
Tue 4/710:33 am
ONT
- BOS
1 stop10h 26m
Alaska Airlines
Deal found 3/10![Alaska Airlines logo]()
$353
This United Airlines deal was found by Cheapflights users on 3/10. 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 5/57:21 am
BOS
- ONT
2 stops16h 15m
United Airlines
Wed 5/66:59 pm
ONT
- BOS
1 stop10h 24m
United Airlines
Deal found 3/10![United Airlines logo]()
$352
This Alaska Airlines deal was found by Cheapflights users on 3/11. 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.
Mon 4/277:00 am
BOS
- ONT
1 stop10h 32m
Alaska Airlines
Tue 5/510:39 am
ONT
- BOS
1 stop10h 20m
Alaska Airlines
Deal found 3/11![Alaska Airlines logo]()
$353
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/279:30 am
BOS
- ONT
2 stops14h 12m
United Airlines
Sat 5/306:30 am
ONT
- BOS
1 stop10h 00m
United Airlines
Deal found 3/12![United Airlines logo]()
$356
This United Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:37 pm
BOS
- ONT
1 stop11h 18m
United Airlines
Mon 6/16:30 pm
ONT
- BOS
2 stops12h 50m
United Airlines
Deal found 3/14![United Airlines logo]()
$376
Last-minute flights from Boston to OntarioDiscover last-minute flight deals from Boston to Ontario. Data last updated March 15, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Ontario. Data last updated March 15, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/2512:35 pm
BOS
- ONT
1 stop9h 34m
American Airlines
Wed 4/15:02 pm
ONT
- BOS
1 stop9h 32m
American Airlines
Deal found 3/14![American Airlines logo]()
$292
This United Airlines deal was found by Cheapflights users on 3/11. 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 3/271:45 pm
BOS
- ONT
1 stop12h 12m
United Airlines
Fri 4/31:43 pm
ONT
- BOS
1 stop7h 16m
United Airlines
Deal found 3/11![United Airlines logo]()
$266
This Delta deal was found by Cheapflights users on 3/11. 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 3/316:44 pm
BOS
- ONT
1 stop8h 07m
Delta
Wed 4/81:20 pm
ONT
- BOS
1 stop7h 39m
Delta
Deal found 3/11![Delta logo]()
$297
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1412:55 pm
BOS
- ONT
1 stop10h 40m
Southwest
Tue 4/211:55 pm
ONT
- BOS
1 stop7h 10m
Southwest
Deal found 3/15![Southwest logo]()
$251
This Southwest deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/225:35 am
BOS
- ONT
1 stop7h 40m
Southwest
Mon 4/279:55 pm
ONT
- BOS
1 stop8h 50m
Southwest
Deal found 3/14![Southwest logo]()
$287
This SmartFares deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/277:00 am
BOS
- ONT
1 stop10h 32m
Alaska Airlines
Tue 5/510:39 am
ONT
- BOS
1 stop10h 20m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$248
This Southwest deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/273:45 pm
BOS
- ONT
2 stops10h 20m
Southwest
Mon 5/411:55 pm
ONT
- BOS
2 stops9h 20m
Southwest
Deal found 3/13![Southwest logo]()
$261
This Alaska Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/297:00 am
BOS
- ONT
1 stop10h 32m
Alaska Airlines
Sat 5/910:39 am
ONT
- BOS
1 stop10h 20m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$281
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 March 15, 2026.
Search for one-way flight options from Boston to Ontario. Find affordable one-way fares based on user searches. Data last updated March 15, 2026.
