$114+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — ONT
Jul 9 — Jul 161
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 June 9, 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 June 9, 2026.
This Travelocity deal was found by Cheapflights users on 6/7. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/210:45 am
BOS
- ONT
2 stops14h 54m
Alaska Airlines
Tue 12/812:00 pm
ONT
- BOS
1 stop9h 05m
Alaska Airlines
Deal found 6/7![Alaska Airlines logo]()
$372
This Super.com deal was found by Cheapflights users on 6/7. 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.
Thu 8/64:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Sun 8/911:50 pm
ONT
- BOS
1 stop8h 31m
JetBlue
Deal found 6/7![JetBlue logo]()
$373
This Southwest deal was found by Cheapflights users on 6/5. 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 6/305:00 am
BOS
- ONT
1 stop10h 40m
Southwest
Tue 7/145:30 am
ONT
- BOS
2 stops9h 30m
Southwest
Deal found 6/5![Southwest logo]()
$374
This JetBlue deal was found by Cheapflights users on 6/5. 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.
Fri 7/105:09 pm
BOS
- ONT
1 stop8h 27m
JetBlue
Mon 7/1311:51 pm
ONT
- BOS
1 stop8h 42m
JetBlue
Deal found 6/5![JetBlue logo]()
$377
This American Airlines deal was found by Cheapflights users on 6/8. 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 7/25:07 pm
BOS
- ONT
1 stop7h 36m
American Airlines
Wed 7/81:11 pm
ONT
- BOS
1 stop7h 03m
American Airlines
Deal found 6/8![American Airlines logo]()
$378
This Southwest deal was found by Cheapflights users on 6/7. 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 12/27:05 am
BOS
- ONT
2 stops10h 20m
Southwest
Tue 12/88:40 am
ONT
- BOS
2 stops10h 15m
Southwest
Deal found 6/7![Southwest logo]()
$379
This United Airlines deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/296:00 am
BOS
- ONT
1 stop9h 12m
United Airlines
Fri 7/176:39 pm
ONT
- BOS
1 stop8h 42m
United Airlines
Deal found 6/4![United Airlines logo]()
$380
This Southwest deal was found by Cheapflights users on 6/4. 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 7/45:30 am
BOS
- ONT
1 stop9h 45m
Southwest
Sat 7/115:00 am
ONT
- BOS
1 stop10h 05m
Southwest
Deal found 6/4![Southwest logo]()
$383
This Southwest deal was found by Cheapflights users on 6/5. 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 10/153:50 pm
BOS
- ONT
2 stops9h 45m
Southwest
Mon 10/1911:55 pm
ONT
- BOS
1 stop8h 40m
Southwest
Deal found 6/5![Southwest logo]()
$384
This CheapOair deal was found by Cheapflights users on 6/8. 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.
Wed 9/169:33 am
BOS
- ONT
1 stop10h 45m
Alaska Airlines
Wed 9/234:27 pm
ONT
- BOS
2 stops10h 42m
Alaska Airlines
Deal found 6/8![Alaska Airlines logo]()
$385
This flugladen.de deal was found by Cheapflights users on 6/9. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/44:43 pm
BOS
- ONT
1 stop8h 18m
JetBlue
Mon 7/1311:51 pm
ONT
- BOS
1 stop8h 42m
JetBlue
Deal found 6/9![JetBlue logo]()
$386
This Delta deal was found by Cheapflights users on 6/6. 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 7/285:30 am
BOS
- ONT
1 stop8h 08m
Delta
Fri 8/75:05 pm
ONT
- BOS
1 stop10h 25m
Delta
Deal found 6/6![Delta logo]()
$388
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 June 9, 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 June 9, 2026.
