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

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

What airlines fly to Ontario?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Ontario from Maine 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 Ontario. Keep in mind that there are 5 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Ontario?

Average flight duration from Maine to Ontario depends on which airport you fly into and out of. Flying from Portland to Los Angeles is 6h 25m on average, while flying from Bangor to Los Angeles is 8h 23m on average. Los Angeles is the most popular airport in Ontario.

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

Prices for flights from Maine to Ontario Airport are refreshed on a daily basis.

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

As of August 2026, there are 5 operators available to choose from for flights from Maine to Ontario Airport.

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

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 Maine to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$109 Cheap Flights from Maine to Ontario in 2026

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Find the cheapest flights from Maine to Los Angeles

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6:05 am - 12:10 pmBOS Boston Logan Intl-ONT Ontario

9h 05m1 stop Salt Lake City

7:00 am - 8:23 pmONT Ontario-BOS Boston Logan Intl

10h 23m1 stop Atlanta Hartsfield-Jackson

$332Delta

Mon, Nov 23 - Thu, Nov 26

6:05 am - 12:21 pmBOS Boston Logan Intl-ONT Ontario

9h 16m1 stop Salt Lake City

11:15 pm - 9:44 amONT Ontario-BOS Boston Logan Intl

7h 29m1 stop Atlanta Hartsfield-Jackson

$332Delta

Thu, Oct 22 - Sun, Oct 25

6:00 am - 12:18 pmBOS Boston Logan Intl-ONT Ontario

9h 18m1 stop San Francisco

9:25 am - 11:21 pmONT Ontario-BOS Boston Logan Intl

10h 56m1 stop San Francisco

$351United Airlines

Thu, Oct 22 - Mon, Oct 26

9:00 am - 6:01 pmBOS Boston Logan Intl-ONT Ontario

12h 01m1 stop San Francisco

1:29 pm - 11:50 pmONT Ontario-BOS Boston Logan Intl

7h 21m1 stop Denver Intl

$351United Airlines

Sat, Oct 31 - Tue, Nov 3

4:23 pm - 10:59 pmPWM Portland-ONT Ontario

9h 36m1 stop Charlotte Douglas

11:59 pm - 2:32 pmONT Ontario-PWM Portland

11h 33m2 stops Dallas/Fort Worth Washington, D.C. Reagan-National

$364American Airlines

Fri, Oct 30 - Fri, Nov 6

6:45 am - 1:31 pmBOS Boston Logan Intl-ONT Ontario

9h 46m1 stop Dallas/Fort Worth

10:00 am - 11:24 pmONT Ontario-BOS Boston Logan Intl

10h 24m1 stop Phoenix Sky Harbor Intl

$367American Airlines

Wed, Sep 2 - Sun, Sep 6

4:48 pm - 11:16 amBOS Boston Logan Intl-ONT Ontario

21h 28m1 stop Seattle/Tacoma Intl

7:12 am - 6:09 amONT Ontario-BOS Boston Logan Intl

19h 57m1 stop Portland

$367Alaska Airlines

Tue, Sep 22 - Tue, Sep 29

9:03 am - 5:03 pmBOS Boston Logan Intl-ONT Ontario

11h 00m1 stop Portland

10:40 am - 7:20 amONT Ontario-BOS Boston Logan Intl

17h 40m1 stop Portland

$367Alaska Airlines

Fri, Nov 13 - Mon, Nov 16

3:25 pm - 10:15 pmPWM Portland-ONT Ontario

9h 50m2 stops Baltimore/Washington Denver Intl

11:55 pm - 2:45 pmONT Ontario-PWM Portland

11h 50m2 stops Chicago Midway Baltimore/Washington

$369Southwest

Fri, Oct 30 - Fri, Nov 6

5:00 am - 9:55 amBOS Boston Logan Intl-ONT Ontario

7h 55m1 stop Denver Intl

8:35 am - 9:15 pmONT Ontario-BOS Boston Logan Intl

9h 40m2 stops Nashville Intl Baltimore/Washington

$372Southwest

Thu, Oct 22 - Tue, Oct 27

Cheap last minute flights

Enter your travel dates to find the best prices.

