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Maine

$98+ 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PWM
Jan 29 — Feb 51
Thu 1/29
Thu 2/5
1 adult, Economy
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Cheap 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 December 30, 2025.

This Delta deal was found by Cheapflights users on 12/27. 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 12/3011:10 amONT - BOS
1 stop9h 01mDelta
Mon 1/56:10 amBOS - ONT
1 stop9h 06mDelta
Deal found 12/27$597
This Delta deal was found by Cheapflights users on 12/28. 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 12/3111:15 amONT - BOS
1 stop9h 39mDelta
Mon 1/56:10 amBOS - ONT
1 stop9h 06mDelta
Deal found 12/28$615
This Alaska Airlines deal was found by Cheapflights users on 12/27. 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.
Mon 12/294:36 pmONT - BOS
1 stop12h 12mAlaska Airlines
Wed 1/77:00 amBOS - ONT
1 stop11h 08mAlaska Airlines
Deal found 12/27$717
This Alaska Airlines deal was found by Cheapflights users on 12/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:19 pmONT - BOS
1 stop9h 29mAlaska Airlines
Mon 1/55:12 pmBOS - ONT
1 stop9h 47mAlaska Airlines
Deal found 12/28$721
This American Airlines deal was found by Cheapflights users on 12/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:40 pmONT - BOS
1 stop16h 04mAmerican Airlines
Sat 1/310:55 amBOS - ONT
1 stop13h 03mAmerican Airlines
Deal found 12/30$744
This Southwest deal was found by Cheapflights users on 12/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2812:20 pmONT - BOS
1 stop9h 30mSouthwest
Sun 1/47:05 pmBOS - ONT
1 stop8h 00mSouthwest
Deal found 12/28$757
This Delta deal was found by Cheapflights users on 12/28. 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.
Mon 12/296:00 amONT - BOS
1 stop8h 25mDelta
Fri 1/26:46 pmBOS - ONT
1 stop8h 08mDelta
Deal found 12/28$767
This American Airlines deal was found by Cheapflights users on 12/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:20 amONT - BOS
2 stops8h 59mAmerican Airlines
Tue 1/62:11 pmBOS - ONT
1 stop11h 37mAmerican Airlines
Deal found 12/28$772
This United Airlines deal was found by Cheapflights users on 12/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:39 pmONT - BOS
2 stops13h 29mUnited Airlines
Tue 1/65:20 amBOS - ONT
2 stops10h 27mUnited Airlines
Deal found 12/29$777
This United Airlines deal was found by Cheapflights users on 12/28. 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.
Sun 12/286:39 pmONT - BOS
2 stops15h 14mUnited Airlines
Sun 1/49:30 amBOS - ONT
2 stops14h 37mUnited Airlines
Deal found 12/28$782
This American Airlines deal was found by Cheapflights users on 12/29. 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.
Mon 12/2910:40 pmONT - BOS
1 stop17h 38mAmerican Airlines
Fri 1/212:14 pmBOS - ONT
1 stop11h 44mAmerican Airlines
Deal found 12/29$791
This United Airlines deal was found by Cheapflights users on 12/28. 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.
Sun 12/2811:59 pmONT - PWM
1 stop11h 15mUnited Airlines
Fri 1/24:10 pmPWM - ONT
1 stop9h 15mUnited Airlines
Deal found 12/28$1,568

Find flight deals from Ontario to Maine

Keep the following information in mind while searching for Ontario to Maine flight deals. Data was last updated December 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$237
(United Airlines)

One-way from

$98
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$598
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. 7% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 30, 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

Tue 2/10

7:00 am-3:08 pm

1 stop11h 08m

$258

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 2/25

4:02 pm-6:54 am

1 stop11h 52m

Boston Logan Intl

Wed 3/4

4:36 pm-11:52 pm

1 stop10h 16m

$258

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 2/7

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Thu 2/26

4:36 pm-11:52 pm

1 stop10h 16m

$258

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 1/31

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Tue 2/3

7:00 am-3:08 pm

1 stop11h 08m

$258

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 2/7

6:00 am-5:13 pm

1 stop8h 13m

Boston Logan Intl

Wed 2/25

6:00 am-12:43 pm

2 stops9h 43m

$264

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 2/7

1:00 pm-10:55 pm

1 stop6h 55m

Boston Logan Intl

Wed 2/25

5:30 am-4:05 pm

2 stops13h 35m

$264

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 1/15

6:00 am-6:01 pm

1 stop9h 01m

Boston Logan Intl

Tue 1/20

3:15 pm-8:58 pm

1 stop8h 43m

$267

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 3/11

4:02 pm-6:54 am

1 stop11h 52m

Boston Logan Intl

Mon 3/16

4:36 pm-11:52 pm

1 stop10h 16m

$280

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 4/1

10:25 pm-10:04 am

1 stop8h 39m

Boston Logan Intl

Sat 4/4

5:15 pm-10:48 pm

1 stop8h 33m

$297

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Mon 2/2

10:30 pm-12:03 pm

2 stops10h 33m

Portland

Mon 2/9

12:10 pm-9:05 pm

2 stops11h 55m

$307

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/30

Showing 1-10 of 44 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 $388). 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.

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 December 30, 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
4,251 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,251 reviews
Southwest
8.0
Very good
4,251 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,013 reviews
Southwest
8.0
Very good
4,251 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,124 reviews
Southwest
8.0
Very good
4,251 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,075 reviews
Southwest
8.0
Very good
4,251 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

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?

    Alaska Airlines, Delta, and American Airlines can get you from Ontario to Maine in just under 9h 01m. Your travel time can differ by up to 5h 49m. 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 American Airlines. Other airlines that offer cheap prices include Southwest from $148 and Delta from $148 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 $388). 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 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 December 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$148Average$338FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$266Average$491FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$380Average$457FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$383Average$618FlexibilityNo cancel feeOn-time63%

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