$123+ Cheap flights from Ontario (ONT) to Maine
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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PWM
Jul 8 — Jul 151
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Ontario to Maine 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 Ontario to Maine
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to MaineExplore the most affordable flight options available from Ontario to Maine. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 8, 2026.
Explore the most affordable flight options available from Ontario to Maine. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 8, 2026.
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.
Tue 9/11:50 pm
ONT
- BOS
1 stop7h 15m
Southwest
Wed 9/29:25 am
BOS
- ONT
1 stop8h 00m
Southwest
Deal found 6/7![Southwest logo]()
$216
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.
Tue 7/2811:51 pm
ONT
- BOS
1 stop11h 31m
JetBlue
Wed 8/124:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/7![JetBlue logo]()
$257
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 7/2811:51 pm
ONT
- BOS
1 stop11h 31m
JetBlue
Tue 8/182:45 pm
BOS
- ONT
1 stop10h 50m
JetBlue
Deal found 6/5![JetBlue logo]()
$259
This Jetabroad 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1111:50 pm
ONT
- BOS
1 stop8h 31m
JetBlue
Tue 8/182:45 pm
BOS
- ONT
1 stop10h 50m
JetBlue
Deal found 6/7![JetBlue logo]()
$264
This JetBlue 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1211:50 pm
ONT
- BOS
1 stop8h 26m
JetBlue
Wed 8/194:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/7![JetBlue logo]()
$265
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.
Tue 8/1111:55 pm
ONT
- BOS
1 stop9h 20m
Southwest
Tue 8/182:45 pm
BOS
- ONT
2 stops10h 15m
Southwest
Deal found 6/7![Southwest logo]()
$277
This Super.com 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:50 pm
ONT
- BOS
1 stop8h 31m
JetBlue
Wed 8/194:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/6![JetBlue logo]()
$282
This Super.com 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/511:51 pm
ONT
- BOS
1 stop8h 25m
JetBlue
Wed 8/124:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/6![JetBlue logo]()
$290
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.
Mon 8/2411:50 pm
ONT
- BOS
1 stop8h 26m
JetBlue
Fri 8/284:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/4![JetBlue logo]()
$293
This JetBlue 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1811:50 pm
ONT
- PWM
1 stop10h 55m
JetBlue
Wed 8/262:40 pm
PWM
- ONT
1 stop10h 55m
JetBlue
Deal found 6/7![JetBlue logo]()
$296
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.
Mon 8/1011:50 pm
ONT
- PWM
1 stop9h 27m
JetBlue
Wed 8/192:40 pm
PWM
- ONT
1 stop10h 55m
JetBlue
Deal found 6/4![JetBlue logo]()
$339
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.
Mon 8/311:51 pm
ONT
- PWM
1 stop9h 25m
JetBlue
Thu 8/62:40 pm
PWM
- ONT
1 stop10h 55m
JetBlue
Deal found 6/6![JetBlue logo]()
$346
Best flights from Ontario to MaineDiscover carefully curated flight deals from Ontario to Maine that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 8, 2026.
Discover carefully curated flight deals from Ontario to Maine that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 8, 2026.
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.
Tue 8/1111:55 pm
ONT
- BOS
1 stop9h 20m
Southwest
Tue 8/182:45 pm
BOS
- ONT
2 stops10h 15m
Southwest
Deal found 6/7![Southwest logo]()
$277
This Delta deal was found by Cheapflights users on 6/3. 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 10/1511:55 am
ONT
- BOS
1 stop9h 25m
Delta
Sat 10/175:45 am
BOS
- ONT
1 stop8h 42m
Delta
Deal found 6/3![Delta logo]()
$317
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:14 pm
ONT
- BOS
1 stop8h 55m
Alaska Airlines
Wed 9/237:12 am
BOS
- ONT
1 stop10h 04m
Alaska Airlines
Deal found 6/4![Alaska Airlines logo]()
$338
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.
Mon 8/1011:50 pm
ONT
- PWM
1 stop9h 27m
JetBlue
Wed 8/192:40 pm
PWM
- ONT
1 stop10h 55m
JetBlue
Deal found 6/4![JetBlue logo]()
$339
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.
Tue 7/75:00 am
ONT
- BOS
1 stop7h 44m
United Airlines
Wed 7/156:00 am
BOS
- ONT
1 stop9h 12m
United Airlines
Deal found 6/4![United Airlines logo]()
$427
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 7/72:50 pm
ONT
- BOS
1 stop7h 00m
Southwest
Wed 7/295:25 am
BOS
- ONT
1 stop9h 40m
Southwest
Deal found 6/5![Southwest logo]()
$317
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.