7:45 am - 3:41 pmBOS Boston Logan Intl-ONT Ontario

10h 56m1 stop San Francisco

1:18 pm - 11:52 pmONT Ontario-BOS Boston Logan Intl

7h 34m1 stop Denver Intl

$456United Airlines

Sat, Aug 22 - Sat, Sep 19

7:45 am - 3:41 pmBOS Boston Logan Intl-ONT Ontario

10h 56m1 stop San Francisco

1:18 pm - 11:54 pmONT Ontario-BOS Boston Logan Intl

7h 36m1 stop Denver Intl

$456United Airlines

Sat, Aug 22 - Tue, Sep 1

6:45 am - 1:53 pmBOS Boston Logan Intl-ONT Ontario

10h 08m1 stop Dallas/Fort Worth

12:37 pm - 12:30 amONT Ontario-BOS Boston Logan Intl

8h 53m1 stop Dallas/Fort Worth

$467American Airlines

Sat, Aug 22 - Thu, Oct 1

11:35 am - 6:15 pmBOS Boston Logan Intl-ONT Ontario

9h 40m2 stops Charlotte Douglas Phoenix Sky Harbor Intl

12:37 pm - 12:30 amONT Ontario-BOS Boston Logan Intl

8h 53m1 stop Dallas/Fort Worth

$472American Airlines

Sat, Aug 22 - Thu, Oct 1

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

8h 12m1 stop Atlanta Hartsfield-Jackson

12:00 pm - 11:41 pmONT Ontario-BOS Boston Logan Intl

8h 41m1 stop Atlanta Hartsfield-Jackson

$477Delta

Sun, Aug 23 - Mon, Aug 31

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

8h 12m1 stop Atlanta Hartsfield-Jackson

10:00 pm - 9:39 amONT Ontario-BOS Boston Logan Intl

8h 39m1 stop Atlanta Hartsfield-Jackson

$477Delta

Sun, Aug 23 - Sun, Aug 30

1:00 pm - 8:50 pmBOS Boston Logan Intl-ONT Ontario

10h 50m2 stops Chicago Midway Denver Intl

7:25 am - 9:25 pmONT Ontario-BOS Boston Logan Intl

11h 00m2 stops Nashville Intl Baltimore/Washington

$493Southwest

Sat, Aug 22 - Tue, Sep 1

7:12 am - 2:09 pmBOS Boston Logan Intl-ONT Ontario

9h 57m1 stop Seattle/Tacoma Intl

6:05 pm - 6:09 amONT Ontario-BOS Boston Logan Intl

9h 04m1 stop Portland

$531Alaska Airlines

Sat, Aug 22 - Tue, Sep 1

7:12 am - 2:09 pmBOS Boston Logan Intl-ONT Ontario

9h 57m1 stop Seattle/Tacoma Intl

6:05 pm - 6:09 amONT Ontario-BOS Boston Logan Intl

9h 04m1 stop Portland

$531Alaska Airlines

Sat, Aug 22 - Mon, Aug 31

2:10 pm - 6:55 pmBOS Boston Logan Intl-ONT Ontario

7h 45m1 stop Nashville Intl

1:00 pm - 11:15 pmONT Ontario-BOS Boston Logan Intl

7h 15m1 stop Denver Intl

$545Southwest

Wed, Aug 19 - Sat, Aug 22

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Delta flights from Maine to Ontario

