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Maine

$82+ 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 12/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PWM
Dec 14 — Dec 211
Sun 12/14
Sun 12/21
1 adult, Economy
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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 November 14, 2025.

This American Airlines deal was found by Cheapflights users on 11/12. 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 12/186:10 amONT - BOS
1 stop8h 10mAmerican Airlines
Sat 1/106:00 amBOS - ONT
1 stop9h 03mAmerican Airlines
Deal found 11/12$254
This United Airlines deal was found by Cheapflights users on 11/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:34 pmONT - BOS
1 stop7h 00mUnited Airlines
Fri 12/51:30 pmBOS - ONT
1 stop11h 19mUnited Airlines
Deal found 11/13$271
This American Airlines deal was found by Cheapflights users on 11/12. 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 12/47:30 pmONT - BOS
1 stop6h 56mAmerican Airlines
Wed 12/106:10 amBOS - ONT
1 stop8h 50mAmerican Airlines
Deal found 11/12$272
This American Airlines deal was found by Cheapflights users on 11/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/310:47 amONT - BOS
2 stops9h 57mAmerican Airlines
Fri 12/51:28 pmBOS - ONT
1 stop9h 11mAmerican Airlines
Deal found 11/13$276
This Delta deal was found by Cheapflights users on 11/12. 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 12/210:25 pmONT - BOS
1 stop8h 45mDelta
Sat 12/66:10 amBOS - ONT
1 stop9h 24mDelta
Deal found 11/12$297
This Alaska Airlines deal was found by Cheapflights users on 11/13. 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.
Thu 12/47:33 pmONT - BOS
1 stop8h 56mAlaska Airlines
Tue 12/99:00 amBOS - ONT
1 stop12h 33mAlaska Airlines
Deal found 11/13$303
This Southwest deal was found by Cheapflights users on 11/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/95:45 amONT - BOS
1 stop7h 20mSouthwest
Wed 12/175:30 amBOS - ONT
1 stop8h 05mSouthwest
Deal found 11/13$314
This American Airlines deal was found by Cheapflights users on 11/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1210:34 pmONT - BOS
1 stop8h 23mAmerican Airlines
Mon 12/1511:11 amBOS - ONT
2 stops10h 08mAmerican Airlines
Deal found 11/13$319
This Delta deal was found by Cheapflights users on 11/12. 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 12/101:29 pmONT - BOS
1 stop7h 12mDelta
Wed 12/176:10 amBOS - ONT
1 stop9h 24mDelta
Deal found 11/12$341
This Southwest deal was found by Cheapflights users on 11/12. 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 12/129:15 amONT - PWM
2 stops12h 05mSouthwest
Thu 12/183:00 pmPWM - ONT
2 stops12h 05mSouthwest
Deal found 11/12$386
This Delta deal was found by Cheapflights users on 11/13. 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.
Thu 11/2010:25 pmONT - PWM
2 stops10h 43mDelta
Mon 11/241:25 pmPWM - ONT
1 stop9h 17mDelta
Deal found 11/13$441
This United Airlines deal was found by Cheapflights users on 11/12. 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 11/275:05 amONT - PWM
1 stop7h 43mUnited Airlines
Fri 11/287:30 amPWM - ONT
1 stop8h 03mUnited Airlines
Deal found 11/12$483

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 November 14, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$231
(Trip.com)

One-way from

$82
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$480
Provider with most accurate pricing for Los Angeles-Portland flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Portland flights.
Search Deals
From Ontario to Maine
Search Deals
One-way flight from Ontario to Maine
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 14, 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

Wed 2/4

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Sun 2/8

5:20 pm-1:06 pm

1 stop22h 46m

$250

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 1/22

11:59 pm-11:31 am

1 stop8h 32m

Boston Logan Intl

Sun 1/25

6:00 am-12:38 pm

1 stop9h 38m

$251

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 12/3

1:34 pm-11:34 pm

1 stop7h 00m

Boston Logan Intl

Fri 12/5

1:30 pm-9:49 pm

1 stop11h 19m

$271

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 12/2

10:25 pm-11:15 am

1 stop9h 50m

Boston Logan Intl

Mon 12/8

5:13 pm-11:04 pm

1 stop8h 51m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 11/27

7:05 am-6:16 pm

1 stop8h 11m

Boston Logan Intl

Wed 12/10

6:46 pm-11:58 pm

1 stop8h 12m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 12/3

6:00 am-4:13 pm

1 stop7h 13m

Boston Logan Intl

Sat 12/6

6:10 am-12:34 pm

1 stop9h 24m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 12/4

10:25 pm-10:10 am

1 stop8h 45m

Boston Logan Intl

Wed 12/10

5:13 pm-11:04 pm

1 stop8h 51m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 12/11

1:29 pm-11:41 pm

1 stop7h 12m

Boston Logan Intl

Wed 12/17

6:10 am-12:34 pm

1 stop9h 24m

$341

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 1/22

6:30 am-4:50 pm

1 stop7h 20m

Boston Logan Intl

Sun 1/25

5:20 am-3:10 pm

2 stops12h 50m

$343

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 1/8

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Mon 1/12

7:00 am-11:56 pm

1 stop19h 56m

$352

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/13

Showing 1-10 of 50 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, April is the cheapest month in which you can book a flight from Ontario to Maine (average of $85). Flying from Ontario to Maine in December is currently the most expensive (average of $308). 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 November 14, 2025.

It’s typically best to fly out from Ontario to Maine in the evening. Doing so could potentially save you 64% on the flight price compared to flying at noon, which is usually more expensive.

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 November 14, 2025.
See what other customers who have flown with Southwest, Delta, and United 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.
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
7.9
Good
8,007 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
9,017 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
11,051 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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.

  • How long is the flight from Ontario to Maine?

    American Airlines, Alaska Airlines, and United Airlines can get you from Ontario to Maine in just under 7h. Your travel time can differ by up to 2h 01m. The distance between Ontario and Maine is about 2559 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $125 on Alaska Airlines. Other airlines that offer cheap prices include Delta from $154 and United Airlines from $181 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, April is the cheapest month in which you can book a flight from Ontario to Maine (average of $85). Flying from Ontario to Maine in December is currently the most expensive (average of $308). 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

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Top 4 airlines flying from Ontario to Maine

Discover the top 4 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 November 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$256Average$504FlexibilityNo cancel feeOn-time71%
DeltaCheapest$287Average$442FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$380Average$457FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$391Average$691FlexibilityNo cancel feeOn-time63%

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