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Maine

$106+ 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 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PWM
mar. 23 — mar. 301
lun. 3/23
lun. 3/30
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 febrero 21, 2026.

This United Airlines deal was found by Cheapflights users on 2/17. 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.
mar. 3/106:37 pm
ONT
-
BOS
1 stop10h 36m
United Airlines
mar. 3/175:45 am
BOS
-
ONT
1 stop9h 33m
United Airlines
Deal found 2/17$254
This CheapOair deal was found by Cheapflights users on 2/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/1112:02 pm
ONT
-
BOS
1 stop8h 57m
Alaska Airlines
lun. 3/166:24 pm
BOS
-
ONT
1 stop19h 44m
Alaska Airlines
Deal found 2/18$259
This American Airlines deal was found by Cheapflights users on 2/18. 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.
jue. 3/127:59 pm
ONT
-
BOS
1 stop6h 35m
American Airlines
mié. 3/186:15 am
BOS
-
ONT
1 stop8h 16m
American Airlines
Deal found 2/18$260
This JetBlue deal was found by Cheapflights users on 2/18. 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.
mar. 5/2611:25 pm
ONT
-
BOS
1 stop7h 55m
JetBlue
lun. 6/11:00 pm
BOS
-
ONT
1 stop12h 09m
JetBlue
Deal found 2/18$269
This JetBlue deal was found by Cheapflights users on 2/18. 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.
mié. 8/511:59 pm
ONT
-
PWM
1 stop10h 30m
JetBlue
jue. 8/272:25 pm
PWM
-
ONT
1 stop11h 15m
JetBlue
Deal found 2/18$269
This American Airlines deal was found by Cheapflights users on 2/20. 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.
vie. 5/17:35 pm
ONT
-
BOS
2 stops10h 52m
American Airlines
mar. 5/56:00 am
BOS
-
ONT
1 stop10h 18m
American Airlines
Deal found 2/20$270
This United Airlines deal was found by Cheapflights users on 2/21. 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.
jue. 3/126:37 pm
ONT
-
BOS
1 stop10h 36m
United Airlines
mar. 3/175:45 am
BOS
-
ONT
1 stop9h 33m
United Airlines
Deal found 2/21$273
This Alaska Airlines deal was found by Cheapflights users on 2/17. 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.
mar. 3/104:02 pm
ONT
-
BOS
1 stop11h 52m
Alaska Airlines
mié. 3/114:36 pm
BOS
-
ONT
1 stop10h 16m
Alaska Airlines
Deal found 2/17$276
This American Airlines deal was found by Cheapflights users on 2/20. 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.
mar. 3/1011:58 pm
ONT
-
BOS
2 stops9h 18m
American Airlines
mié. 3/184:04 pm
BOS
-
ONT
1 stop10h 55m
American Airlines
Deal found 2/20$283
This American Airlines deal was found by Cheapflights users on 2/20. 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.
mar. 3/1011:58 pm
ONT
-
BOS
2 stops9h 18m
American Airlines
mar. 3/172:40 pm
BOS
-
ONT
2 stops10h 27m
American Airlines
Deal found 2/20$288
This United Airlines deal was found by Cheapflights users on 2/19. 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.
mié. 4/16:49 pm
ONT
-
BOS
1 stop8h 32m
United Airlines
dom. 5/36:00 am
BOS
-
ONT
1 stop9h 22m
United Airlines
Deal found 2/19$289
This Delta deal was found by Cheapflights users on 2/18. 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.
mar. 4/2810:15 pm
ONT
-
PWM
2 stops9h 47m
Delta
mié. 5/65:21 am
PWM
-
ONT
1 stop9h 15m
Delta
Deal found 2/18$324

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 febrero 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$254
(United Airlines)

One-way from

$106
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$387
Provider with most accurate pricing for Los Angeles-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Boston Logan Intl 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. 10% potential increase in price ($44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 febrero 21, 2026.
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

mié. 8/5

11:59 pm-1:29 pm

1 stop10h 30m

Portland

jue. 8/27

2:25 pm-10:40 pm

1 stop11h 15m

$269

OntarioBoston

ONT - BOS

ONTBOS

Ontario

mié. 3/11

5:53 pm-6:49 am

1 stop9h 56m

Boston Logan Intl

mié. 3/18

7:10 am-4:28 pm

2 stops12h 18m

$288

OntarioBoston

ONT - BOS

ONTBOS

Ontario

jue. 3/5

6:37 pm-7:58 am

1 stop10h 21m

Boston Logan Intl

dom. 3/8

5:45 am-11:18 am

1 stop9h 33m

$292

OntarioBoston

ONT - BOS

ONTBOS

Ontario

lun. 6/8

7:41 pm-7:41 am

1 stop9h 00m

Boston Logan Intl

mié. 6/10

7:10 am-4:16 pm

1 stop12h 06m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

vie. 3/6

6:37 pm-6:08 am

1 stop8h 31m

Boston Logan Intl

lun. 3/9

2:15 pm-10:18 pm

2 stops11h 03m

$302

OntarioBoston

ONT - BOS

ONTBOS

Ontario

lun. 4/6

5:53 pm-11:59 pm

1 stop27h 06m

Boston Logan Intl

sáb. 4/25

6:45 pm-1:39 pm

1 stop21h 54m

$303

OntarioBoston

ONT - BOS

ONTBOS

Ontario

mié. 4/1

6:49 pm-6:21 am

1 stop8h 32m

Boston Logan Intl

mié. 5/6

9:20 am-5:52 pm

2 stops11h 32m

$313

OntarioBoston

ONT - BOS

ONTBOS

Ontario

vie. 4/3

5:49 pm-5:53 am

1 stop9h 04m

Boston Logan Intl

dom. 4/26

7:00 am-2:32 pm

1 stop10h 32m

$323

OntarioPortland

ONT - PWM

ONTPWM

Ontario

mar. 4/28

10:15 pm-11:02 am

2 stops9h 47m

Portland

mié. 5/6

5:21 am-11:36 am

1 stop9h 15m

$324

OntarioBoston

ONT - BOS

ONTBOS

Ontario

vie. 4/3

1:20 pm-11:59 pm

1 stop7h 39m

Boston Logan Intl

mié. 4/8

7:10 am-5:13 pm

1 stop13h 03m

$327

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 60 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 $331). 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 febrero 21, 2026.
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
4,298 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

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
4,298 reviews
Southwest
8.0
Very good
4,298 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

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
8,228 reviews
Southwest
8.0
Very good
4,298 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

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
9,335 reviews
Southwest
8.0
Very good
4,298 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

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
11,334 reviews
Southwest
8.0
Very good
4,298 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

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?

    JetBlue, Delta, and United Airlines can get you from Ontario to Maine in just under 9h 56m. Your travel time can differ by up to 34m. 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 $331). 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 febrero 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$148Average$296FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$266Average$491FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$380Average$447FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$383Average$614FlexibilityNo cancel feeOn-time63%

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