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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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PWM
Aug 18 — Aug 251
Mon 8/18
Mon 8/25
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 August 13, 2025.

Round-trip from

$248
(American Airlines)

One-way from

$114
(FlyFar)

Popular in

December

Cheapest in

January

Average price

$440
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. 5% potential increase in price ($27 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 August 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 August 13, 2025.

This American Airlines deal was found by Cheapflights users on 8/10. 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 9/96:10 amONT - PWM
2 stops11h 01mAmerican Airlines
Tue 9/166:00 amPWM - ONT
2 stops10h 54mAmerican Airlines
Deal found 8/10$237
This American Airlines deal was found by Cheapflights users on 8/9. 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 8/3011:59 pmONT - PWM
1 stop10h 52mAmerican Airlines
Thu 9/112:43 pmPWM - ONT
1 stop9h 28mAmerican Airlines
Deal found 8/9$248
This United Airlines deal was found by Cheapflights users on 8/11. 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 9/235:10 amONT - PWM
2 stops11h 19mUnited Airlines
Thu 9/254:57 pmPWM - ONT
1 stop8h 33mUnited Airlines
Deal found 8/11$260
This Rumbo deal was found by Cheapflights users on 8/12. 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 Rumbo 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
Sat 9/132:45 pmBOS - ONT
1 stop9h 44mJetBlue
Deal found 8/12$263
This American Airlines deal was found by Cheapflights users on 8/11. 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 9/136:10 amONT - PWM
1 stop8h 35mAmerican Airlines
Tue 9/166:00 amPWM - ONT
2 stops13h 05mAmerican Airlines
Deal found 8/11$267
This American Airlines deal was found by Cheapflights users on 8/10. 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 9/310:53 amONT - BOS
1 stop9h 49mAmerican Airlines
Tue 9/96:15 amBOS - ONT
1 stop8h 41mAmerican Airlines
Deal found 8/10$277
This Southwest deal was found by Cheapflights users on 8/11. 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 9/1311:35 amONT - PWM
1 stop7h 25mSouthwest
Tue 9/165:50 amPWM - ONT
1 stop8h 45mSouthwest
Deal found 8/11$281
This American Airlines deal was found by Cheapflights users on 8/10. 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 9/77:16 pmONT - BOS
1 stop7h 45mAmerican Airlines
Wed 9/106:00 amBOS - ONT
1 stop8h 57mAmerican Airlines
Deal found 8/10$285
This JetBlue deal was found by Cheapflights users on 8/12. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/510:56 pmONT - PWM
1 stop11h 26mJetBlue
Fri 9/122:17 pmPWM - ONT
1 stop10h 12mJetBlue
Deal found 8/12$291
This JetBlue deal was found by Cheapflights users on 8/11. 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.
Sat 9/610:56 pmONT - BOS
1 stop7h 38mJetBlue
Fri 9/1212:20 pmBOS - ONT
1 stop12h 09mJetBlue
Deal found 8/11$291
This American Airlines deal was found by Cheapflights users on 8/10. 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 9/410:53 amONT - BOS
1 stop9h 49mAmerican Airlines
Sun 9/76:15 amBOS - ONT
1 stop8h 41mAmerican Airlines
Deal found 8/10$293
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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 10/217:47 pmONT - BOS
1 stop9h 06mAlaska Airlines
Thu 10/234:30 pmBOS - ONT
1 stop10h 33mAlaska Airlines
Deal found 8/11$294

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 August 13, 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

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 9/9

6:10 am-8:11 pm

2 stops11h 01m

Portland

Tue 9/16

6:00 am-1:54 pm

2 stops10h 54m

$237

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 8/30

11:59 pm-1:51 pm

1 stop10h 52m

Portland

Thu 9/11

2:43 pm-9:11 pm

1 stop9h 28m

$248

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 9/23

5:10 am-7:29 pm

2 stops11h 19m

Portland

Thu 9/25

4:57 pm-10:30 pm

1 stop8h 33m

$260

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 9/6

10:56 pm-9:34 am

1 stop7h 38m

Boston Logan Intl

Sat 9/13

2:45 pm-9:29 pm

1 stop9h 44m

$263

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 9/13

6:10 am-5:45 pm

1 stop8h 35m

Portland

Tue 9/16

6:00 am-4:05 pm

2 stops13h 05m

$267

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 10/21

7:47 pm-7:53 am

1 stop9h 06m

Boston Logan Intl

Tue 10/28

7:00 am-3:17 pm

1 stop11h 17m

$277

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 9/3

1:10 pm-11:54 pm

1 stop7h 44m

Boston Logan Intl

Tue 9/9

8:05 am-1:54 pm

1 stop8h 49m

$277

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 9/10

1:10 pm-11:54 pm

1 stop7h 44m

Boston Logan Intl

Wed 9/17

8:05 am-1:54 pm

1 stop8h 49m

$277

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 9/13

11:35 am-10:00 pm

1 stop7h 25m

Portland

Tue 9/16

5:50 am-11:35 am

1 stop8h 45m

$281

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 9/13

7:00 am-6:12 pm

1 stop8h 12m

Boston Logan Intl

Tue 9/16

3:15 pm-10:30 pm

1 stop10h 15m

$285

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 52 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 August 13, 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 August 13, 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
4,246 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

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
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

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
8.0
Very good
7,979 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

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
8,920 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

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
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

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.
JetBlue
7.2
Good
2,915 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

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.

  • 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 $119 and Delta from $149 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 August 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$266Average$518FlexibilityNo cancel feeOn-time71%
DeltaCheapest$287Average$491FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$331Average$459FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$356Average$447FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$397Average$721FlexibilityNo cancel feeOn-time63%

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