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Ontario

$106+ Cheap flights from Maine to Ontario (ONT)

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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — ONT
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Maine to Ontario

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

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$292
(American Airlines)

One-way from

$106
(Kiwi.com)

Popular in

February

Cheapest in

January

Average price

$401
Provider with most accurate pricing for Portland-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Portland-Los Angeles flights.
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From Maine to Ontario
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One-way flight from Maine to Ontario
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Highest demand for flights based on searches. 1% potential increase in price ($4 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Maine to Ontario

Cheapest flights from Maine to Ontario
Explore the most affordable flight options available from Maine to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This American Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 11/208:52 amBOS - ONT
1 stop10h 09mAmerican Airlines
Thu 11/276:11 amONT - BOS
1 stop7h 07mAmerican Airlines
Deal found 10/29$292
This Delta deal was found by Cheapflights users on 10/27. 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.
Wed 11/196:10 amBOS - ONT
1 stop9h 08mDelta
Thu 11/276:00 amONT - BOS
1 stop7h 10mDelta
Deal found 10/27$297
This Delta deal was found by Cheapflights users on 10/28. 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.
Thu 11/205:40 amBOS - ONT
1 stop8h 26mDelta
Wed 12/31:29 pmONT - BOS
1 stop7h 12mDelta
Deal found 10/28$324
This American Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 11/206:05 amBOS - ONT
1 stop8h 58mAmerican Airlines
Mon 11/2412:55 pmONT - BOS
1 stop7h 40mAmerican Airlines
Deal found 10/29$326
This American Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 12/119:19 amBOS - ONT
1 stop9h 43mAmerican Airlines
Thu 12/259:53 amONT - BOS
1 stop7h 17mAmerican Airlines
Deal found 10/29$330
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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.
Fri 12/56:59 pmBOS - ONT
1 stop19h 20mAlaska Airlines
Wed 12/246:05 pmONT - BOS
1 stop9h 05mAlaska Airlines
Deal found 10/28$333
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Fri 12/57:30 amBOS - ONT
1 stop9h 25mAmerican Airlines
Wed 12/249:53 amONT - BOS
1 stop7h 17mAmerican Airlines
Deal found 10/28$334
This United Airlines deal was found by Cheapflights users on 10/28. 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 11/181:32 pmBOS - ONT
1 stop11h 17mUnited Airlines
Sun 11/231:40 pmONT - BOS
1 stop8h 08mUnited Airlines
Deal found 10/28$336
This Delta deal was found by Cheapflights users on 10/28. 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.
Sun 11/236:10 amBOS - ONT
1 stop9h 08mDelta
Thu 11/276:00 amONT - BOS
1 stop7h 10mDelta
Deal found 10/28$338
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Tue 12/166:00 amPWM - ONT
3 stops19h 49mUnited Airlines
Wed 1/75:05 amONT - PWM
2 stops10h 45mUnited Airlines
Deal found 10/29$420
This Delta deal was found by Cheapflights users on 10/30. 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 11/104:53 pmPWM - ONT
2 stops9h 59mDelta
Fri 11/1410:25 pmONT - PWM
2 stops10h 43mDelta
Deal found 10/30$532
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 11/133:20 pmPWM - ONT
1 stop8h 24mUnited Airlines
Mon 11/175:05 amONT - PWM
1 stop7h 43mUnited Airlines
Deal found 10/29$569

Cheapflights Fare Finder

 
Customize your flight search to find flights from Maine to Ontario 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 October 30, 2025.
Use the filters below to find and compare flights from Maine to Ontario that are best for you.

Fly from

Maine

Fly to

Ontario

Route

Depart

Return

Price

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 12/11

6:10 am-12:34 pm

1 stop9h 24m

Ontario

Thu 12/25

1:15 pm-12:24 am

1 stop8h 09m

$334

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 11/19

6:10 am-12:18 pm

1 stop9h 08m

Ontario

Wed 11/26

10:25 pm-10:37 am

1 stop9h 12m

$338

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 1/29

5:30 am-11:54 am

1 stop9h 24m

Ontario

Mon 2/16

10:30 pm-11:00 am

2 stops9h 30m

$343

PortlandOntario

PWM - ONT

PWMONT

Portland

Sat 1/31

5:30 am-11:54 am

1 stop9h 24m

Ontario

Mon 2/16

10:30 pm-11:00 am

2 stops9h 30m

$343

PortlandOntario

PWM - ONT

PWMONT

Portland

Tue 1/27

5:30 am-11:54 am

1 stop9h 24m

Ontario

Wed 2/18

10:30 pm-11:00 am

2 stops9h 30m

$373

PortlandOntario

PWM - ONT

PWMONT

Portland

Sat 1/31

5:30 am-11:54 am

1 stop9h 24m

Ontario

Wed 2/18

10:30 pm-11:00 am

2 stops9h 30m

$373

PortlandOntario

PWM - ONT

PWMONT

Portland

Wed 1/28

5:30 am-11:54 am

1 stop9h 24m

Ontario

Wed 2/18

10:30 pm-11:00 am

2 stops9h 30m

$373

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 1/29

5:30 am-11:54 am

1 stop9h 24m

Ontario

Wed 2/18

10:30 pm-11:00 am

2 stops9h 30m

$373

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 12/17

6:10 am-12:34 pm

1 stop9h 24m

Ontario

Tue 1/6

1:04 pm-1:04 am

1 stop9h 00m

$385

PortlandOntario

PWM - ONT

PWMONT

Portland

Fri 1/30

5:30 am-11:54 am

1 stop9h 24m

Ontario

Mon 2/16

10:30 pm-11:00 am

2 stops9h 30m

$414

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 45 results
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Best time to book a flight from Maine to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Maine 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 Maine to Ontario

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

Currently, September is the cheapest month in which you can book a flight from Maine to Ontario (average of $158). Flying from Maine to Ontario in July is currently the most expensive (average of $296). 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.

Related info for your journey

Find useful and relevant information for your journey from Maine to Ontario. 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 into for flights to Ontario from Maine?

    If you book a flight to Ontario from Maine, you will be flying to 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 Maine to Ontario?

    Departing from Maine to Ontario will take you 9h 10m. The distance from Maine to Ontario is about 2559 mi. This flight may include one or multiple stops.

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

    $154 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Alaska Airlines and United Airlines, with prices starting from $175 and $181, respectively.

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

    The most popular route from Maine to Ontario is Boston Logan Intl - Ontario. You may also consider Portland - Ontario or Bangor - Ontario.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Maine to Ontario 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 Maine to Ontario?

    Currently, September is the cheapest month in which you can book a flight from Maine to Ontario (average of $158). Flying from Maine to Ontario in July is currently the most expensive (average of $296). 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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Top 2 airlines flying from Maine to Ontario

Discover the top 2 airlines that operate flights from Maine to Ontario. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$279Average$566FlexibilityNo cancel feeOn-time71%
DeltaCheapest$302Average$442FlexibilityNo cancel feeOn-timeN/A

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