What is the cheapest airline that flies from Ontario to Maine?

Southwest, Alaska Airlines, and Delta are the most popular carriers operating from Ontario to Maine

What airlines fly to Maine?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Maine from Ontario according to our data. American Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Maine. Keep in mind that there are 6 different airlines that fly to Maine on a routine basis, so you have a few additional options to choose from.

How many flights depart from Ontario to Maine on average per week?

5 flights are operational weekly from Ontario to Maine as of March 2026. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.

When did momondo last update prices for flights from Ontario Airport to Maine?

Prices for flights from Ontario Airport to Maine were last updated today.

How many operators does momondo search for flights from Ontario Airport to Maine?

As of March 2026, there are 6 operators available to choose from for flights from Ontario Airport to Maine.

How old do you have to be to fly from Ontario Airport to Maine?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Maine.

What documentation or ID do you need to fly to Maine?

The travel and health documents required for your trip to Maine can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Maine. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$103 Cheap Flights from Ontario to Maine in 2026

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Find the cheapest flights from Ontario to Maine

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:55 pm - 9:45 am

ONT

BOS

8h 50m

1 stop

7:20 am - 3:15 pm

BOS

ONT

10h 55m

1 stop

$243Southwest

Mon, Apr 20 - Mon, Apr 27

12:19 pm - 12:24 am

ONT

BOS

9h 05m

1 stop

6:13 am - 11:34 am

BOS

ONT

8h 21m

1 stop

$244American Airlines

Fri, May 1 - Tue, May 5

11:35 am - 11:55 pm

ONT

BOS

9h 20m

2 stops

7:20 am - 1:15 pm

BOS

ONT

8h 55m

1 stop

$250Southwest

Fri, May 8 - Tue, May 12

11:35 am - 11:55 pm

ONT

BOS

9h 20m

2 stops

2:25 pm - 9:50 pm

BOS

ONT

10h 25m

2 stops

$255Southwest

Fri, May 8 - Tue, May 12

7:35 pm - 9:27 am

ONT

BOS

10h 52m

2 stops

4:21 pm - 10:36 pm

BOS

ONT

9h 15m

1 stop

$269American Airlines

Fri, May 1 - Tue, May 5

10:15 pm - 9:34 am

ONT

BOS

8h 19m

1 stop

5:35 am - 11:36 am

BOS

ONT

9h 01m

1 stop

$297Delta

Tue, Apr 21 - Tue, Apr 28

5:50 pm - 7:35 am

ONT

BOS

10h 45m

1 stop

5:35 am - 10:57 am

BOS

ONT

8h 22m

1 stop

$303Delta

Sun, May 10 - Sat, May 16

6:59 pm - 8:23 am

ONT

BOS

10h 24m

1 stop

4:35 pm - 10:35 pm

BOS

ONT

9h 00m

1 stop

$304United Airlines

Mon, May 4 - Wed, May 13

10:39 am - 11:59 pm

ONT

BOS

10h 20m

1 stop

7:00 am - 2:30 pm

BOS

ONT

10h 30m

1 stop

$309Alaska Airlines

Tue, May 5 - Wed, May 6

6:59 pm - 10:18 am

ONT

PWM

12h 19m

2 stops

3:23 pm - 8:36 pm

PWM

ONT

8h 13m

1 stop

$404United Airlines

Tue, May 5 - Wed, May 6

Southwest flights from Ontario to Maine

Our best Southwest deals on Ontario to Maine flight tickets

Southwest

Apr 20

ONT9:55 pmOntario

8h 50m

1 stop

BOS9:45 amBoston Logan Intl

Apr 27

BOS7:20 amBoston Logan Intl

10h 55m

1 stop

ONT3:15 pmOntario

$243

Southwest

May 8

ONT11:35 amOntario

9h 20m

2 stops

BOS11:55 pmBoston Logan Intl

May 12

BOS7:20 amBoston Logan Intl

8h 55m

1 stop

ONT1:15 pmOntario

$250

Southwest

May 8

ONT11:35 amOntario

9h 20m

2 stops

BOS11:55 pmBoston Logan Intl

May 12

BOS2:25 pmBoston Logan Intl

10h 25m

2 stops

ONT9:50 pmOntario

$255

American Airlines flights from Ontario to Maine

Our best American Airlines deals on Ontario to Maine flight tickets

American Airlines

May 1

ONT12:19 pmOntario

9h 05m

1 stop

BOS12:24 amBoston Logan Intl

May 5

BOS6:13 amBoston Logan Intl

8h 21m

1 stop

ONT11:34 amOntario

$244

American Airlines

May 1

ONT7:35 pmOntario

10h 52m

2 stops

BOS9:27 amBoston Logan Intl

May 5

BOS4:21 pmBoston Logan Intl

9h 15m

1 stop

ONT10:36 pmOntario

$269

American Airlines

May 1

ONT7:35 pmOntario

10h 52m

2 stops

BOS9:27 amBoston Logan Intl

