How long is the flight from Ontario to Maine?

Delta, United Airlines, and American Airlines can get you from Ontario to Maine in just under 8h 36m. Your travel time can differ by up to 5h 03m. 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.

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.

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).

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.

What are the most popular airlines that fly from Ontario to Maine?

American Airlines, Delta and United Airlines are the most popular airlines when flying from Ontario to Maine.

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.

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.

$114+ Cheap Flights from Ontario to Maine

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1. Tell us where you want to go

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Cheap flight deals from Ontario to Maine

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$242 (Frontier)
One-way from	$114 (FlyFar)
Popular in	December
Cheapest in	January
Average price	$357

Provider with most accurate pricing for Los Angeles-Boston Logan Intl flight deals.

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Provider most trusted by Cheapflights users for Los Angeles-Boston Logan Intl flights.

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From Ontario to Maine

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One-way flight from Ontario to Maine

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High demand for flights, 2% potential price rise

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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).

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Average for round-trip flights in September 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 September 25, 2025.

Thu 11/612:05 pmONT - BOS

2 stops16h 47mFrontier

Mon 11/1012:20 pmBOS - ONT

2 stops14h 30mFrontier

Deal found 9/24

$242

Thu 10/2310:30 amONT - BOS

2 stops17h 57mFrontier

Sat 11/111:43 amBOS - ONT

2 stops15h 07mFrontier

Deal found 9/24

$247

Fri 11/144:05 pmONT - BOS

2 stops15h 43mFrontier

Mon 11/1712:20 pmBOS - ONT

2 stops14h 30mFrontier

Deal found 9/23

$252

Wed 10/296:00 amONT - BOS

1 stop15h 20mAlaska Airlines

Tue 11/47:00 amBOS - ONT

1 stop11h 17mAlaska Airlines

Deal found 9/24

$256

Tue 10/211:00 pmONT - BOS

1 stop7h 58mAmerican Airlines

Tue 10/285:30 amBOS - ONT

1 stop9h 23mAmerican Airlines

Deal found 9/22

$257

Thu 10/238:34 amONT - BOS

2 stops20h 59mFrontier

Thu 10/3010:04 amBOS - ONT

2 stops24h 25mFrontier

Deal found 9/23

$259

Mon 11/36:11 pmONT - BOS

1 stop10h 18mHawaiian Airlines

Tue 11/117:00 amBOS - ONT

1 stop11h 17mHawaiian Airlines

Deal found 9/23

$260

Tue 10/219:36 amONT - BOS

2 stops10h 20mUnited Airlines

Tue 11/412:25 pmBOS - ONT

1 stop9h 11mUnited Airlines

Deal found 9/25

$262

Fri 10/314:05 pmONT - BOS

2 stops15h 43mFrontier

Mon 11/38:40 amBOS - ONT

2 stops18h 10mFrontier

Deal found 9/24

$263

Mon 11/312:55 pmONT - BOS

1 stop7h 40mAmerican Airlines

Wed 11/56:05 amBOS - ONT

1 stop8h 58mAmerican Airlines

Deal found 9/24

$267

Thu 10/166:27 pmONT - BOS

1 stop8h 33mUnited Airlines

Tue 10/2112:10 pmBOS - ONT

2 stops11h 14mUnited Airlines

Deal found 9/23

$272

Sat 11/1511:59 amONT - BOS

1 stop9h 21mAlaska Airlines

Tue 11/187:00 amBOS - ONT

1 stop11h 17mAlaska Airlines

Deal found 9/25

$273

Best flights from Ontario to Maine
Discover carefully curated flight deals from Ontario to Maine that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 25, 2025.

