$154+ Cheap flights from Ontario (ONT) to Maine
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 12/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PWM
Nov 24 — Dec 11
Round-trip
1 adult, Economy
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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
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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 October 25, 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 October 25, 2026.
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 12/75:55 pm -
2 stops15h 02m
Thu 12/104:53 pm -
2 stops10h 04m
Deal found 10/20![Delta logo]()
$348
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.
Fri 11/65:00 am -
1 stop8h 02m
Tue 11/105:30 am -
2 stops13h 03m
Deal found 10/22![United Airlines logo]()
$369
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.
Wed 11/1112:18 pm -
1 stop8h 13m
Mon 11/162:05 pm -
1 stop10h 52m
Deal found 10/20![Delta logo]()
$388
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.
Thu 11/55:00 am -
1 stop8h 02m
Wed 11/113:23 pm -
1 stop8h 28m
Deal found 10/20![United Airlines logo]()
$390
This Delta deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/56:00 pm -
2 stops13h 50m
Wed 11/112:05 pm -
1 stop9h 49m
Deal found 10/19![Delta logo]()
$394
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.
Fri 11/66:00 pm -
2 stops13h 50m
Tue 11/104:03 pm -
2 stops10h 46m
Deal found 10/22![Delta logo]()
$433
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/189:50 am -
2 stops11h 05m
Sat 1/165:05 am -
2 stops14h 15m
Deal found 10/24![Southwest logo]()
$457
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/105:00 am -
1 stop8h 02m
Wed 11/113:23 pm -
1 stop8h 28m
Deal found 10/21![United Airlines logo]()
$465
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/74:51 pm -
2 stops14h 18m
Wed 11/1112:25 pm -
2 stops14h 21m
Deal found 10/23![American Airlines logo]()
$834
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 12/197:36 pm -
2 stops11h 40m
Sat 1/210:45 am -
2 stops15h 09m
Deal found 10/21![American Airlines logo]()
$918
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.
Sun 11/86:37 pm -
2 stops12h 42m
Thu 11/1211:00 am -
2 stops14h 48m
Deal found 10/24![United Airlines logo]()
$968
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.
Sat 11/74:17 pm -
2 stops15h 02m
Wed 11/1111:00 am -
3 stops12h 51m
Deal found 10/23![United Airlines logo]()
$1,039
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 October 25, 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 October 25, 2026.
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.
Thu 11/55:00 am -
1 stop8h 02m
Wed 11/113:23 pm -
1 stop8h 28m
Deal found 10/20![United Airlines logo]()
$390
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.
Wed 4/1410:59 pm -
2 stops10h 37m
Wed 4/216:00 am -
2 stops15h 22m
Deal found 10/20![Delta logo]()
$439
This United Airlines deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:00 am -
2 stops14h 21m
Wed 11/118:47 am -
2 stops12h 14m
Deal found 10/19![United Airlines logo]()
$475
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.
Sat 4/1712:00 pm -
2 stops31h 01m
Wed 4/216:00 am -
2 stops15h 22m
Deal found 10/20![Delta logo]()
$527
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/105:00 am -
1 stop8h 02m
Mon 11/163:23 pm -
1 stop8h 28m
Deal found 10/21![United Airlines logo]()
$493
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.
Thu 4/17:00 am -
2 stops13h 23m
Wed 4/72:00 pm -
2 stops11h 14m
Deal found 10/20![Delta logo]()
$539
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.
Wed 11/46:00 am -
2 stops14h 21m
Sun 11/83:23 pm -
1 stop8h 28m
Deal found 10/20![United Airlines logo]()
$511
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 12/1711:08 pm -
2 stops13h 12m
Sat 1/165:30 am -
1 stop9h 28m
Deal found 10/24![Delta logo]()
$544
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/136:00 am -
2 stops13h 57m
Tue 4/205:45 am -
2 stops15h 02m
Deal found 10/21![United Airlines logo]()
$519
This United Airlines deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/63:59 pm -
2 stops15h 45m
Tue 2/911:30 am -
2 stops12h 30m
Deal found 10/19![United Airlines logo]()
$539
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.
Sat 12/1911:14 am -
1 stop8h 55m
Sat 1/165:30 am -
1 stop9h 28m
Deal found 10/24![Delta logo]()
$639
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.
Tue 11/246:00 am -
2 stops14h 21m
Thu 11/268:08 am -
1 stop10h 51m
Deal found 10/22![United Airlines logo]()
$553
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.
Tue 11/36:00 am -
2 stops14h 21m
Mon 11/93:23 pm -
1 stop8h 28m
Deal found 10/20![United Airlines logo]()
$616
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.
Tue 3/305:00 am -
2 stops14h 04m
Tue 4/68:00 am -
3 stops18h 06m
Deal found 10/20![United Airlines logo]()
$734
Last-minute flights from Ontario to MaineDiscover last-minute flight deals from Ontario to Maine. Data last updated October 25, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Maine. Data last updated October 25, 2026 and is based on user searches.
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.
Wed 11/48:40 am -
2 stops10h 10m
Sun 11/85:20 am -
2 stops11h 45m
Deal found 10/20![Southwest logo]()
$491
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.
Thu 11/55:00 am -
1 stop8h 02m
Wed 11/113:23 pm -
1 stop8h 28m
Deal found 10/20![United Airlines logo]()
$390
This Delta deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/56:00 pm -
2 stops13h 50m
Wed 11/112:05 pm -
1 stop9h 49m
Deal found 10/19![Delta logo]()
$394
This Southwest deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/511:25 am -
2 stops9h 30m
Wed 11/1112:45 pm -
2 stops12h 00m
Deal found 10/19![Southwest logo]()
$479
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.
