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

Delta, United Airlines, and American Airlines 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 46% of people opting to fly with this airline when traveling to Maine. Keep in mind that there are 5 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 August 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.

$120 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.

6:53 pm - 8:23 amONT Ontario-BOS Boston Logan Intl

10h 30m1 stop San Francisco

7:30 am - 12:33 pmBOS Boston Logan Intl-ONT Ontario

8h 03m1 stop Denver Intl

$236United Airlines

Wed, Jan 6 - Tue, Jan 12

6:45 am - 4:35 pmONT Ontario-BOS Boston Logan Intl

6h 50m1 stop Chicago Midway

5:05 am - 10:15 amBOS Boston Logan Intl-ONT Ontario

8h 10m1 stop Denver Intl

$240Southwest

Wed, Jan 6 - Wed, Jan 13

12:40 pm - 1:10 amONT Ontario-BOS Boston Logan Intl

9h 30m1 stop Denver Intl

5:00 am - 10:10 amBOS Boston Logan Intl-ONT Ontario

8h 10m1 stop Denver Intl

$240Southwest

Thu, Oct 29 - Wed, Nov 4

7:00 am - 7:52 pmONT Ontario-BOS Boston Logan Intl

9h 52m1 stop Dallas/Fort Worth

5:17 am - 1:30 pmBOS Boston Logan Intl-ONT Ontario

11h 13m1 stop Dallas/Fort Worth

$241American Airlines

Sat, Oct 17 - Wed, Oct 21

10:25 am - 10:29 pmONT Ontario-BOS Boston Logan Intl

9h 04m1 stop Dallas/Fort Worth

10:00 am - 6:10 pmBOS Boston Logan Intl-ONT Ontario

11h 10m1 stop Phoenix Sky Harbor Intl

$241American Airlines

Wed, Sep 23 - Wed, Nov 18

9:01 am - 9:02 pmONT Ontario-BOS Boston Logan Intl

9h 01m1 stop San Francisco

3:49 pm - 9:59 pmBOS Boston Logan Intl-ONT Ontario

9h 10m1 stop Houston George Bush Intcntl

$241United Airlines

Tue, Sep 15 - Sat, Sep 19

12:17 pm - 11:28 pmONT Ontario-PWM Portland

8h 11m1 stop Atlanta Hartsfield-Jackson

6:00 am - 11:05 amPWM Portland-ONT Ontario

8h 05m1 stop Atlanta Hartsfield-Jackson

$297Delta

Mon, Sep 14 - Sat, Sep 19

12:17 pm - 11:29 pmONT Ontario-PWM Portland

8h 12m1 stop Atlanta Hartsfield-Jackson

6:00 am - 11:05 amPWM Portland-ONT Ontario

8h 05m1 stop Atlanta Hartsfield-Jackson

$297Delta

Wed, Sep 9 - Wed, Sep 16

4:09 pm - 5:40 amONT Ontario-BOS Boston Logan Intl

10h 31m1 stop Seattle/Tacoma Intl

7:13 am - 3:13 pmBOS Boston Logan Intl-ONT Ontario

11h 00m1 stop Seattle/Tacoma Intl

$347Alaska Airlines

Thu, Nov 12 - Mon, Nov 16

6:14 pm - 6:09 amONT Ontario-BOS Boston Logan Intl

8h 55m1 stop Portland

9:33 am - 5:18 pmBOS Boston Logan Intl-ONT Ontario

10h 45m1 stop Portland

$347Alaska Airlines

Mon, Sep 14 - Tue, Sep 22

Cheap last minute flights

Enter your travel dates to find the best prices.

