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Ontario

$114+ Cheap flights from Maine to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — ONT
May 18 — May 251
Mon 5/18
Mon 5/25
1 adult, Economy
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Cheap flight deals from Maine to Ontario

Cheapest flights from Maine to Ontario
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 April 18, 2026.

This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/66:15 am
BOS
-
ONT
1 stop8h 59m
Delta
Mon 5/111:29 pm
ONT
-
BOS
1 stop7h 29m
Delta
Deal found 4/13$297
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 4/3012:45 pm
BOS
-
ONT
1 stop8h 48m
Delta
Sat 5/910:00 pm
ONT
-
BOS
1 stop8h 46m
Delta
Deal found 4/16$298
This American Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” 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 5/123:18 pm
BOS
-
ONT
1 stop10h 22m
American Airlines
Tue 6/27:12 pm
ONT
-
BOS
2 stops10h 29m
American Airlines
Deal found 4/15$302
This Alaska Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/57:00 am
BOS
-
ONT
1 stop10h 32m
Alaska Airlines
Sat 5/910:39 am
ONT
-
BOS
1 stop10h 20m
Alaska Airlines
Deal found 4/13$309
This Alaska Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 4/287:00 am
BOS
-
ONT
1 stop10h 32m
Alaska Airlines
Tue 5/510:39 am
ONT
-
BOS
1 stop10h 20m
Alaska Airlines
Deal found 4/13$313
This Alaska Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/25:05 pm
BOS
-
ONT
1 stop9h 43m
Alaska Airlines
Wed 5/610:39 am
ONT
-
BOS
1 stop10h 20m
Alaska Airlines
Deal found 4/16$317
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” 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 8/206:00 am
BOS
-
ONT
1 stop9h 29m
Delta
Tue 8/2510:59 pm
ONT
-
BOS
1 stop10h 42m
Delta
Deal found 4/17$318
This American Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:05 pm
BOS
-
ONT
1 stop7h 52m
American Airlines
Mon 6/17:12 pm
ONT
-
BOS
2 stops10h 29m
American Airlines
Deal found 4/17$323
This American Airlines deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 4/2811:11 am
BOS
-
ONT
2 stops10h 13m
American Airlines
Fri 5/17:35 pm
ONT
-
BOS
2 stops10h 52m
American Airlines
Deal found 4/14$327
This JetBlue deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 6/92:37 pm
PWM
-
ONT
1 stop9h 10m
JetBlue
Tue 6/1611:53 pm
ONT
-
PWM
1 stop10h 42m
JetBlue
Deal found 4/16$329
This JetBlue deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/112:30 pm
PWM
-
ONT
1 stop11h 08m
JetBlue
Tue 6/1611:53 pm
ONT
-
PWM
1 stop10h 42m
JetBlue
Deal found 4/16$366
This KAYAK deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/62:40 pm
PWM
-
ONT
1 stop10h 55m
JetBlue
Sun 8/911:50 pm
ONT
-
PWM
1 stop9h 31m
JetBlue
Deal found 4/14$429

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 April 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$297
(Delta)

One-way from

$114
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$408
Provider with most accurate pricing for Portland-Los Angeles Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Los Angeles Los Angeles flights.
Search Deals
From Maine to Ontario
Search Deals
One-way flight from Maine to Ontario
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

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 2,558,603 searches. Data last updated April 18, 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

Price

Cheapest round-trip

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 5/26

6:10 am-12:19 pm

1 stop9h 09m

Ontario

Wed 6/10

5:24 pm-6:05 am

1 stop9h 41m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 5/6

7:00 am-2:30 pm

1 stop10h 30m

Ontario

Sat 5/9

10:39 am-11:59 pm

1 stop10h 20m

$309

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sun 5/24

6:10 am-12:19 pm

1 stop9h 09m

Ontario

Mon 6/1

10:00 pm-9:46 am

1 stop8h 46m

$318
Quickest round-trip

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 5/23

5:00 pm-10:46 pm

1 stop8h 46m

Ontario

Wed 5/27

6:30 pm-5:58 am

1 stop8h 28m

$330

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 5/9

6:10 am-12:19 pm

1 stop9h 09m

Ontario

Fri 5/15

10:00 pm-9:46 am

1 stop8h 46m

$348

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 4/29

6:15 am-12:14 pm

1 stop8h 59m

Ontario

Sat 5/9

10:00 pm-9:46 am

1 stop8h 46m

$358

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 4/22

7:00 am-2:32 pm

1 stop10h 32m

Ontario

Wed 5/6

10:39 am-11:59 pm

1 stop10h 20m

$364

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 5/26

7:48 am-5:10 pm

1 stop12h 22m

Ontario

Mon 6/8

5:24 pm-6:05 am

1 stop9h 41m

$378

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 5/4

7:00 am-2:32 pm

1 stop10h 32m

Ontario

Wed 5/6

10:39 am-11:59 pm

1 stop10h 20m

$397

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 4/25

5:05 pm-11:48 pm

1 stop9h 43m

Ontario

Wed 4/29

10:39 am-11:59 pm

1 stop10h 20m

$419

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 54 resultsSorted by cheapest first
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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.
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
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.

  • What airport do you fly into for flights to Ontario from Maine?

    If you book a flight to Ontario from Maine, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • How long is the flight from Maine to Ontario?

    Departing from Maine to Ontario will take you 8h 46m. The distance from Maine to Ontario is about 2559 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Maine to Ontario one-way?

    $148 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on American Airlines and Southwest, with prices starting from $160 and $180, respectively.

  • What are the most popular routes from Maine to Ontario?

    The most popular route from Maine to Ontario is Boston Logan Intl - Ontario. You may also consider Portland - Ontario or Bangor - Ontario.

  • Can I find deals for flights from Maine to Ontario that include hotel bookings?

    Yes. In addition to deals on Maine to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Maine to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Maine to Ontario.

  • Can I find deals for business class flights from Maine to Ontario?

    Yes. Cheapflights offers flight deals from Maine to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Maine to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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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 2,558,603 searches. Data last updated April 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$196Average$322FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$279Average$528FlexibilityNo cancel feeOn-time71%

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