Mon 10/2710:00 pmONT - BOS

1 stop8h 36mDelta

Wed 11/53:20 pmBOS - ONT

1 stop10h 02mDelta

Deal found 9/23

$297

Sat 10/255:05 amONT - PWM

2 stops13h 39mUnited Airlines

Fri 10/313:20 pmPWM - ONT

1 stop8h 24mUnited Airlines

Deal found 9/25

$302

Fri 1/1610:40 amONT - BOS

1 stop9h 15mSouthwest

Mon 1/195:20 amBOS - ONT

1 stop8h 20mSouthwest

Deal found 9/24

$305

Mon 10/276:11 pmONT - BOS

1 stop27h 09mAlaska Airlines

Tue 11/47:00 amBOS - ONT

1 stop11h 17mAlaska Airlines

Deal found 9/25

$309

Sat 10/1110:56 pmONT - PWM

1 stop11h 26mJetBlue

Thu 10/162:17 pmPWM - ONT

1 stop10h 12mJetBlue

Deal found 9/25

$472

Fri 3/68:04 pmONT - BGR

2 stops13h 02mAmerican Airlines

Tue 3/1012:57 pmBGR - ONT

2 stops11h 43mAmerican Airlines

Deal found 9/23

$534

Tue 12/21:20 pmONT - BOS

1 stop7h 20mDelta

Fri 12/56:47 pmBOS - ONT

1 stop8h 12mDelta

Deal found 9/25

$297

Fri 10/313:45 pmONT - BOS

1 stop11h 50mDelta

Mon 11/36:15 amBOS - ONT

1 stop8h 59mDelta

Deal found 9/23

$297

Tue 12/21:20 pmONT - BOS

1 stop7h 20mDelta

Wed 12/36:10 amBOS - ONT

1 stop9h 12mDelta

Deal found 9/25

$297

Fri 10/313:45 pmONT - BOS

1 stop11h 50mDelta

Thu 11/66:15 amBOS - ONT

1 stop9h 01mDelta

Deal found 9/23

$297

Fri 11/75:50 pmONT - BOS

1 stop9h 45mDelta

Sun 11/96:10 amBOS - ONT

1 stop9h 08mDelta

Deal found 9/25

$297

Wed 10/156:27 pmONT - PWM

2 stops11h 44mUnited Airlines

Wed 10/224:57 pmPWM - ONT

1 stop8h 33mUnited Airlines

Deal found 9/23

$450

Sat 12/61:20 pmONT - BOS

1 stop7h 20mDelta

Tue 12/96:47 pmBOS - ONT

1 stop8h 12mDelta

Deal found 9/25

$297

Wed 10/2911:36 amONT - BOS

1 stop10h 37mDelta

Thu 11/66:15 amBOS - ONT

1 stop9h 01mDelta

Deal found 9/23

$297

Mon 11/105:05 amONT - PWM

2 stops15h 12mUnited Airlines

Thu 11/134:54 pmPWM - ONT

1 stop8h 37mUnited Airlines

Deal found 9/24

$486

Thu 10/3011:48 amONT - BOS

1 stop9h 11mDelta

Thu 11/66:15 amBOS - ONT

1 stop9h 01mDelta

Deal found 9/23

$297

Fri 10/176:27 pmONT - PWM

2 stops11h 17mUnited Airlines

Tue 10/214:57 pmPWM - ONT

1 stop8h 33mUnited Airlines

Deal found 9/24

$526

Sat 12/61:20 pmONT - BOS

1 stop7h 20mDelta

Sun 12/76:47 pmBOS - ONT

1 stop8h 12mDelta

Deal found 9/25

$297

Wed 12/2411:45 amONT - PWM

1 stop7h 57mDelta

Fri 1/95:30 amPWM - ONT

1 stop9h 08mDelta

Deal found 9/25

$297

Mon 10/206:27 pmONT - BGR

2 stops17h 53mUnited Airlines

Sat 11/18:00 amBGR - ONT

3 stops17h 51mUnited Airlines

Deal found 9/25

$639

Fri 10/107:27 pmONT - BGR

2 stops13h 53mAmerican Airlines

Tue 10/143:48 pmBGR - ONT

1 stop8h 48mAmerican Airlines

Deal found 9/25

$877

Wed 12/2411:45 amONT - PWM

1 stop7h 57mDelta