This Southwest deal was found by Cheapflights users on 6/5. 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 7/47:45 am
BOS
- ONT
1 stop7h 45m
Southwest
Fri 7/102:30 pm
ONT
- BOS
1 stop7h 35m
Southwest
Deal found 6/5![Southwest logo]()
$397
This Alaska Airlines deal was found by Cheapflights users on 6/5. 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 8/207:59 pm
BOS
- ONT
2 stops23h 11m
Alaska Airlines
Sun 8/2310:47 am
ONT
- BOS
1 stop16h 22m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$420
This Delta deal was found by Cheapflights users on 6/5. 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 7/310:20 am
BOS
- ONT
1 stop11h 10m
Delta
Wed 7/1511:48 am
ONT
- BOS
1 stop8h 48m
Delta
Deal found 6/5![Delta logo]()
$437
This United Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/293:10 pm
BOS
- ONT
1 stop8h 32m
United Airlines
Tue 7/71:18 pm
ONT
- BOS
1 stop7h 26m
United Airlines
Deal found 6/7![United Airlines logo]()
$460
This JetBlue deal was found by Cheapflights users on 6/6. 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.
Fri 7/315:05 pm
BOS
- ONT
1 stop8h 31m
JetBlue
Sat 8/811:24 pm
ONT
- BOS
1 stop10h 57m
JetBlue
Deal found 6/6![JetBlue logo]()
$494
This Delta deal was found by Cheapflights users on 6/5. 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 7/203:40 pm
BOS
- ONT
1 stop10h 12m
Delta
Mon 7/276:01 pm
ONT
- BOS
1 stop10h 34m
Delta
Deal found 6/5![Delta logo]()
$437
This United Airlines deal was found by Cheapflights users on 6/4. 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 8/209:00 am
BOS
- ONT
2 stops14h 01m
United Airlines
Sun 8/237:13 pm
ONT
- BOS
2 stops14h 34m
United Airlines
Deal found 6/4![United Airlines logo]()
$462
This Southwest deal was found by Cheapflights users on 6/8. 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 7/13:45 pm
BOS
- ONT
2 stops10h 00m
Southwest
Thu 7/99:40 pm
ONT
- BOS
2 stops10h 15m
Southwest
Deal found 6/8![Southwest logo]()
$480
This Alaska Airlines deal was found by Cheapflights users on 6/7. 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 6/169:00 am
BOS
- ONT
1 stop10h 30m
Alaska Airlines
Sat 6/2012:04 pm
ONT
- BOS
1 stop8h 55m
Alaska Airlines
Deal found 6/7![Alaska Airlines logo]()
$495
This United Airlines deal was found by Cheapflights users on 6/7. 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 7/26:00 am
BOS
- ONT
1 stop9h 12m
United Airlines
Mon 7/131:50 pm
ONT
- BOS
1 stop8h 21m
United Airlines
Deal found 6/7![United Airlines logo]()
$463
This Alaska Airlines deal was found by Cheapflights users on 6/8. 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 6/157:03 am
BOS
- ONT
1 stop12h 27m
Alaska Airlines
Sun 7/56:02 am
ONT
- BOS
1 stop9h 39m
Alaska Airlines
Deal found 6/8![Alaska Airlines logo]()
$512
This United Airlines deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/174:15 pm
BOS
- ONT
1 stop9h 22m
United Airlines
Fri 6/191:50 pm
ONT
- BOS
1 stop8h 21m
United Airlines
Deal found 6/4![United Airlines logo]()
$516
Last-minute flights from Boston to OntarioDiscover last-minute flight deals from Boston to Ontario. Data last updated June 9, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Ontario. Data last updated June 9, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 6/9. 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 6/2512:36 pm
BOS
- ONT
1 stop8h 45m
American Airlines
Sat 7/1112:35 pm
ONT
- BOS
1 stop8h 24m
American Airlines
Deal found 6/9![American Airlines logo]()
$390
This United Airlines deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/296:00 am
