$135+ Cheap flights from Maine to Ontario (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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — ONT
Nov 23 — Nov 301
Round-trip
1 adult, Economy
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Find cheap flights from Maine to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Maine to Ontario
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Cheapest flights from Maine to OntarioExplore the most affordable flight options available from Maine to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 24, 2026.
Explore the most affordable flight options available from Maine to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 24, 2026.
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.
Fri 12/412:45 pm -
2 stops12h 00m
Sun 12/69:55 am -
2 stops11h 00m
Deal found 10/22![Southwest logo]()
$325
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.
Mon 11/93:23 pm -
1 stop8h 28m
Wed 11/115:00 am -
1 stop8h 02m
Deal found 10/20![United Airlines logo]()
$337
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.
Wed 11/183:23 pm -
1 stop8h 28m
Tue 12/85:00 am -
2 stops12h 42m
Deal found 10/22![United Airlines logo]()
$382
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 11/72:09 pm -
1 stop8h 21m
Sat 11/1412:18 pm -
1 stop8h 13m
Deal found 10/20![Delta logo]()
$389
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 12/412:06 pm -
2 stops12h 49m
Sun 12/611:08 pm -
2 stops12h 57m
Deal found 10/21![Delta logo]()
$409
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 12/412:06 pm -
2 stops12h 49m
Wed 12/97:05 am -
2 stops13h 21m
Deal found 10/21![Delta logo]()
$479
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.
Tue 12/13:45 pm -
2 stops28h 30m
Mon 12/711:08 pm -
2 stops12h 57m
Deal found 10/21![Delta logo]()
$482
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 12/53:45 pm -
2 stops22h 32m
Mon 12/711:08 pm -
2 stops12h 57m
Deal found 10/20![Delta 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 12/33:45 pm -
2 stops11h 12m
Fri 12/115:04 pm -
2 stops19h 01m
Deal found 10/20![Delta logo]()
$497
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 12/412:06 pm -
2 stops12h 49m
Fri 12/1111:08 pm -
2 stops12h 57m
Deal found 10/21![Delta logo]()
$508
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 12/23:45 pm -
2 stops28h 30m
Mon 12/711:08 pm -
2 stops12h 57m
Deal found 10/21![Delta logo]()
$522
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 12/34:52 pm -
2 stops21h 15m
Mon 12/711:08 pm -
2 stops12h 57m
Deal found 10/21![Delta logo]()
$523
Best flights from Maine to OntarioDiscover carefully curated flight deals from Maine to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 24, 2026.
Discover carefully curated flight deals from Maine to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 24, 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.
Mon 11/93:23 pm -
1 stop8h 28m
Wed 11/115:00 am -
1 stop8h 02m
Deal found 10/20![United Airlines logo]()
$337
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 11/72:09 pm -
1 stop8h 21m
Sat 11/1412:18 pm -
1 stop8h 13m
Deal found 10/23![Delta logo]()
$399
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.
Fri 11/205:20 am -
2 stops11h 45m
Sun 11/229:55 am -
2 stops11h 00m
Deal found 10/20![Southwest logo]()
$552
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/156:00 am -
2 stops13h 20m
Mon 12/217:36 pm -
2 stops11h 40m
Deal found 10/24![American Airlines logo]()
$562
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.
Fri 12/43:45 pm -
2 stops11h 12m
Sat 12/121:11 pm -
2 stops22h 54m
Deal found 10/20![Delta logo]()
$482
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 11/710:50 am -
2 stops13h 01m
Sat 11/147:00 am -
2 stops13h 21m
Deal found 10/23![United Airlines logo]()
$505
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.
Fri 12/43:45 pm -
2 stops28h 30m
Mon 12/711:08 pm -
2 stops12h 57m
Deal found 10/20![Delta logo]()
$482
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.
Mon 11/93:23 pm -
1 stop8h 28m
Mon 11/165:00 am -
1 stop8h 02m
Deal found 10/20![United Airlines logo]()
$507
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 12/53:45 pm -
2 stops22h 32m
Mon 12/711:08 pm -
2 stops12h 57m
Deal found 10/20![Delta logo]()
$493
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 11/188:47 am -
2 stops12h 14m
Wed 12/25:00 am -
2 stops12h 42m
Deal found 10/20![United Airlines logo]()
$543
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 12/34:52 pm -
2 stops21h 15m
Mon 12/711:08 pm -
2 stops12h 57m
Deal found 10/21![Delta logo]()
$523
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 11/78:49 am -
2 stops12h 12m
Wed 11/115:00 am -
1 stop8h 02m
Deal found 10/23![United Airlines logo]()
$562
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 12/33:45 pm -
2 stops11h 12m
Thu 12/1011:08 pm -
2 stops12h 57m
Deal found 10/21![Delta logo]()
$619
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.
Fri 11/611:00 am -
2 stops12h 51m
Mon 11/96:37 pm -
2 stops12h 42m
Deal found 10/23![United Airlines logo]()
$619
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.
Tue 12/13:45 pm -
2 stops28h 30m
Fri 12/1111:08 pm -
2 stops11h 09m
Deal found 10/21![Delta logo]()
$632
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 12/24:52 pm -
2 stops21h 15m
Wed 12/912:20 pm -
2 stops23h 45m
Deal found 10/20![Delta logo]()
$646
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 12/312:06 pm -
2 stops26h 01m
Fri 12/1111:08 pm -
2 stops11h 09m
Deal found 10/21![Delta logo]()
$673
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 12/24:52 pm -
2 stops32h 03m
Sat 12/1212:20 pm -
2 stops23h 45m
Deal found 10/20![Delta logo]()
$677
Last-minute flights from Maine to OntarioDiscover last-minute flight deals from Maine to Ontario. Data last updated October 24, 2026 and is based on user searches.
