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Maine

$114+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PWM
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Ontario to Maine

Keep the following information in mind while searching for Ontario to Maine flight deals. Data was last updated July 31, 2025.

Round-trip from

$266
(lastminute.com)

One-way from

$114
(FlyFar)

Popular in

December

Cheapest in

January

Average price

$472
From Ontario to Maine
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One-way flight from Ontario to Maine
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Highest demand for flights based on searches. 7% potential increase in price ($36 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Ontario to Maine

Cheapest flights from Ontario to Maine
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 July 31, 2025.

This lastminute.com deal was found by Cheapflights users on 7/30. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/610:56 pmONT - BOS
1 stop7h 38mJetBlue
Tue 9/162:45 pmBOS - ONT
1 stop9h 44mJetBlue
Deal found 7/30$266
This American Airlines deal was found by Cheapflights users on 7/31. 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 8/317:32 pmONT - BOS
1 stop7h 41mAmerican Airlines
Thu 9/42:38 pmBOS - ONT
1 stop10h 55mAmerican Airlines
Deal found 7/31$273
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 9/911:39 amONT - BOS
1 stop9h 48mAlaska Airlines
Tue 9/167:20 amBOS - ONT
1 stop9h 52mAlaska Airlines
Deal found 7/29$277
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/55:49 pmONT - BOS
1 stop9h 11mHawaiian Airlines
Wed 9/107:20 amBOS - ONT
1 stop9h 52mHawaiian Airlines
Deal found 7/29$284
This JetBlue deal was found by Cheapflights users on 7/29. 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 9/910:56 pmONT - PWM
1 stop11h 26mJetBlue
Wed 9/172:17 pmPWM - ONT
1 stop10h 12mJetBlue
Deal found 7/29$291
This Delta deal was found by Cheapflights users on 7/30. 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 9/411:45 amONT - BOS
1 stop10h 39mDelta
Wed 9/101:35 pmBOS - ONT
1 stop8h 36mDelta
Deal found 7/30$295
This American Airlines deal was found by Cheapflights users on 7/29. 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 8/304:54 pmONT - PWM
2 stops15h 40mAmerican Airlines
Thu 9/112:43 pmPWM - ONT
1 stop9h 28mAmerican Airlines
Deal found 7/29$295
This Delta deal was found by Cheapflights users on 7/30. 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 9/811:45 amONT - PWM
1 stop9h 18mDelta
Tue 9/161:40 pmPWM - ONT
2 stops11h 43mDelta
Deal found 7/30$302
This Southwest deal was found by Cheapflights users on 7/29. 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 8/1510:35 amONT - BOS
1 stop9h 00mSouthwest
Sat 8/238:00 amBOS - ONT
1 stop10h 45mSouthwest
Deal found 7/29$318
This United Airlines deal was found by Cheapflights users on 7/28. 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 8/197:00 amONT - PWM
1 stop7h 42mUnited Airlines
Sat 8/305:02 pmPWM - ONT
1 stop8h 28mUnited Airlines
Deal found 7/28$344
This Delta deal was found by Cheapflights users on 7/28. 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 9/37:05 amONT - BGR
2 stops13h 29mDelta
Sat 9/66:00 amBGR - ONT
2 stops16h 11mDelta
Deal found 7/28$391
This Southwest deal was found by Cheapflights users on 7/30. 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 9/2410:55 amONT - PWM
1 stop8h 30mSouthwest
Sat 10/410:45 amPWM - ONT
1 stop10h 45mSouthwest
Deal found 7/30$399

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 July 31, 2025.
Use the filters below to find and compare flights from Ontario to Maine that are best for you.

Fly from

Ontario

Fly to

Maine

Route

Depart

Return

Price

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 9/6

10:56 pm-9:34 am

1 stop7h 38m

Boston Logan Intl

Tue 9/16

2:45 pm-9:29 pm

1 stop9h 44m

$266

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 8/31

7:32 pm-6:13 am

1 stop7h 41m

Boston Logan Intl

Thu 9/4

2:38 pm-10:33 pm

1 stop10h 55m

$273

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 9/9

11:39 am-12:27 am

1 stop9h 48m

Boston Logan Intl

Tue 9/16

7:20 am-2:12 pm

1 stop9h 52m

$277

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 9/5

5:49 pm-6:00 am

1 stop9h 11m

Boston Logan Intl

Wed 9/10

7:20 am-2:12 pm

1 stop9h 52m

$284

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 9/9

10:56 pm-1:22 pm

1 stop11h 26m

Portland

Wed 9/17

2:17 pm-9:29 pm

1 stop10h 12m

$291

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 9/4

11:45 am-1:24 am

1 stop10h 39m

Boston Logan Intl

Wed 9/10

1:35 pm-7:11 pm

1 stop8h 36m

$295

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 8/30

4:54 pm-11:34 am

2 stops15h 40m

Portland

Thu 9/11

2:43 pm-9:11 pm

1 stop9h 28m

$295

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Mon 9/8

11:45 am-12:03 am

1 stop9h 18m

Portland

Tue 9/16

1:40 pm-10:23 pm

2 stops11h 43m

$302

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 8/15

10:35 am-10:35 pm

1 stop9h 00m

Boston Logan Intl

Sat 8/23

8:00 am-3:45 pm

1 stop10h 45m

$318

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 8/19

7:00 am-5:42 pm

1 stop7h 42m

Portland

Sat 8/30

5:02 pm-10:30 pm

1 stop8h 28m

$344

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 31 results
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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.
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

What is the cheapest month to book a flight from Ontario to Maine?

Currently, January is the cheapest month in which you can book a flight from Ontario to Maine (average of $296). Flying from Ontario to Maine in July is currently the most expensive (average of $394). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to ME?

Find hourly flight availability from Ontario to Maine. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Maine as you normally would.

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 July 31, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,244 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,610 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,902 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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.

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

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

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

    One-way options have recently been found by users for as low as $114 on Frontier. Other airlines that offer cheap prices include American Airlines from $127 and Alaska Airlines from $138 one-way.

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

    When deciding which route to take from Ontario to Maine consider Ontario - Boston Logan Intl, Ontario - Portland or Ontario - Bangor as they are the most popular.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Ontario to Maine?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Maine (average of $296). Flying from Ontario to Maine in July is currently the most expensive (average of $394). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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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.
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Top 5 airlines flying from Ontario to Maine

Discover the top 5 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$259Average$439FlexibilityNo cancel feeOn-time62%
DeltaCheapest$287Average$491FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$300Average$518FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$356Average$447FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$523Average$727FlexibilityNo cancel feeOn-time63%

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