BOS
- ONT
1 stop9h 12m
United Airlines
Fri 7/176:39 pm
ONT
- BOS
1 stop8h 42m
United Airlines
Deal found 6/4![United Airlines logo]()
$380
This Southwest deal was found by Cheapflights users on 6/5. 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 6/305:00 am
BOS
- ONT
1 stop10h 40m
Southwest
Tue 7/145:30 am
ONT
- BOS
2 stops9h 30m
Southwest
Deal found 6/5![Southwest logo]()
$374
This American Airlines deal was found by Cheapflights users on 6/8. 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 7/25:07 pm
BOS
- ONT
1 stop7h 36m
American Airlines
Wed 7/81:11 pm
ONT
- BOS
1 stop7h 03m
American Airlines
Deal found 6/8![American Airlines logo]()
$378
This Southwest deal was found by Cheapflights users on 6/4. 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 7/45:30 am
BOS
- ONT
1 stop9h 45m
Southwest
Sat 7/115:00 am
ONT
- BOS
1 stop10h 05m
Southwest
Deal found 6/4![Southwest logo]()
$383
This flugladen.de deal was found by Cheapflights users on 6/9. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/44:43 pm
BOS
- ONT
1 stop8h 18m
JetBlue
Mon 7/1311:51 pm
ONT
- BOS
1 stop8h 42m
JetBlue
Deal found 6/9![JetBlue logo]()
$386
This Southwest deal was found by Cheapflights users on 6/5. 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 7/47:45 am
BOS
- ONT
1 stop7h 45m
Southwest
Fri 7/102:30 pm
ONT
- BOS
1 stop7h 35m
Southwest
Deal found 6/5![Southwest logo]()
$397
This JetBlue deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/84:10 pm
BOS
- ONT
1 stop9h 34m
JetBlue
Sun 7/1211:58 pm
ONT
- BOS
1 stop8h 35m
JetBlue
Deal found 6/5![JetBlue logo]()
$393
This JetBlue deal was found by Cheapflights users on 6/5. 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.
Fri 7/105:09 pm
BOS
- ONT
1 stop8h 27m
JetBlue
Mon 7/1311:51 pm
ONT
- BOS
1 stop8h 42m
JetBlue
Deal found 6/5![JetBlue logo]()
$377
This Super.com deal was found by Cheapflights users on 6/7. 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.
Fri 7/245:09 pm
BOS
- ONT
1 stop8h 27m
JetBlue
Mon 8/311:51 pm
ONT
- BOS
1 stop8h 35m
JetBlue
Deal found 6/7![JetBlue logo]()
$389
This Southwest deal was found by Cheapflights users on 6/8. 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 7/243:55 pm
BOS
- ONT
1 stop9h 30m
Southwest
Sat 8/19:50 am
ONT
- BOS
2 stops10h 50m
Southwest
Deal found 6/8![Southwest logo]()
$394
This Delta deal was found by Cheapflights users on 6/6. 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 7/285:30 am
BOS
- ONT
1 stop8h 08m
Delta
Fri 8/75:05 pm
ONT
- BOS
1 stop10h 25m
Delta
Deal found 6/6![Delta logo]()
$388
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 June 9, 2026.
Search for one-way flight options from Boston to Ontario. Find affordable one-way fares based on user searches. Data last updated June 9, 2026.
This Southwest deal was found by Cheapflights users on 6/8. 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 9/153:20 pm
BOS
- ONT
2 stops9h 40m
Southwest
Deal found 6/8![Southwest logo]()
$114
This Southwest deal was found by Cheapflights users on 6/7. 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 12/25:00 am
BOS
- ONT
1 stop8h 15m
Southwest
Deal found 6/7![Southwest logo]()
$121
This Super.com deal was found by Cheapflights users on 6/8. 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.
Fri 8/144:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/8![JetBlue logo]()
$123
This Super.com deal was found by Cheapflights users on 6/4. 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.