Discover last-minute flight deals from Maine to Ontario. Data last updated October 24, 2026 and is based on user searches.
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.
Fri 11/611:00 am -
2 stops12h 51m
Mon 11/96:37 pm -
2 stops12h 42m
Deal found 10/23![United Airlines logo]()
$619
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 11/72:09 pm -
1 stop8h 21m
Sat 11/1412:18 pm -
1 stop8h 13m
Deal found 10/20![Delta logo]()
$389
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.
Mon 11/93:23 pm -
1 stop8h 28m
Wed 11/115:00 am -
1 stop8h 02m
Deal found 10/20![United Airlines logo]()
$337
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.
Wed 11/183:23 pm -
1 stop8h 28m
Tue 12/85:00 am -
2 stops12h 42m
Deal found 10/22![United Airlines logo]()
$382
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/296:00 am -
2 stops12h 35m
Fri 12/1111:59 pm -
2 stops14h 50m
Deal found 10/20![American Airlines logo]()
$1,555
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/296:00 am -
2 stops12h 35m
Sun 12/611:59 pm -
2 stops13h 29m
Deal found 10/20![American Airlines logo]()
$1,636
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/296:00 am -
2 stops12h 35m
Tue 12/810:32 am -
2 stops10h 27m
Deal found 10/20![American Airlines logo]()
$1,639
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.
Mon 11/303:45 pm -
2 stops22h 32m
Mon 12/711:08 pm -
2 stops12h 57m
Deal found 10/21![Delta logo]()
$817
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:00 am -
2 stops12h 35m
Mon 12/711:59 pm -
2 stops12h 55m
Deal found 10/20![American Airlines logo]()
$1,405
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:00 am -
2 stops12h 35m
Thu 12/1010:32 am -
2 stops10h 27m
Deal found 10/20![American Airlines logo]()
$1,486
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:00 am -
2 stops12h 35m
Wed 12/910:32 am -
2 stops10h 27m
Deal found 10/20![American Airlines logo]()
$1,489
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:00 am -
2 stops12h 35m
Sun 12/67:49 pm -
2 stops11h 15m
Deal found 10/20![American Airlines logo]()
$1,558
One-way flights from Maine to OntarioSearch for one-way flight options from Maine to Ontario. Find affordable one-way fares based on user searches. Data last updated October 24, 2026.
Search for one-way flight options from Maine to Ontario. Find affordable one-way fares based on user searches. Data last updated October 24, 2026.
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 1/165:30 am -
2 stops13h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Southwest logo]()
$135
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.
Tue 11/102:05 pm -
1 stop9h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Delta logo]()
$149
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 11/112:05 pm -
1 stop9h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Delta logo]()
$230
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.
Mon 1/185:20 am -
2 stops12h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Southwest logo]()
$235
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.
Wed 11/115:09 pm -
3 stops44h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Multiple Airlines logo]()
$236
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.
Tue 11/105:09 pm -
3 stops26h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Multiple Airlines logo]()
$238
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.
Sat 11/72:09 pm -
1 stop8h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Delta logo]()
$241
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 1/182:35 pm -
2 stops12h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Delta logo]()
$245
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 11/133:53 pm -
3 stops45h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Multiple Airlines logo]()
$252
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.
Fri 11/205:20 am -
2 stops11h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Southwest logo]()
$257
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.
Thu 11/511:00 am -
2 stops14h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![United Airlines logo]()
$484
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/76:00 am -
2 stops15h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![American Airlines logo]()
$568
Find flight deals from Maine to Ontario
Keep the following information in mind while searching for Maine to Ontario flight deals. Data was last updated October 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $325 (Southwest) |
One-way from | $135 (Southwest) |
Popular in | July |
Cheapest in | February |
Average price | $482 |
Cheapflights Fare Finder
Customize your flight search to find flights from Maine 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 24, 2026.
Use the filters below to find and compare flights from Maine to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Fri 11/13
2:05 pm-9:57 pm
1 stop10h 52m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$241
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Tue 11/10
12:45 pm-9:45 pm
2 stops12h 00m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$246
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Sat 11/7
1:10 pm-10:43 pm
2 stops12h 33m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$246
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Thu 11/12
2:05 pm-11:49 pm
2 stops12h 44m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$246
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Fri 11/20
5:20 am-2:05 pm
2 stops11h 45m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$275
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Mon 11/9
3:23 pm-8:51 pm
1 stop8h 28m
Ontario
Wed 11/11
5:00 am-4:02 pm
1 stop8h 02m
$337
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Thu 10/29
2:09 pm-8:25 pm
1 stop9h 16m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$340
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Thu 10/29
5:50 am-3:33 pm
2 stops12h 43m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$345
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Tue 11/3
8:47 am-8:15 pm
2 stops14h 28m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$365
Quickest round-trip
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Sun 11/8
3:23 pm-8:51 pm
1 stop8h 28m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$375
Showing 1-10 of 36 resultsSorted by cheapest first
Best time to book a flight from Maine to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Maine with our price prediction graph.
PWM-ONT
BGR-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 Maine to Ontario
USME-ONT
PWM-ONT
BGR-ONT
No data available for this route at this time. Please check back soon.
Related info for your journey
Find useful and relevant information for your journey from Maine 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 Maine 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 Maine to Ontario by cabin class
Find flights from Maine 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 24, 2026.
Maine and Ontario flights
Browse other Maine and Ontario flight options. Last updated on October 24, 2026.
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Maine to Ontario flights
Consider these flights traveling from Maine to Ontario.
Top 2 airlines flying from Maine to Ontario
Discover the top 2 airlines that operate flights from Maine 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 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$302 | Average$373 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$360 | Average$484 | FlexibilityNo cancel fee | On-time71% |