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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 6/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PWM
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$257
(United Airlines)

One-way from

$114
(FlyFar)

Popular in

December

Cheapest in

January

Average price

$466
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. 6% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/26:39 pmONT - BOS
1 stop10h 39mUnited Airlines
Fri 7/43:08 pmBOS - ONT
1 stop8h 46mUnited Airlines
Deal found 6/10$257
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Sun 8/316:10 amONT - BOS
1 stop10h 39mAmerican Airlines
Sat 9/66:00 amBOS - ONT
1 stop8h 56mAmerican Airlines
Deal found 6/11$285
This JetBlue deal was found by Cheapflights users on 6/10. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1411:45 pmONT - BOS
1 stop9h 06mJetBlue
Sun 8/171:45 pmBOS - ONT
1 stop11h 45mJetBlue
Deal found 6/10$291
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/311:39 amONT - BOS
1 stop9h 44mAlaska Airlines
Tue 9/94:00 pmBOS - ONT
1 stop21h 44mAlaska Airlines
Deal found 6/10$296
This Delta deal was found by Cheapflights users on 6/12. 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 8/1311:45 amONT - BOS
1 stop8h 29mDelta
Thu 8/216:10 amBOS - ONT
1 stop9h 04mDelta
Deal found 6/12$297
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/3011:45 amONT - PWM
1 stop9h 18mDelta
Wed 9/101:34 pmPWM - ONT
1 stop8h 37mDelta
Deal found 6/10$297
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/219:10 pmONT - BOS
2 stops9h 10mSouthwest
Sat 10/256:30 amBOS - ONT
1 stop7h 50mSouthwest
Deal found 6/10$310
This Frontier deal was found by Cheapflights users on 6/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/108:09 pmONT - BOS
1 stop11h 49mFrontier
Mon 8/1811:55 amBOS - ONT
1 stop10h 19mFrontier
Deal found 6/12$316
This JetBlue deal was found by Cheapflights users on 6/11. 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.
Tue 9/211:45 pmONT - PWM
1 stop10h 37mJetBlue
Thu 9/112:17 pmPWM - ONT
1 stop10h 12mJetBlue
Deal found 6/11$320
This Southwest deal was found by Cheapflights users on 6/11. 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.
Mon 8/49:20 pmONT - PWM
1 stop9h 30mSouthwest
Fri 8/85:50 amPWM - ONT
1 stop8h 45mSouthwest
Deal found 6/11$345
This United Airlines deal was found by Cheapflights users on 6/11. 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 10/215:05 amONT - PWM
1 stop7h 43mUnited Airlines
Tue 10/284:48 pmPWM - ONT
1 stop8h 43mUnited Airlines
Deal found 6/11$351
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Wed 7/166:10 amONT - PWM
2 stops11h 14mAmerican Airlines
Tue 7/225:55 amPWM - ONT
2 stops13h 19mAmerican Airlines
Deal found 6/11$378

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 June 12, 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 7/2

6:39 pm-8:18 am

1 stop10h 39m

Boston Logan Intl

Fri 7/4

3:08 pm-8:54 pm

1 stop8h 46m

$257

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 8/31

6:10 am-7:49 pm

1 stop10h 39m

Boston Logan Intl

Sat 9/6

6:00 am-11:56 am

1 stop8h 56m

$285

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 8/14

11:45 pm-11:51 am

1 stop9h 06m

Boston Logan Intl

Sun 8/17

1:45 pm-10:30 pm

1 stop11h 45m

$291

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 9/3

11:39 am-12:23 am

1 stop9h 44m

Boston Logan Intl

Tue 9/9

4:00 pm-10:44 am

1 stop21h 44m

$296

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 8/30

11:45 am-12:03 am

1 stop9h 18m

Portland

Wed 9/10

1:34 pm-7:11 pm

1 stop8h 37m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 8/4

10:05 pm-9:34 am

1 stop8h 29m

Boston Logan Intl

Wed 8/13

5:35 am-10:35 am

1 stop8h 00m

$299

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 10/21

5:30 am-5:30 pm

1 stop9h 00m

Boston Logan Intl

Sat 10/25

6:30 am-11:20 am

1 stop7h 50m

$305

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 9/2

11:45 pm-1:22 pm

1 stop10h 37m

Portland

Thu 9/11

2:17 pm-9:29 pm

1 stop10h 12m

$320

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 8/3

8:09 pm-10:57 am

1 stop11h 48m

Boston Logan Intl

Fri 8/8

11:55 am-7:14 pm

1 stop10h 19m

$321

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Mon 8/4

9:20 pm-9:50 am

1 stop9h 30m

Portland

Fri 8/8

5:50 am-11:35 am

1 stop8h 45m

$345

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 36 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 June 12, 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.

Rainfall in Maine by month

Plan your trip to Maine by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Maine ranges from 2.9 - 4.5 inches per month. November is typically the wettest month, when rainfall can reach 4.5 in. August is typically the driest time to visit Maine when rainfall is around 2.9 in.

Temperature in Maine by month

Plan your trip to Maine by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Maine, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 June 12, 2025.
To help decide which airline to fly from Ontario to Maine, see what other customers have to say about Alaska Airlines, Southwest and Delta. 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

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 $126 and United Airlines from $144 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$259Average$392FlexibilityNo cancel feeOn-time62%
DeltaCheapest$287Average$491FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$300Average$493FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$384Average$658FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$523Average$746FlexibilityNo cancel feeOn-time63%

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