Sat 1/105:30 amPWM - ONT

1 stop9h 08mDelta

Deal found 9/25

$368

Wed 12/3111:45 amONT - PWM

1 stop7h 57mDelta

Fri 1/95:30 amPWM - ONT

1 stop9h 08mDelta

Deal found 9/25

$417

Thu 10/167:02 amONT - BGR

1 stop29h 28mUnited Airlines

Mon 10/204:15 pmBGR - ONT

1 stop9h 15mUnited Airlines

Deal found 9/24

$986

Wed 12/2411:45 amONT - PWM

1 stop7h 57mDelta

Sun 1/115:30 amPWM - ONT

1 stop9h 08mDelta

Deal found 9/25

$575

Thu 1/111:45 amONT - PWM

1 stop7h 57mDelta

Fri 1/95:30 amPWM - ONT

1 stop9h 08mDelta

Deal found 9/25

$575

Fri 10/177:02 amONT - BGR

1 stop11h 38mUnited Airlines

Sun 10/199:35 amBGR - ONT

1 stop15h 55mUnited Airlines

Deal found 9/24

$1,814

Last-minute flights from Ontario to Maine
Discover last-minute flight deals from Ontario to Maine. Data last updated September 25, 2025 and is based on user searches.

Thu 10/166:27 pmONT - BOS

1 stop8h 33mUnited Airlines

Tue 10/2112:10 pmBOS - ONT

2 stops11h 14mUnited Airlines

Deal found 9/23

$272

Fri 10/177:27 pmONT - BOS

1 stop7h 48mAmerican Airlines

Mon 11/38:52 amBOS - ONT

1 stop10h 09mAmerican Airlines

Deal found 9/25

$285

Tue 10/211:00 pmONT - BOS

1 stop7h 58mAmerican Airlines

Tue 10/285:30 amBOS - ONT

1 stop9h 23mAmerican Airlines

Deal found 9/22

$257

Tue 10/219:36 amONT - BOS

2 stops10h 20mUnited Airlines

Tue 11/412:25 pmBOS - ONT

1 stop9h 11mUnited Airlines

Deal found 9/25

$262

Tue 10/2110:29 pmONT - BOS

1 stop9h 44mAmerican Airlines

Sat 10/255:30 amBOS - ONT

1 stop11h 13mAmerican Airlines

Deal found 9/24

$274

Thu 10/2310:30 amONT - BOS

2 stops17h 57mFrontier

Sat 11/111:43 amBOS - ONT

2 stops15h 07mFrontier

Deal found 9/24

$247

Thu 10/238:34 amONT - BOS

2 stops20h 59mFrontier

Thu 10/3010:04 amBOS - ONT

2 stops24h 25mFrontier

Deal found 9/23

$259

Sat 10/2510:57 amONT - BOS

1 stop9h 30mAmerican Airlines

Fri 10/313:54 pmBOS - ONT

1 stop8h 39mAmerican Airlines

Deal found 9/24

$282

Sat 10/255:05 amONT - PWM

2 stops13h 39mUnited Airlines

Fri 10/313:20 pmPWM - ONT

1 stop8h 24mUnited Airlines

Deal found 9/25

$302

Tue 10/2811:59 amONT - BOS

1 stop9h 21mAlaska Airlines

Tue 11/47:00 amBOS - ONT

1 stop11h 17mAlaska Airlines

Deal found 9/23

$281

Wed 10/296:00 amONT - BOS

1 stop15h 20mAlaska Airlines

Tue 11/47:00 amBOS - ONT

1 stop11h 17mAlaska Airlines

Deal found 9/24

$256

Fri 10/314:05 pmONT - BOS

2 stops15h 43mFrontier

Mon 11/38:40 amBOS - ONT

2 stops18h 10mFrontier

Deal found 9/24

$263

One-way flights from Ontario to Maine
Search for one-way flight options from Ontario to Maine. Find affordable one-way fares based on user searches. Data last updated September 25, 2025.

