$132+ Cheap flights from Boston to Ontario (BOS - ONT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — ONT
Nov 24 — Dec 11
Round-trip
1 adult, Economy
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Find cheap flights from Boston to Ontario with Cheapflights
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Cheapest flights from Boston to OntarioExplore the most affordable flight options available from Boston to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 25, 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 October 25, 2026.
This Priceline deal was found by Cheapflights users on 10/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:13 am -
1 stop11h 00m
Sat 11/144:09 pm -
1 stop10h 31m
Deal found 10/21![Alaska Airlines logo]()
$263
This American Airlines deal was found by Cheapflights users on 10/21. 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 12/56:03 am -
1 stop9h 09m
Sat 12/1210:32 am -
1 stop8h 51m
Deal found 10/21![American Airlines logo]()
$264
This Southwest deal was found by Cheapflights users on 10/20. 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.
Tue 11/105:00 am -
2 stops9h 55m
Tue 11/101:55 pm -
1 stop6h 50m
Deal found 10/20![Southwest logo]()
$268
This Southwest deal was found by Cheapflights users on 10/20. 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.
Sat 12/125:25 am -
2 stops11h 45m
Sat 12/192:35 pm -
1 stop7h 00m
Deal found 10/20![Southwest logo]()
$269
This Mytrip deal was found by Cheapflights users on 10/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/86:22 pm -
1 stop19h 51m
Thu 12/106:00 am -
1 stop14h 59m
Deal found 10/20![Alaska Airlines logo]()
$272
This Gotogate deal was found by Cheapflights users on 10/24. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/107:00 am -
1 stop12h 05m
Wed 12/166:00 am -
1 stop14h 59m
Deal found 10/24![Alaska Airlines logo]()
$274
This Mytrip deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:13 am -
1 stop11h 00m
Sat 11/146:00 am -
1 stop14h 58m
Deal found 10/21![Alaska Airlines logo]()
$275
This Delta deal was found by Cheapflights users on 10/20. 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.
Tue 11/105:30 am -
1 stop8h 33m
Tue 11/105:56 pm -
1 stop10h 24m
Deal found 10/20![Delta logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 11/139:03 am -
1 stop12h 14m
Tue 11/174:09 pm -
1 stop10h 31m
Deal found 10/21![Alaska Airlines logo]()
$299
This Delta deal was found by Cheapflights users on 10/21. 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 11/136:45 pm -
1 stop8h 04m
Mon 11/165:04 pm -
1 stop10h 16m
Deal found 10/21![Delta logo]()
$315
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 October 25, 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 October 25, 2026.
This Delta deal was found by Cheapflights users on 10/23. 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 11/163:45 pm -
1 stop10h 15m
Mon 11/3011:10 pm -
1 stop8h 56m
Deal found 10/23![Delta logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 10/23. 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 11/139:03 am -
1 stop12h 14m
Wed 11/184:09 pm -
1 stop10h 31m
Deal found 10/23![Alaska Airlines logo]()
$299
This Southwest deal was found by Cheapflights users on 10/20. 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.
Sat 12/125:25 am -
2 stops11h 45m
Sat 12/195:00 am -
2 stops10h 05m
Deal found 10/20![Southwest logo]()
$369
This United Airlines deal was found by Cheapflights users on 10/22. 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 1/79:15 am -
1 stop11h 20m
Mon 1/116:37 pm -
1 stop10h 24m
Deal found 10/22![United Airlines logo]()
$388
This Delta deal was found by Cheapflights users on 10/21. 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 11/136:45 pm -
1 stop8h 04m
Tue 11/175:04 pm -
1 stop10h 16m
Deal found 10/21![Delta logo]()
$316
This United Airlines deal was found by Cheapflights users on 10/24. 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 1/167:00 am -
1 stop8h 40m
Sun 1/246:37 pm -
1 stop10h 24m
Deal found 10/24![United Airlines logo]()
$402
This Alaska Airlines deal was found by Cheapflights users on 10/24. 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 11/79:03 am -
1 stop12h 14m
Sat 11/144:09 pm -
1 stop10h 31m
Deal found 10/24![Alaska Airlines logo]()
$407
This Alaska Airlines deal was found by Cheapflights users on 10/24. 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 11/149:03 am -
1 stop12h 14m
Tue 11/1712:02 pm -
1 stop8h 56m
Deal found 10/24![Alaska Airlines logo]()
$407
This Delta deal was found by Cheapflights users on 10/24. 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 12/176:45 pm -
1 stop8h 12m
Tue 12/295:05 pm -
1 stop10h 24m
Deal found 10/24![Delta logo]()
$407
This United Airlines deal was found by Cheapflights users on 10/20. 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.
Fri 11/69:00 am -
1 stop9h 33m
Wed 11/119:25 am -
1 stop8h 59m
Deal found 10/20![United Airlines logo]()
$465
This Delta deal was found by Cheapflights users on 10/21. 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 11/261:45 pm -
1 stop9h 04m
Wed 12/212:20 pm -
1 stop9h 55m
Deal found 10/21![Delta logo]()
$461
This United Airlines deal was found by Cheapflights users on 10/20. 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.
Fri 11/69:00 am -
1 stop9h 33m
Tue 11/109:25 am -
2 stops11h 34m
Deal found 10/20![United Airlines logo]()
$470
Last-minute flights from Boston to OntarioDiscover last-minute flight deals from Boston to Ontario. Data last updated October 25, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Ontario. Data last updated October 25, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 11/79:03 am -
1 stop12h 14m
Wed 11/114:09 pm -
1 stop10h 31m
Deal found 10/21![Alaska Airlines logo]()
$335
This Delta deal was found by Cheapflights users on 10/20. 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.