Mon 9/146:14 pm
ONT
- BOS
1 stop8h 55m
Alaska Airlines
Tue 9/299:33 am
BOS
- ONT
1 stop10h 45m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$338
This Delta deal was found by Cheapflights users on 6/3. 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 7/47:05 am
ONT
- PWM
1 stop7h 51m
Delta
Thu 7/91:55 pm
PWM
- ONT
1 stop10h 55m
Delta
Deal found 6/3![Delta logo]()
$351
This Southwest deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1611:55 pm
ONT
- BOS
1 stop8h 45m
Southwest
Sun 9/205:20 am
BOS
- ONT
1 stop7h 40m
Southwest
Deal found 6/3![Southwest logo]()
$327
This Delta deal was found by Cheapflights users on 6/3. 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 9/1411:59 am
ONT
- PWM
1 stop8h 26m
Delta
Sat 9/196:02 am
PWM
- ONT
2 stops15h 31m
Delta
Deal found 6/3![Delta logo]()
$356
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.
Tue 7/2111:51 pm
ONT
- PWM
1 stop10h 54m
JetBlue
Thu 7/302:40 pm
PWM
- ONT
1 stop11h 04m
JetBlue
Deal found 6/5![JetBlue logo]()
$393
This Alaska Airlines deal was found by Cheapflights users on 6/3. 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 8/175:32 pm
ONT
- BOS
1 stop9h 48m
Alaska Airlines
Sat 9/129:33 am
BOS
- ONT
1 stop10h 45m
Alaska Airlines
Deal found 6/3![Alaska Airlines logo]()
$359
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/129:01 am
ONT
- BOS
1 stop10h 58m
United Airlines
Tue 8/189:30 am
BOS
- ONT
2 stops13h 31m
United Airlines
Deal found 6/5![United Airlines logo]()
$432
This Delta deal was found by Cheapflights users on 6/3. 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 7/65:59 pm
ONT
- BOS
1 stop10h 36m
Delta
Wed 7/226:05 am
BOS
- ONT
1 stop9h 05m
Delta
Deal found 6/3![Delta logo]()
$378
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.
Fri 9/47:12 am
ONT
- BOS
1 stop19h 57m
Alaska Airlines
Wed 9/95:42 pm
BOS
- ONT
1 stop19h 09m
Alaska Airlines
Deal found 6/7![Alaska Airlines logo]()
$397
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.
Fri 7/39:40 pm
ONT
- BOS
1 stop7h 25m
Southwest
Mon 7/133:55 pm
BOS
- ONT
1 stop9h 30m
Southwest
Deal found 6/7![Southwest logo]()
$409
This JetBlue deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/811:24 pm
ONT
- PWM
1 stop9h 53m
JetBlue
Sat 8/152:40 pm
PWM
- ONT
1 stop10h 25m
JetBlue
Deal found 6/3![JetBlue logo]()
$469
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:02 am
ONT
- PWM
2 stops13h 55m
United Airlines
Wed 12/99:34 am
PWM
- ONT
2 stops13h 46m
United Airlines
Deal found 6/5![United Airlines logo]()
$481
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.
Mon 6/296:30 pm
ONT
- PWM
2 stops12h 25m
Southwest
Thu 7/23:10 pm
PWM
- ONT
2 stops11h 20m
Southwest
Deal found 6/4![Southwest logo]()
$524
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.
Tue 8/255:00 am
ONT
- BGR
2 stops26h 47m
United Airlines
Sat 8/294:43 pm
BGR
- ONT
1 stop8h 52m
United Airlines
Deal found 6/4![United Airlines logo]()
$640
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.
Fri 8/2111:50 pm
ONT
- PWM
1 stop10h 55m
JetBlue
Wed 8/262:40 pm
PWM
- ONT
1 stop10h 55m
JetBlue
Deal found 6/4![JetBlue logo]()
$688
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.
Fri 6/196:30 pm
ONT
- PWM
2 stops11h 53m
United Airlines
Wed 6/243:31 pm
PWM
- ONT
1 stop8h 15m
United Airlines
Deal found 6/7![United Airlines logo]()
$665
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.
Sat 6/206:05 am
ONT
- BGR
2 stops14h 27m
United Airlines
Wed 6/244:26 pm
BGR
- ONT
1 stop9h 25m
United Airlines
Deal found 6/7![United Airlines logo]()
$688
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/266:10 am
ONT
- PWM
2 stops14h 41m
United Airlines
Mon 6/295:00 pm
PWM
- ONT
1 stop8h 51m
United Airlines
Deal found 6/5![United Airlines logo]()
$692
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 6/296:10 am
ONT
- BGR
1 stop12h 37m
United Airlines
Sat 7/44:48 pm
BGR
- ONT
1 stop9h 03m
United Airlines
Deal found 6/7![United Airlines logo]()
$692
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/51:18 pm
ONT
- BGR
2 stops18h 29m
United Airlines
Wed 9/94:50 pm
BGR
- ONT
2 stops22h 22m
United Airlines
Deal found 6/5![United Airlines logo]()
$700
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.