Tue 9/302:58 pmONT - BOS

2 stops17h 49mFrontier

Deal found 9/23

$114

Tue 10/217:43 pmONT - BOS

1 stop9h 10mAlaska Airlines

Deal found 9/23

$125

Wed 10/2212:00 pmONT - PWM

1 stop7h 30mSouthwest

Deal found 9/23

$126

Tue 11/411:59 amONT - BOS

1 stop9h 21mAlaska Airlines

Deal found 9/25

$128

Tue 11/186:00 amONT - BOS

1 stop8h 06mUnited Airlines

Deal found 9/25

$129

Wed 10/229:36 amONT - PWM

2 stops11h 23mUnited Airlines

Deal found 9/23

$131

Fri 11/146:53 amONT - BOS

2 stops24h 55mFrontier

Deal found 9/24

$131

Thu 10/3012:05 pmONT - BOS

2 stops16h 47mFrontier

Deal found 9/25

$132

Thu 11/1310:42 pmONT - BOS

2 stops33h 06mFrontier

Deal found 9/24

$133

Sat 10/258:00 amONT - BOS

2 stops20h 27mFrontier

Deal found 9/23

$135

Mon 12/152:26 pmONT - BOS

2 stops30h 35mFrontier

Deal found 9/24

$136

Fri 10/3110:09 amONT - BOS

1 stop8h 16mAmerican Airlines

Deal found 9/24

$137

Fly from

Fly to

Route

Depart

Return

Price

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 10/27

10:00 pm-9:36 am

1 stop8h 36m

Boston Logan Intl

Wed 11/5

3:20 pm-10:22 pm

1 stop10h 02m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 12/2

1:20 pm-11:40 pm

1 stop7h 20m

Boston Logan Intl

Fri 12/5

6:47 pm-11:59 pm

1 stop8h 12m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 10/31

3:45 pm-6:35 am

1 stop11h 50m

Boston Logan Intl

Mon 11/3

6:15 am-12:14 pm

1 stop8h 59m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 12/2

1:20 pm-11:40 pm

1 stop7h 20m

Boston Logan Intl

Wed 12/3

6:10 am-12:22 pm

1 stop9h 12m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 10/31

3:45 pm-6:35 am

1 stop11h 50m

Boston Logan Intl

Thu 11/6

6:15 am-12:16 pm

1 stop9h 01m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 11/7

5:50 pm-6:35 am

1 stop9h 45m

Boston Logan Intl

Sun 11/9

6:10 am-12:18 pm

1 stop9h 08m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 12/6

1:20 pm-11:40 pm

1 stop7h 20m

Boston Logan Intl

Tue 12/9

6:47 pm-11:59 pm

1 stop8h 12m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 10/29

11:36 am-1:13 am

1 stop10h 37m

Boston Logan Intl

Thu 11/6

6:15 am-12:16 pm

1 stop9h 01m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 10/30

11:48 am-11:59 pm

1 stop9h 11m

Boston Logan Intl

Thu 11/6

6:15 am-12:16 pm

1 stop9h 01m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 12/6

1:20 pm-11:40 pm

1 stop7h 20m

Boston Logan Intl

Sun 12/7

6:47 pm-11:59 pm

1 stop8h 12m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/25

Showing 1-10 of 54 results

...

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?

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

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

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

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Delta

8.0

Very good

7,973 reviews

Southwest

8.0

Very good

4,246 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

United Airlines

7.4

Good

8,926 reviews

Southwest

8.0

Very good

4,246 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,246 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

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?
Delta, United Airlines, and American Airlines can get you from Ontario to Maine in just under 8h 36m. Your travel time can differ by up to 5h 03m. 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 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Ontario to Maine

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Top 4 airlines flying from Ontario to Maine

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$256	Average$532	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$287	Average$491	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$356	Average$527	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$391	Average$691	FlexibilityNo cancel fee	On-time63%

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$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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Maine with Cheapflights

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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 September 25, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Maine

Cheapest flights from Ontario to MaineExplore 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 September 25, 2025.

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 September 25, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Maine that are best for you.

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.

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?

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 September 25, 2025.

Reviews of airlines servicing Maine

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.

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?

How long is the flight from Ontario to Maine?

What are the most popular routes from Ontario to Maine?

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

How can I find direct flights from Ontario to Maine?

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Maine

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from Ontario to Maine

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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 September 25, 2025.