1:06 pm - 11:57 pmONT Ontario-BOS Boston Logan Intl

7h 51m1 stop Salt Lake City

5:30 am - 10:42 amBOS Boston Logan Intl-ONT Ontario

8h 12m1 stop Atlanta Hartsfield-Jackson

$421Delta

Tue, Aug 18 - Tue, Sep 1

7:05 am - 6:10 pmONT Ontario-BOS Boston Logan Intl

8h 05m1 stop Atlanta Hartsfield-Jackson

5:30 am - 10:42 amBOS Boston Logan Intl-ONT Ontario

8h 12m1 stop Atlanta Hartsfield-Jackson

$421Delta

Tue, Aug 18 - Tue, Sep 1

12:33 pm - 11:37 pmONT Ontario-BOS Boston Logan Intl

8h 04m1 stop Dallas/Fort Worth

6:45 am - 11:43 amBOS Boston Logan Intl-ONT Ontario

7h 58m1 stop Dallas/Fort Worth

$467American Airlines

Sat, Aug 15 - Sun, Aug 30

10:29 am - 11:37 pmONT Ontario-BOS Boston Logan Intl

10h 08m1 stop Dallas/Fort Worth

6:45 am - 11:43 amBOS Boston Logan Intl-ONT Ontario

7h 58m1 stop Dallas/Fort Worth

$467American Airlines

Tue, Aug 18 - Wed, Aug 26

5:32 pm - 6:20 amONT Ontario-BOS Boston Logan Intl

9h 48m1 stop Portland

9:33 am - 5:10 pmBOS Boston Logan Intl-ONT Ontario

10h 37m1 stop Portland

$476Alaska Airlines

Sat, Aug 15 - Sat, Aug 29

5:32 pm - 6:20 amONT Ontario-BOS Boston Logan Intl

9h 48m1 stop Portland

9:33 am - 5:10 pmBOS Boston Logan Intl-ONT Ontario

10h 37m1 stop Portland

$476Alaska Airlines

Sat, Aug 15 - Sat, Aug 29

5:00 am - 9:58 pmONT Ontario-BOS Boston Logan Intl

13h 58m2 stops Denver Intl Chicago O'Hare Intl

9:26 am - 8:53 pmBOS Boston Logan Intl-ONT Ontario

14h 27m2 stops Newark Denver Intl

$576United Airlines

Sat, Aug 15 - Sun, Aug 30

5:00 am - 9:58 pmONT Ontario-BOS Boston Logan Intl

13h 58m2 stops Denver Intl Chicago O'Hare Intl

9:26 am - 8:53 pmBOS Boston Logan Intl-ONT Ontario

14h 27m2 stops Newark Denver Intl

$596United Airlines

Sat, Aug 15 - Sun, Aug 30

5:35 am - 11:35 pmONT Ontario-BOS Boston Logan Intl

15h 00m2 stops Phoenix Sky Harbor Intl Nashville Intl

7:30 am - 4:00 pmBOS Boston Logan Intl-ONT Ontario

11h 30m2 stops Chicago Midway Phoenix Sky Harbor Intl

$710Southwest

Sun, Aug 16 - Sun, Aug 23

5:35 am - 11:35 pmONT Ontario-BOS Boston Logan Intl

15h 00m2 stops Phoenix Sky Harbor Intl Nashville Intl

5:00 am - 12:00 pmBOS Boston Logan Intl-ONT Ontario

10h 00m2 stops Lambert-St Louis Austin Bergstrom

$736Southwest

Sun, Aug 16 - Thu, Aug 20

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American Airlines flights from Ontario to Maine