Fri 8/214:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/4![JetBlue logo]()
$124
This JetBlue deal was found by Cheapflights users on 6/4. 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 8/204:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/4![JetBlue logo]()
$133
This Delta deal was found by Cheapflights users on 6/9. 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 8/225:30 am
BOS
- ONT
1 stop8h 12m
Delta
Deal found 6/9![Delta logo]()
$149
This Delta deal was found by Cheapflights users on 6/8. 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 8/216:05 am
BOS
- ONT
1 stop9h 11m
Delta
Deal found 6/8![Delta logo]()
$150
This Southwest deal was found by Cheapflights users on 6/8. 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 9/55:40 am
BOS
- ONT
1 stop7h 40m
Southwest
Deal found 6/8![Southwest logo]()
$152
This Trip.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/29:33 am
BOS
- ONT
1 stop10h 37m
Alaska Airlines
Deal found 6/8![Alaska Airlines logo]()
$154
This Super.com deal was found by Cheapflights users on 6/8. 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.
Tue 9/12:45 pm
BOS
- ONT
1 stop10h 50m
JetBlue
Deal found 6/8![JetBlue logo]()
$155
This Super.com deal was found by Cheapflights users on 6/5. 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.
Tue 8/112:45 pm
BOS
- ONT
1 stop10h 50m
JetBlue
Deal found 6/5![JetBlue logo]()
$156
This Southwest deal was found by Cheapflights users on 6/8. 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 8/175:00 am
BOS
- ONT
2 stops10h 00m
Southwest
Deal found 6/8![Southwest 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 June 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $372 (Travelocity) |
One-way from | $114 (Southwest) |
Popular in | December |
Cheapest in | February |
Average price | $408 |
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 June 9, 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
Quickest round-trip
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Sat 7/4
7:45 am-12:30 pm
1 stop7h 45m
Ontario
Fri 7/10
2:30 pm-1:05 am
1 stop7h 35m
$397
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Thu 8/20
7:59 pm-4:10 pm
2 stops23h 11m
Ontario
Sun 8/23
10:47 am-6:09 am
1 stop16h 22m
$420
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Fri 7/3
10:20 am-6:30 pm
1 stop11h 10m
Ontario
Wed 7/15
11:48 am-11:36 pm
1 stop8h 48m
$437
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Mon 7/20
3:40 pm-10:52 pm
1 stop10h 12m
Ontario
Mon 7/27
6:01 pm-7:35 am
1 stop10h 34m
$437
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Mon 6/29
3:10 pm-8:42 pm
1 stop8h 32m
Ontario
Tue 7/7
1:18 pm-11:44 pm
1 stop7h 26m
$460
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Thu 8/20
9:00 am-8:01 pm
2 stops14h 01m
Ontario
Sun 8/23
7:13 pm-12:47 pm
2 stops14h 34m
$462
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Thu 7/2
6:00 am-12:12 pm
1 stop9h 12m
Ontario
Mon 7/13
1:50 pm-1:11 am
1 stop8h 21m
$463
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Wed 7/1
3:45 pm-10:45 pm
2 stops10h 00m
Ontario
Thu 7/9
9:40 pm-10:55 am
2 stops10h 15m
$480
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Fri 7/31
5:05 pm-10:36 pm
1 stop8h 31m
Ontario
Sat 8/8
11:24 pm-1:21 pm
1 stop10h 57m
$494
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Tue 6/16
9:00 am-4:30 pm
1 stop10h 30m
Ontario
Sat 6/20
12:04 pm-11:59 pm
1 stop8h 55m
$495
Showing 1-10 of 24 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 June.
| 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 $877). 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 June 9, 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.
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Overall
7.9
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Other flights from Boston
Popular flights
Alternative routes for Boston to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Boston to Ontario by cabin class
Find flights from Boston to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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 June 9, 2026.
Boston and Ontario flights
Browse other Boston and Ontario flight options. Last updated on June 9, 2026.
Other flights from Boston
Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on June 9, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 June 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$149 | Average$526 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$239 | Average$437 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$258 | Average$419 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$305 | Average$478 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$319 | Average$762 | FlexibilityNo cancel fee | On-time62% |