This Alaska Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/77:00 am
BOS
- ONT
1 stop10h 32m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$126
This American Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/511:11 am
BOS
- ONT
2 stops10h 13m
American Airlines
Deal found 3/13![American Airlines logo]()
$131
This Alaska Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/137:20 am
BOS
- ONT
1 stop10h 49m
Alaska Airlines
Deal found 3/14![Alaska Airlines logo]()
$140
This Alaska Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/304:33 pm
BOS
- ONT
1 stop10h 26m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$141
This Delta deal was found by Cheapflights users on 3/11. 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 3/305:35 am
BOS
- ONT
1 stop9h 12m
Delta
Deal found 3/11![Delta logo]()
$149
This Alaska Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:00 am
BOS
- ONT
1 stop10h 30m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$150
This Super.com deal was found by Cheapflights users on 3/11. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/202:05 pm
BOS
- ONT
1 stop11h 04m
JetBlue
Deal found 3/11![JetBlue logo]()
$151
This Delta deal was found by Cheapflights users on 3/11. 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.
Sun 3/2210:20 am
BOS
- ONT
1 stop9h 08m
Delta
Deal found 3/11![Delta logo]()
$152
This JetBlue deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/192:55 pm
BOS
- ONT
1 stop10h 14m
JetBlue
Deal found 3/13![JetBlue logo]()
$154
This JetBlue deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/142:55 pm
BOS
- ONT
1 stop10h 14m
JetBlue
Deal found 3/14![JetBlue logo]()
$155
This CheapOair deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/33:55 pm
BOS
- ONT
1 stop9h 45m
JetBlue
Deal found 3/14![JetBlue logo]()
$156
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/246:10 am
BOS
- ONT
1 stop9h 09m
Delta
Deal found 3/13![Delta logo]()
$158
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 March 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $248 (SmartFares) |
One-way from | $126 (Alaska Airlines) |
Popular in | December |
Cheapest in | February |
Average price | $426 |
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 March 15, 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
Mon 5/4
4:33 pm-11:59 pm
1 stop10h 26m
Ontario
Thu 5/7
10:39 am-11:59 pm
1 stop10h 20m
$281
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Thu 4/23
8:45 am-3:15 pm
1 stop9h 30m
Ontario
Wed 4/29
6:15 am-6:35 pm
2 stops9h 20m
$314
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Wed 5/27
6:10 am-12:19 pm
1 stop9h 09m
Ontario
Sat 5/30
5:55 pm-6:20 am
1 stop9h 25m
$317
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Sat 4/25
3:00 pm-9:00 pm
1 stop9h 00m
Ontario
Mon 5/4
10:15 pm-11:35 am
1 stop10h 20m
$340
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Sat 5/9
6:00 am-12:22 pm
1 stop9h 22m
Ontario
Mon 5/11
6:59 pm-8:23 am
1 stop10h 24m
$346
Quickest round-trip
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Thu 4/2
5:30 am-12:20 pm
1 stop9h 50m
Ontario
Thu 4/9
1:27 pm-1:05 am
1 stop8h 38m
$351
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Tue 5/5
7:21 am-8:36 pm
2 stops16h 15m
Ontario
Wed 5/6
6:59 pm-8:23 am
1 stop10h 24m
$352
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Wed 3/25
9:00 am-6:13 pm
1 stop12h 13m
Ontario
Tue 4/7
10:33 am-11:59 pm
1 stop10h 26m
$353
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Mon 4/27
7:00 am-2:32 pm
1 stop10h 32m
Ontario
Tue 5/5
10:39 am-11:59 pm
1 stop10h 20m
$353
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Wed 5/27
9:30 am-8:42 pm
2 stops14h 12m
Ontario
Sat 5/30
6:30 am-7:30 pm
1 stop10h 00m
$356
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 March.
| 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?
Use this chart to determine the optimal time to book a round-trip flight from Boston to Ontario. Price data was last updated on March 13, 2026.
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 61 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, August is the cheapest month in which you can book a flight from Boston to Ontario (average of $115). Flying from Boston to Ontario in March is currently the most expensive (average of $179). 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?
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 March 15, 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.
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
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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Alternative routes for Boston to Ontario
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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 March 15, 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 March 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$148 | Average$436 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$239 | Average$398 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$259 | Average$358 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$290 | Average$392 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$307 | Average$437 | FlexibilityNo cancel fee | On-time63% |