Sat 6/206:05 am
ONT
- BGR
1 stop12h 42m
United Airlines
Sat 6/274:48 pm
BGR
- ONT
1 stop9h 03m
United Airlines
Deal found 6/7![United Airlines logo]()
$713
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.
Sat 6/206:05 am
ONT
- BGR
1 stop12h 42m
United Airlines
Tue 6/234:26 pm
BGR
- ONT
1 stop9h 25m
United Airlines
Deal found 6/7![United Airlines logo]()
$747
Last-minute flights from Ontario to MaineDiscover last-minute flight deals from Ontario to Maine. Data last updated June 8, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Maine. Data last updated June 8, 2026 and is based on user searches.
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/310:00 pm
ONT
- BOS
1 stop8h 45m
Delta
Wed 8/126:05 am
BOS
- ONT
1 stop9h 11m
Delta
Deal found 6/7![Delta logo]()
$332
This Delta deal was found by Cheapflights users on 6/3. 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 7/45:21 pm
ONT
- BOS
1 stop9h 44m
Delta
Wed 7/226:05 am
BOS
- ONT
1 stop9h 05m
Delta
Deal found 6/3![Delta logo]()
$317
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/45:21 pm
ONT
- BOS
1 stop9h 44m
Delta
Thu 7/96:05 am
BOS
- ONT
1 stop9h 05m
Delta
Deal found 6/7![Delta logo]()
$327
This Southwest deal was found by Cheapflights users on 6/3. 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 7/711:55 pm
ONT
- BOS
1 stop8h 00m
Southwest
Tue 7/215:25 am
BOS
- ONT
1 stop9h 40m
Southwest
Deal found 6/3![Southwest logo]()
$338
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.
Sun 7/1211:58 pm
ONT
- BOS
1 stop8h 35m
JetBlue
Thu 8/64:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/7![JetBlue logo]()
$340
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.
Tue 7/142:50 pm
ONT
- BOS
1 stop7h 00m
Southwest
Tue 7/215:25 am
BOS
- ONT
1 stop9h 40m
Southwest
Deal found 6/4![Southwest logo]()
$322
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.
Tue 7/2811:51 pm
ONT
- BOS
1 stop11h 31m
JetBlue
Wed 8/124:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/7![JetBlue logo]()
$257
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 7/2811:51 pm
ONT
- BOS
1 stop11h 31m
JetBlue
Tue 8/182:45 pm
BOS
- ONT
1 stop10h 50m
JetBlue
Deal found 6/5![JetBlue logo]()
$259
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2811:51 pm
ONT
- PWM
1 stop10h 54m
JetBlue
Fri 8/72:49 pm
PWM
- ONT
1 stop10h 46m
JetBlue
Deal found 6/8![JetBlue logo]()
$346
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 7/2911:51 pm
ONT
- BOS
1 stop8h 35m
JetBlue
Wed 8/124:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/5![JetBlue logo]()
$265
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.
Wed 7/2911:51 pm
ONT
- BOS
1 stop8h 35m
JetBlue
Tue 8/182:45 pm
BOS
- ONT
1 stop10h 50m
JetBlue
Deal found 6/5![JetBlue logo]()
$294
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 7/2911:51 pm
ONT
- BOS
1 stop8h 35m
JetBlue
Tue 8/112:45 pm
BOS
- ONT
1 stop10h 50m
JetBlue
Deal found 6/5![JetBlue logo]()
$296
One-way flights from Ontario to MaineSearch for one-way flight options from Ontario to Maine. Find affordable one-way fares based on user searches. Data last updated June 8, 2026.
Search for one-way flight options from Ontario to Maine. Find affordable one-way fares based on user searches. Data last updated June 8, 2026.
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.
Sun 7/1211:58 pm
ONT
- BOS
1 stop8h 35m
JetBlue
Deal found 6/7![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.
Tue 8/1811:50 pm
ONT
- BOS
1 stop8h 31m
JetBlue
Deal found 6/4![JetBlue logo]()
$124
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 8/411:51 pm
ONT
- BOS
1 stop11h 31m
JetBlue
Deal found 6/8![JetBlue logo]()
$129
This JetBlue 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:50 pm
ONT
- BOS
1 stop8h 26m
JetBlue
Deal found 6/8![JetBlue logo]()
$133
This Jetabroad 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1411:50 pm
ONT
- BOS
1 stop8h 31m
JetBlue
Deal found 6/6![JetBlue logo]()
$135
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.