Our best American Airlines deals on Ontario to Maine flight tickets

American Airlines

Sep 22

ONT12:37 pmOntario

7h 57m

1 stop

BOS11:34 pmBoston Logan Intl

Oct 13

BOS5:17 amBoston Logan Intl

11h 13m

1 stop

ONT1:30 pmOntario

$303

American Airlines

Sep 2

ONT6:00 amOntario

14h 47m

2 stops

PWM11:47 pmPortland

Sep 5

PWM8:00 amPortland

13h 58m

2 stops

ONT6:58 pmOntario

$307

American Airlines

Oct 13

ONT11:59 pmOntario

13h 58m

2 stops

PWM4:57 pmPortland

Oct 20

PWM6:00 amPortland

12h 16m

2 stops

ONT3:16 pmOntario

$315

Alaska Airlines flights from Ontario to Maine

Our best Alaska Airlines deals on Ontario to Maine flight tickets

Alaska Airlines

Sep 14

ONT6:14 pmOntario

8h 55m

1 stop

BOS6:09 amBoston Logan Intl

Sep 24

BOS4:48 pmBoston Logan Intl

9h 36m

1 stop

ONT11:24 pmOntario

$347

Alaska Airlines

Sep 11

ONT6:14 pmOntario

8h 55m

1 stop

BOS6:09 amBoston Logan Intl

Sep 12

BOS9:33 amBoston Logan Intl

10h 45m

1 stop

ONT5:18 pmOntario

$351

Alaska Airlines

Sep 11

ONT6:14 pmOntario

8h 55m

1 stop

BOS6:09 amBoston Logan Intl

Sep 15

BOS7:12 amBoston Logan Intl

10h 04m

1 stop

ONT2:16 pmOntario

$357

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Wed 1/6

6:53 pm-8:23 am

1 stop10h 30m

Boston Logan Intl

Tue 1/12

7:30 am-12:33 pm

1 stop8h 03m

$236

Quickest round-trip

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Wed 1/6

6:45 am-4:35 pm

1 stop6h 50m

Boston Logan Intl

Wed 1/13

5:05 am-10:15 am

1 stop8h 10m

$240

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Thu 10/29

12:40 pm-1:10 am

1 stop9h 30m

Boston Logan Intl

Wed 11/4

5:00 am-10:10 am

1 stop8h 10m

$240

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Sat 10/17

7:00 am-7:52 pm

1 stop9h 52m

Boston Logan Intl

Wed 10/21

5:17 am-1:30 pm

1 stop11h 13m

$241

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Wed 9/23

10:25 am-10:29 pm

1 stop9h 04m

Boston Logan Intl

Wed 11/18

10:00 am-6:10 pm

1 stop11h 10m

$241

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Tue 9/15

9:01 am-9:02 pm

1 stop9h 01m

Boston Logan Intl

Sat 9/19

3:49 pm-9:59 pm

1 stop9h 10m

$241

OntarioPortland

ONT Ontario - PWM Portland

ONTPWM

Ontario

Mon 9/14

12:17 pm-11:28 pm

1 stop8h 11m

Portland

Sat 9/19

6:00 am-11:05 am

1 stop8h 05m

$297

OntarioPortland

ONT Ontario - PWM Portland

ONTPWM

Ontario

Wed 9/9

12:17 pm-11:29 pm

1 stop8h 12m

Portland

Wed 9/16

6:00 am-11:05 am

1 stop8h 05m

$297

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Thu 11/12

4:09 pm-5:40 am

1 stop10h 31m

Boston Logan Intl

Mon 11/16

7:13 am-3:13 pm

1 stop11h 00m

$347

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Mon 9/14

6:14 pm-6:09 am

1 stop8h 55m

Boston Logan Intl

Tue 9/22

9:33 am-5:18 pm

1 stop10h 45m

$347

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

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 August is also cheap. Prices for this month can be found on momondo for an average of $403.

Can stopping save me money on Ontario to Maine flights?

You could potentially save up to 37% 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 50m
Direct flights	None

The fastest flight from Ontario to Maine takes 6h 50m

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

Search flight deals

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 August 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
Southwest	PriceFrom $361	Free Cancellation	Rating 8.0 4,218 reviews	Search Southwest flights
American Airlines	PriceFrom $373	Free Cancellation	Rating 7.1 11,923 reviews	Search American Airlines flights
United Airlines	PriceFrom $409	Free Cancellation	Rating 7.4 10,113 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.