Mon 11/93:45 pm -
1 stop10h 15m
Mon 11/1611:10 pm -
1 stop10h 22m
Deal found 10/20![Delta logo]()
$316
This Priceline deal was found by Cheapflights users on 10/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:13 am -
1 stop11h 00m
Sat 11/144:09 pm -
1 stop10h 31m
Deal found 10/21![Alaska Airlines logo]()
$263
This Mytrip deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:13 am -
1 stop11h 00m
Sun 11/156:00 am -
1 stop14h 58m
Deal found 10/21![Alaska Airlines logo]()
$332
This Mytrip deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:13 am -
1 stop11h 00m
Sat 11/146:00 am -
1 stop14h 58m
Deal found 10/21![Alaska Airlines logo]()
$275
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 11/127:13 am -
1 stop11h 00m
Sat 11/144:09 pm -
1 stop10h 31m
Deal found 10/21![Alaska Airlines logo]()
$345
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 11/139:03 am -
1 stop12h 14m
Tue 11/174:09 pm -
1 stop10h 31m
Deal found 10/21![Alaska Airlines logo]()
$299
This Delta deal was found by Cheapflights users on 10/21. 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 11/136:45 pm -
1 stop8h 04m
Mon 11/165:04 pm -
1 stop10h 16m
Deal found 10/21![Delta logo]()
$315
This Delta deal was found by Cheapflights users on 10/23. 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 11/156:05 am -
1 stop9h 12m
Thu 12/312:20 pm -
1 stop8h 00m
Deal found 10/23![Delta logo]()
$334
This Delta deal was found by Cheapflights users on 10/23. 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 11/163:45 pm -
1 stop10h 15m
Wed 12/25:55 pm -
1 stop10h 24m
Deal found 10/23![Delta logo]()
$297
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/171:29 pm -
2 stops10h 22m
Thu 11/196:00 am -
1 stop7h 49m
Deal found 10/23![United Airlines logo]()
$268
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/232:40 pm -
2 stops11h 08m
Wed 12/21:40 pm -
1 stop7h 18m
Deal found 10/23![United Airlines logo]()
$340
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 October 25, 2026.
Search for one-way flight options from Boston to Ontario. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.
This Southwest deal was found by Cheapflights users on 10/23. 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 11/175:00 am -
1 stop8h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Southwest logo]()
$132
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/171:29 pm -
2 stops10h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![United Airlines logo]()
$137
This Southwest deal was found by Cheapflights users on 10/22. 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 1/165:15 am -
1 stop12h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Southwest logo]()
$138
This Mytrip deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/66:28 pm -
1 stop19h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Alaska Airlines logo]()
$147
This Mytrip deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:22 pm -
1 stop19h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Alaska Airlines logo]()
$148
This Delta deal was found by Cheapflights users on 10/22. 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 12/146:45 pm -
1 stop8h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Delta logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1312:11 pm -
2 stops23h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Multiple Airlines logo]()
$155
This Mytrip deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1312:39 pm -
2 stops25h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Frontier logo]()
$161
This Delta deal was found by Cheapflights users on 10/21. 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 12/116:05 am -
1 stop9h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Delta logo]()
$167
This Priceline deal was found by Cheapflights users on 10/22. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/139:03 am -
1 stop12h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Alaska Airlines logo]()
$168
This Southwest deal was found by Cheapflights users on 10/20. 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.
Sun 12/65:10 pm -
1 stop8h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Southwest logo]()
$169
This SmartFares deal was found by Cheapflights users on 10/24. 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 11/237:50 am -
1 stop12h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Delta logo]()
$178
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 October 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $263 (Priceline) |
One-way from | $132 (Southwest) |
Popular in | December |
Cheapest in | February |
Average price | $466 |
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 7,457,451 searches. Data last updated October 25, 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 Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Tue 11/17
5:00 am-10:10 am
1 stop8h 10m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$132
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Mon 12/14
9:45 am-5:36 pm
1 stop10h 51m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$197
Quickest round-trip
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Tue 11/17
6:45 pm-11:49 pm
1 stop8h 04m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Wed 12/16
4:56 pm-11:54 pm
1 stop9h 58m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Fri 12/4
4:10 pm-9:55 pm
1 stop8h 45m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Wed 11/11
6:45 pm-11:49 pm
1 stop8h 04m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Tue 1/12
5:10 am-1:25 pm
2 stops11h 15m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$209
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Fri 12/25
7:00 am-3:03 pm
1 stop11h 03m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$230
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Mon 1/4
7:00 am-3:03 pm
1 stop11h 03m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$249
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Thu 2/18
8:15 am-8:20 pm
2 stops15h 05m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$256
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 October.
| 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 $352). Flying from Boston to Ontario in December is currently the most expensive (average of $796). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Boston to Ontario?
Airfare is below average for this route at the moment.
Boston to Ontario flights typically cost between $402 and $600 in November.The cheapest round-trip price found within the last 5 days was $263 on Alaska Airlines (Nov 10-Nov 14).
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 October 25, 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
Entertainment
7.4
Crew
8.6
Food
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Entertainment
7.4
Crew
8.6
Food
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Entertainment
7.4
Crew
8.6
Food
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Entertainment
7.4
Crew
8.6
Food
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Entertainment
7.4
Crew
8.6
Food
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Entertainment
7.4
Crew
8.6
Food
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from Boston to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Boston to Ontario
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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 October 25, 2026.
Boston and Ontario flights
Browse other Boston and Ontario flight options. Last updated on October 25, 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 October 25, 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 7,457,451 searches. Data last updated October 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$233 | Average$524 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$258 | Average$500 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$258 | Average$502 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$298 | Average$762 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$317 | Average$508 | FlexibilityNo cancel fee | On-time63% |