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

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

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

6 flights are operational weekly from Ontario to Maine as of May 2026. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.

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.

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 May 2026, there are 5 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.

$133 Cheap Flights from Ontario to Maine in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

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.

7:13 pm - 8:01 am

ONT

BOS

9h 48m

1 stop

12:30 pm - 6:19 pm

BOS

ONT

8h 49m

1 stop

$292United Airlines

Tue, Sep 1 - Wed, Sep 9

4:57 pm - 6:20 am

ONT

BOS

10h 23m

1 stop

6:45 pm - 11:34 pm

BOS

ONT

7h 49m

1 stop

$297Delta

Thu, May 28 - Wed, Jun 3

10:00 pm - 9:22 am

ONT

BOS

8h 22m

1 stop

6:20 am - 12:05 pm

BOS

ONT

8h 45m

1 stop

$298American Airlines

Sat, May 23 - Fri, May 29

1:10 pm - 11:14 pm

ONT

BOS

7h 04m

1 stop

3:06 pm - 9:57 pm

BOS

ONT

9h 51m

2 stops

$302American Airlines

Fri, May 29 - Tue, Jun 2

9:50 am - 11:35 pm

ONT

BOS

10h 45m

2 stops

7:55 am - 3:05 pm

BOS

ONT

10h 10m

2 stops

$307Southwest

Sat, Jun 6 - Fri, Jun 12

5:05 pm - 6:09 am

ONT

BOS

10h 04m

1 stop

6:25 pm - 11:48 pm

BOS

ONT

8h 23m

1 stop

$318Delta

Fri, Oct 2 - Sat, Oct 31

12:40 pm - 12:04 am

ONT

BOS

8h 24m

1 stop

6:00 am - 11:51 am

BOS

ONT

8h 51m

1 stop

$323American Airlines

Fri, May 29 - Sat, Jun 6

1:20 pm - 12:45 am

ONT

BOS

8h 25m

1 stop

5:25 am - 12:05 pm

BOS

ONT

9h 40m

1 stop

$324Southwest

Wed, Jul 22 - Tue, Jul 28

11:24 pm - 12:17 pm

ONT

PWM

9h 53m

1 stop

2:40 pm - 10:35 pm

PWM

ONT

10h 55m

1 stop

$366JetBlue

Sat, Aug 1 - Wed, Aug 12

11:50 pm - 12:21 pm

ONT

PWM

9h 31m

1 stop

2:40 pm - 10:35 pm

PWM

ONT

10h 55m

1 stop

$415JetBlue

Mon, Jul 6 - Wed, Jul 15

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United Airlines flights from Ontario to Maine

Our best United Airlines deals on Ontario to Maine flight tickets

United Airlines

Sep 12

ONT7:13 pmOntario

9h 48m

1 stop

BOS8:01 amBoston Logan Intl

Sep 20

BOS6:00 amBoston Logan Intl

9h 12m

1 stop

ONT12:12 pmOntario

$292

United Airlines

May 16

ONT1:40 pmOntario

7h 19m

1 stop

BOS11:59 pmBoston Logan Intl

May 24

BOS1:37 pmBoston Logan Intl

11h 18m

1 stop

ONT9:55 pmOntario

$297

United Airlines

Aug 18

ONT7:00 amOntario

7h 36m

1 stop

BOS5:36 pmBoston Logan Intl

Aug 24

BOS3:47 pmBoston Logan Intl

9h 12m

1 stop

ONT9:59 pmOntario

$330

American Airlines flights from Ontario to Maine

Our best American Airlines deals on Ontario to Maine flight tickets

American Airlines

May 23

ONT10:00 pmOntario

8h 22m

1 stop

BOS9:22 amBoston Logan Intl

May 29

BOS6:20 amBoston Logan Intl

8h 45m

1 stop

ONT12:05 pmOntario

$298

American Airlines

May 29

ONT1:10 pmOntario

7h 04m

1 stop

BOS11:14 pmBoston Logan Intl

Jun 2

BOS3:06 pmBoston Logan Intl

9h 51m

2 stops

ONT9:57 pmOntario

$302

American Airlines

May 18

ONT11:29 pmOntario

10h 15m

1 stop

BOS12:44 pmBoston Logan Intl

May 24

BOS6:20 amBoston Logan Intl

8h 45m

1 stop

ONT12:05 pmOntario

$327

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 9/1

7:13 pm-8:01 am

1 stop9h 48m

Boston Logan Intl

Wed 9/9

12:30 pm-6:19 pm

1 stop8h 49m

$292

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 5/28

4:57 pm-6:20 am

1 stop10h 23m

Boston Logan Intl

Wed 6/3

6:45 pm-11:34 pm

1 stop7h 49m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 5/23

10:00 pm-9:22 am

1 stop8h 22m

Boston Logan Intl

Fri 5/29

6:20 am-12:05 pm

1 stop8h 45m

$298

Quickest round-trip

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 5/29

1:10 pm-11:14 pm

1 stop7h 04m

Boston Logan Intl

Tue 6/2

3:06 pm-9:57 pm

2 stops9h 51m

$302

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 6/6

9:50 am-11:35 pm

2 stops10h 45m

Boston Logan Intl

Fri 6/12

7:55 am-3:05 pm

2 stops10h 10m

$307

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 10/2

5:05 pm-6:09 am

1 stop10h 04m

Boston Logan Intl

Sat 10/31

6:25 pm-11:48 pm

1 stop8h 23m

$318

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 5/29

12:40 pm-12:04 am

1 stop8h 24m

Boston Logan Intl

Sat 6/6

6:00 am-11:51 am

1 stop8h 51m

$323

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 7/22

1:20 pm-12:45 am

1 stop8h 25m

Boston Logan Intl

Tue 7/28

5:25 am-12:05 pm

1 stop9h 40m

$324

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 8/1

11:24 pm-12:17 pm

1 stop9h 53m

Portland

Wed 8/12

2:40 pm-10:35 pm

1 stop10h 55m

$366

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Mon 7/6

11:50 pm-12:21 pm

1 stop9h 31m

Portland

Wed 7/15

2:40 pm-10:35 pm

1 stop10h 55m

$415

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

What is the cheapest month to fly to Maine?

The cheapest month to fly to Maine from Ontario is in January. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel to Maine during the month of January, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $148.

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	6h 55m
Direct flights	None

The fastest flight from Ontario to Maine takes 6h 55m

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

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Frequently asked questions about flying from Ontario to Maine

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 May 2026, there are 5 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 8,460 reviews	Search Delta flights
American Airlines	PriceFrom $256	Free Cancellation	Rating 7.1 11,673 reviews	Search American Airlines flights
Southwest	PriceFrom $383	Free Cancellation	Rating 7.9 4,307 reviews	Search Southwest flights
United Airlines	PriceFrom $396	Free Cancellation	Rating 7.4 9,680 reviews	Search United Airlines 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.