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Ontario

$123+ 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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — ONT
Jul 7 — Jul 141
Tue 7/7
Tue 7/14
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 June 7, 2026.

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 8/192:40 pm
PWM
-
ONT
1 stop10h 55m
JetBlue
Sat 8/2211:24 pm
ONT
-
PWM
1 stop9h 57m
JetBlue
Deal found 6/7$296
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/31:55 pm
PWM
-
ONT
1 stop10h 53m
Delta
Tue 7/711:48 am
ONT
-
PWM
1 stop8h 26m
Delta
Deal found 6/6$297
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.
Tue 9/17:12 am
BOS
-
ONT
1 stop9h 57m
Alaska Airlines
Sat 9/56:05 pm
ONT
-
BOS
1 stop9h 04m
Alaska Airlines
Deal found 6/3$359
This American Airlines deal was found by Cheapflights users on 6/2. 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.
Wed 7/18:01 am
BOS
-
ONT
1 stop8h 27m
American Airlines
Tue 7/77:15 pm
ONT
-
BOS
1 stop7h 30m
American Airlines
Deal found 6/2$362
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.
Thu 8/202:40 pm
PWM
-
ONT
1 stop10h 55m
JetBlue
Sun 8/2311:50 pm
ONT
-
PWM
1 stop10h 55m
JetBlue
Deal found 6/5$362
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/177:00 am
BOS
-
ONT
1 stop8h 02m
American Airlines
Wed 8/1912:59 pm
ONT
-
BOS
1 stop7h 25m
American Airlines
Deal found 6/4$367
This Delta deal was found by Cheapflights users on 6/2. 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 9/286:05 am
BOS
-
ONT
1 stop9h 05m
Delta
Tue 9/295:13 pm
ONT
-
BOS
1 stop10h 17m
Delta
Deal found 6/2$368
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/166:00 am
PWM
-
ONT
2 stops13h 01m
American Airlines
Wed 1/66:00 am
ONT
-
PWM
2 stops14h 40m
American Airlines
Deal found 6/7$371
This Travelocity 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/210:45 am
BOS
-
ONT
2 stops14h 54m
Alaska Airlines
Tue 12/812:00 pm
ONT
-
BOS
1 stop9h 05m
Alaska Airlines
Deal found 6/7$372
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.
Thu 8/64:30 pm
BOS
-
ONT
1 stop9h 05m
JetBlue
Fri 8/1411:50 pm
ONT
-
BOS
1 stop8h 31m
JetBlue
Deal found 6/5$373
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 6/305:00 am
BOS
-
ONT
1 stop10h 40m
Southwest
Tue 7/145:30 am
ONT
-
BOS
2 stops9h 30m
Southwest
Deal found 6/5$374
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.
Fri 7/105:09 pm
BOS
-
ONT
1 stop8h 27m
JetBlue
Mon 7/1311:51 pm
ONT
-
BOS
1 stop8h 42m
JetBlue
Deal found 6/5$377

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 June 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$296
(JetBlue)

One-way from

$123
(Super.com)

Popular in

June

Cheapest in

September

Average price

$474
Provider with most accurate pricing for Portland-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Los Angeles flights.
Search Deals
From Maine to Ontario
Search Deals
One-way flight from Maine to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 7, 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

PortlandOntario

PWM - ONT

PWMONT

Portland

Wed 8/19

2:40 pm-10:35 pm

1 stop10h 55m

Ontario

Sat 8/22

11:24 pm-12:21 pm

1 stop9h 57m

$296

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 8/20

2:40 pm-10:35 pm

1 stop10h 55m

Ontario

Sun 8/23

11:50 pm-1:45 pm

1 stop10h 55m

$362

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 7/3

4:30 pm-9:48 pm

1 stop8h 18m

Ontario

Wed 9/16

11:59 am-1:17 am

1 stop10h 18m

$383

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 8/13

6:05 am-12:05 pm

1 stop9h 00m

Ontario

Mon 8/17

10:00 pm-9:39 am

1 stop8h 39m

$388

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 7/3

5:20 pm-10:25 pm

1 stop8h 05m

Ontario

Wed 7/29

5:30 am-6:00 pm

2 stops9h 30m

$394

PortlandOntario

PWM - ONT

PWMONT

Portland

Wed 7/22

5:30 am-12:40 pm

2 stops10h 10m

Ontario

Wed 7/29

8:30 am-11:00 pm

2 stops11h 30m

$403

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 9/2

9:33 am-5:10 pm

1 stop10h 37m

Ontario

Sun 9/6

6:05 pm-6:09 am

1 stop9h 04m

$418

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 7/1

3:54 pm-9:55 pm

1 stop9h 01m

Ontario

Sat 7/4

6:00 am-5:04 pm

1 stop8h 04m

$427

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 7/3

10:20 am-6:30 pm

1 stop11h 10m

Ontario

Wed 7/15

11:48 am-11:36 pm

1 stop8h 48m

$437

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 6/23

6:05 am-12:10 pm

1 stop9h 05m

Ontario

Mon 6/29

5:59 pm-7:35 am

1 stop10h 36m

$437

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/3

Showing 1-10 of 52 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 05m. 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 Southwest and United Airlines, with prices starting from $180 and $188, 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 airline flying from Maine to Ontario

Discover the top airline 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 June 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$279Average$528FlexibilityNo cancel feeOn-time71%

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