May 5

BOS4:21 pmBoston Logan Intl

9h 15m

1 stop

ONT10:36 pmOntario

$334

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 4/20

9:55 pm-9:45 am

1 stop8h 50m

Boston Logan Intl

Mon 4/27

7:20 am-3:15 pm

1 stop10h 55m

$243

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 5/1

12:19 pm-12:24 am

1 stop9h 05m

Boston Logan Intl

Tue 5/5

6:13 am-11:34 am

1 stop8h 21m

$244

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 5/8

11:35 am-11:55 pm

2 stops9h 20m

Boston Logan Intl

Tue 5/12

7:20 am-1:15 pm

1 stop8h 55m

$250

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 5/8

11:35 am-11:55 pm

2 stops9h 20m

Boston Logan Intl

Tue 5/12

2:25 pm-9:50 pm

2 stops10h 25m

$255

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 5/1

7:35 pm-9:27 am

2 stops10h 52m

Boston Logan Intl

Tue 5/5

4:21 pm-10:36 pm

1 stop9h 15m

$269

Quickest round-trip

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 4/21

10:15 pm-9:34 am

1 stop8h 19m

Boston Logan Intl

Tue 4/28

5:35 am-11:36 am

1 stop9h 01m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 5/10

5:50 pm-7:35 am

1 stop10h 45m

Boston Logan Intl

Sat 5/16

5:35 am-10:57 am

1 stop8h 22m

$303

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 5/4

6:59 pm-8:23 am

1 stop10h 24m

Boston Logan Intl

Wed 5/13

4:35 pm-10:35 pm

1 stop9h 00m

$304

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 5/5

10:39 am-11:59 pm

1 stop10h 20m

Boston Logan Intl

Wed 5/6

7:00 am-2:30 pm

1 stop10h 30m

$309

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 5/5

6:59 pm-10:18 am

2 stops12h 19m

Portland

Wed 5/6

3:23 pm-8:36 pm

1 stop8h 13m

$404

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Maine

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

Can stopping save me money on Ontario to Maine flights?

You could potentially save up to 47% on your flight if you consider stops on a Ontario to Maine flight.

Cheap Ontario to Maine flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Maine

Fastest flight time	7h 03m
Direct flights	None

The fastest flight from Ontario to Maine takes 7h 03m

There are no direct flights from Ontario to Maine. There are no popular flight routes from Ontario to Maine.

Search flight deals

When did momondo last update prices for flights from Ontario Airport to Maine?
Prices for flights from Ontario Airport to Maine were last updated today.
How many operators does momondo search for flights from Ontario Airport to Maine?
As of March 2026, there are 6 operators available to choose from for flights from Ontario Airport to Maine.
How old do you have to be to fly from Ontario Airport to Maine?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Maine.
What documentation or ID do you need to fly to Maine?
The travel and health documents required for your trip to Maine can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Maine. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Ontario to Maine

Compare and see reviews for airlines that fly from Ontario to Maine with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $148	Free Cancellation	Rating 7.9 8,320 reviews	Search Delta flights
American Airlines	PriceFrom $266	Free Cancellation	Rating 7.1 11,492 reviews	Search American Airlines flights
United Airlines	PriceFrom $380	Free Cancellation	Rating 7.4 9,469 reviews	Search United Airlines flights
Southwest	PriceFrom $383	Free Cancellation	Rating 8.0 4,329 reviews	Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Maine?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Maine for you.

Can I find flights from Ontario to Maine with flexible booking policies on momondo?

All flight searches from Ontario to Maine on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Maine?

momondo provides multiple filters to help you find the best flight to Maine from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to Maine right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Maine flights. All you need is a valid email address and we will do the rest; it is that quick and easy.