Tue 7/2811:51 pm
ONT
- PWM
1 stop10h 54m
JetBlue
Deal found 6/4![JetBlue logo]()
$138
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 8/2812:00 pm
ONT
- PWM
1 stop8h 13m
Delta
Deal found 6/8![Delta logo]()
$149
This Jettzy 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:14 pm
ONT
- BOS
1 stop8h 55m
Alaska Airlines
Deal found 6/7![Alaska Airlines logo]()
$150
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.
Mon 9/1411:55 pm
ONT
- BOS
1 stop7h 00m
Southwest
Deal found 6/7![Southwest logo]()
$152
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.
Mon 7/1311:51 pm
ONT
- BOS
1 stop8h 42m
JetBlue
Deal found 6/7![JetBlue logo]()
$155
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.
Wed 7/2211:51 pm
ONT
- BOS
1 stop8h 35m
JetBlue
Deal found 6/7![JetBlue logo]()
$156
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.
Wed 7/85:54 pm
ONT
- BOS
1 stop10h 46m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$159
Find flight deals from Ontario to Maine
Keep the following information in mind while searching for Ontario to Maine flight deals. Data was last updated June 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $216 (Southwest) |
One-way from | $123 (Super.com) |
Popular in | December |
Cheapest in | September |
Average price | $456 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Maine 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 8, 2026.
Use the filters below to find and compare flights from Ontario to Maine that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Tue 8/11
11:55 pm-12:15 pm
1 stop9h 20m
Boston Logan Intl
Tue 8/18
2:45 pm-10:00 pm
2 stops10h 15m
$277
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Thu 10/15
11:55 am-12:20 am
1 stop9h 25m
Boston Logan Intl
Sat 10/17
5:45 am-11:27 am
1 stop8h 42m
$317
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Tue 7/7
2:50 pm-12:50 am
1 stop7h 00m
Boston Logan Intl
Wed 7/29
5:25 am-12:05 pm
1 stop9h 40m
$317
Quickest round-trip
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Wed 9/16
11:55 pm-11:40 am
1 stop8h 45m
Boston Logan Intl
Sun 9/20
5:20 am-10:00 am
1 stop7h 40m
$327
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Mon 9/14
6:14 pm-6:09 am
1 stop8h 55m
Boston Logan Intl
Wed 9/23
7:12 am-2:16 pm
1 stop10h 04m
$338
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Mon 9/14
6:14 pm-6:09 am
1 stop8h 55m
Boston Logan Intl
Tue 9/29
9:33 am-5:18 pm
1 stop10h 45m
$338
OntarioPortland
ONT - PWM
ONTPWM
Ontario
Mon 8/10
11:50 pm-12:17 pm
1 stop9h 27m
Portland
Wed 8/19
2:40 pm-10:35 pm
1 stop10h 55m
$339
OntarioPortland
ONT - PWM
ONTPWM
Ontario
Sat 7/4
7:05 am-5:56 pm
1 stop7h 51m
Portland
Thu 7/9
1:55 pm-9:50 pm
1 stop10h 55m
$351
OntarioPortland
ONT - PWM
ONTPWM
Ontario
Mon 9/14
11:59 am-11:25 pm
1 stop8h 26m
Portland
Sat 9/19
6:02 am-6:33 pm
2 stops15h 31m
$356
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Mon 8/17
5:32 pm-6:20 am
1 stop9h 48m
Boston Logan Intl
Sat 9/12
9:33 am-5:18 pm
1 stop10h 45m
$359
Showing 1-10 of 58 resultsSorted by cheapest first
Best time to book a flight from Ontario to Maine
Have a flexible travel schedule? Discover the best time to fly to Maine from Ontario with our price prediction graph.
ONT-BOS
ONT-PWM
ONT-BGR
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Maine
ONT-USME
ONT-BOS
ONT-PWM
ONT-BGR
How much does it cost to fly round-trip from Ontario to Maine?
Reviews of airlines servicing Maine
Get insights into the airlines that provide service to Maine. 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 Maine. Reviews last updated June 8, 2026.
See what other customers who have flown with Southwest,United Airlines, andAmerican Airlines from Ontario to Maine have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from Ontario to Maine. 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
Other flight options
Popular flights
Top destinations
Alternative routes for Ontario to Maine
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Maine by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Maine by cabin class
Find flights from Ontario to Maine, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Maine flights
Browse other Ontario and Maine flight options. Last updated on June 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Ontario to Maine flights
Consider these flights traveling from Ontario to Maine.
Top 3 airlines flying from Ontario to Maine
Discover the top 3 airlines that operate flights from Ontario to Maine. 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 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$256 | Average$535 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$383 | Average$613 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$396 | Average$466 | FlexibilityNo cancel fee | On-time69% |