Fri 11/65:00 am -
1 stop8h 02m
Tue 11/105:30 am -
2 stops13h 03m
Deal found 10/22![United Airlines logo]()
$369
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.
Fri 11/66:00 pm -
2 stops13h 50m
Tue 11/104:03 pm -
2 stops10h 46m
Deal found 10/22![Delta logo]()
$433
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/74:51 pm -
2 stops14h 18m
Wed 11/1112:25 pm -
2 stops14h 21m
Deal found 10/23![American Airlines logo]()
$834
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.
Sat 11/74:17 pm -
2 stops15h 02m
Wed 11/1111:00 am -
3 stops12h 51m
Deal found 10/23![United Airlines logo]()
$1,039
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.
Sun 11/86:37 pm -
2 stops12h 42m
Thu 11/1211:00 am -
2 stops14h 48m
Deal found 10/24![United Airlines logo]()
$968
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/105:00 am -
1 stop8h 02m
Wed 11/113:23 pm -
1 stop8h 28m
Deal found 10/21![United Airlines logo]()
$465
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.
Wed 11/1112:18 pm -
1 stop8h 13m
Mon 11/162:05 pm -
1 stop10h 52m
Deal found 10/20![Delta logo]()
$388
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 October 25, 2026.
Search for one-way flight options from Ontario to Maine. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.
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 12/146:40 pm -
2 stops11h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![United Airlines logo]()
$154
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.
Fri 12/1812:20 pm -
1 stop8h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Delta logo]()
$156
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.
Sun 12/139:55 am -
2 stops11h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Southwest logo]()
$165
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.
Wed 11/1112:18 pm -
1 stop8h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Delta logo]()
$173
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1411:30 am -
3 stops42h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$209
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/105:00 am -
1 stop8h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![United Airlines logo]()
$214
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.
Sat 12/1910:35 pm -
2 stops10h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Delta logo]()
$228
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.
Fri 12/186:30 pm -
2 stops11h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Southwest logo]()
$246
This United Airlines deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/195:00 am -
1 stop8h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![United Airlines logo]()
$254
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:00 am -
2 stops14h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![United Airlines logo]()
$257
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/197:10 pm -
3 stops34h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$260
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.
Tue 11/244:01 pm -
2 stops15h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Alaska Airlines logo]()
$561
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 October 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $258 (Southwest) |
One-way from | $154 (United Airlines) |
Popular in | July |
Cheapest in | February |
Average price | $565 |
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 7,457,451 searches. Data last updated October 25, 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
OntarioPortland
ONT Ontario - PWM Portland
ONTPWM
Ontario
Mon 12/14
6:40 pm-9:05 am
2 stops11h 25m
Portland
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$154
OntarioPortland
ONT Ontario - PWM Portland
ONTPWM
Ontario
Fri 12/18
12:20 pm-11:52 pm
1 stop8h 32m
Portland
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$156
OntarioPortland
ONT Ontario - PWM Portland
ONTPWM
Ontario
Sun 12/13
9:55 am-11:55 pm
2 stops11h 00m
Portland
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$165
OntarioPortland
ONT Ontario - PWM Portland
ONTPWM
Ontario
Wed 11/25
5:00 am-4:02 pm
1 stop8h 02m
Portland
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$214
OntarioPortland
ONT Ontario - PWM Portland
ONTPWM
Ontario
Wed 11/18
5:00 am-4:02 pm
1 stop8h 02m
Portland
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$214
OntarioPortland
ONT Ontario - PWM Portland
ONTPWM
Ontario
Fri 12/18
6:30 pm-9:25 am
2 stops11h 55m
Portland
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$246
OntarioPortland
ONT Ontario - PWM Portland
ONTPWM
Ontario
Thu 11/19
5:00 am-4:02 pm
1 stop8h 02m
Portland
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$254
OntarioPortland
ONT Ontario - PWM Portland
ONTPWM
Ontario
Sat 12/12
7:00 am-9:30 pm
2 stops11h 30m
Portland
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$257
Quickest round-trip
OntarioPortland
ONT Ontario - PWM Portland
ONTPWM
Ontario
Thu 12/31
11:10 am-9:50 pm
1 stop7h 40m
Portland
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$279
OntarioPortland
ONT Ontario - PWM Portland
ONTPWM
Ontario
Tue 11/24
5:00 am-4:02 pm
1 stop8h 02m
Portland
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$360
Showing 1-10 of 25 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-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-PWM
ONT-BGR
No data available for this route at this time. Please check back soon.
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 October 25, 2026.
See what other customers who have flown with United Airlines and American 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.
Overall
7.3
Comfort
7.3
Entertainment
7.1
Boarding
7.7
Crew
8.1
Food
6.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Overall
7.3
Comfort
7.3
Entertainment
7.1
Boarding
7.7
Crew
8.1
Food
6.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Overall
7.3
Comfort
7.3
Entertainment
7.1
Boarding
7.7
Crew
8.1
Food
6.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
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.
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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 October 25, 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 2 airlines flying from Ontario to Maine
Discover the top 2 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 7,457,451 searches. Data last updated October 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$379 | Average$574 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$409 | Average$466 | FlexibilityNo cancel fee | On-time69% |