Our best Delta deals on Maine to Ontario flight tickets

Delta

Sep 23

PWM6:00 amPortland

8h 09m

1 stop

ONT11:09 amOntario

Oct 23

ONT12:16 pmOntario

8h 19m

1 stop

PWM11:35 pmPortland

$359

Delta

Sep 4

BOS6:05 amBoston Logan Intl

9h 11m

1 stop

ONT12:16 pmOntario

Sep 13

ONT5:15 pmOntario

10h 15m

1 stop

BOS6:30 amBoston Logan Intl

$367

Delta

Sep 25

BOS6:45 pmBoston Logan Intl

8h 02m

1 stop

ONT11:47 pmOntario

Oct 26

ONT11:15 pmOntario

7h 29m

1 stop

BOS9:44 amBoston Logan Intl

$403

Alaska Airlines flights from Maine to Ontario

Our best Alaska Airlines deals on Maine to Ontario flight tickets

Alaska Airlines

Sep 10

BOS5:42 pmBoston Logan Intl

19h 09m

1 stop

ONT9:51 amOntario

Sep 16

ONT10:47 amOntario

16h 22m

1 stop

BOS6:09 amBoston Logan Intl

$390

Alaska Airlines

Jan 5

BOS4:56 pmBoston Logan Intl

20h 04m

1 stop

ONT10:00 amOntario

Jan 9

ONT11:36 amOntario

15h 04m

1 stop

BOS5:40 amBoston Logan Intl

$413

Alaska Airlines

Oct 3

BOS7:51 amBoston Logan Intl

12h 14m

2 stops

ONT5:05 pmOntario

Oct 5

ONT6:56 pmOntario

9h 30m

1 stop

BOS7:26 amBoston Logan Intl

$423

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonOntario

BOS Boston Logan Intl - ONT Ontario

BOSONT

Boston Logan Intl

Mon 11/23

6:05 am-12:10 pm

1 stop9h 05m

Ontario

Thu 11/26

7:00 am-8:23 pm

1 stop10h 23m

$332

Quickest round-trip

BostonOntario

BOS Boston Logan Intl - ONT Ontario

BOSONT

Boston Logan Intl

Thu 10/22

6:05 am-12:21 pm

1 stop9h 16m

Ontario

Sun 10/25

11:15 pm-9:44 am

1 stop7h 29m

$332

BostonOntario

BOS Boston Logan Intl - ONT Ontario

BOSONT

Boston Logan Intl

Thu 10/22

6:00 am-12:18 pm

1 stop9h 18m

Ontario

Mon 10/26

9:25 am-11:21 pm

1 stop10h 56m

$351

BostonOntario

BOS Boston Logan Intl - ONT Ontario

BOSONT

Boston Logan Intl

Sat 10/31

9:00 am-6:01 pm

1 stop12h 01m

Ontario

Tue 11/3

1:29 pm-11:50 pm

1 stop7h 21m

$351

PortlandOntario

PWM Portland - ONT Ontario

PWMONT

Portland

Fri 10/30

4:23 pm-10:59 pm

1 stop9h 36m

Ontario

Fri 11/6

11:59 pm-2:32 pm

2 stops11h 33m

$364

BostonOntario

BOS Boston Logan Intl - ONT Ontario

BOSONT

Boston Logan Intl

Wed 9/2

6:45 am-1:31 pm

1 stop9h 46m

Ontario

Sun 9/6

10:00 am-11:24 pm

1 stop10h 24m

$367

BostonOntario

BOS Boston Logan Intl - ONT Ontario

BOSONT

Boston Logan Intl

Tue 9/22

4:48 pm-11:16 am

1 stop21h 28m

Ontario

Tue 9/29

7:12 am-6:09 am

1 stop19h 57m

$367

BostonOntario

BOS Boston Logan Intl - ONT Ontario

BOSONT

Boston Logan Intl

Fri 11/13

9:03 am-5:03 pm

1 stop11h 00m

Ontario

Mon 11/16

10:40 am-7:20 am

1 stop17h 40m

$367

PortlandOntario

PWM Portland - ONT Ontario

PWMONT

Portland

Fri 10/30

3:25 pm-10:15 pm

2 stops9h 50m

Ontario

Fri 11/6

11:55 pm-2:45 pm

2 stops11h 50m

$369

BostonOntario

BOS Boston Logan Intl - ONT Ontario

BOSONT

Boston Logan Intl

Thu 10/22

5:00 am-9:55 am

1 stop7h 55m

Ontario

Tue 10/27

8:35 am-9:15 pm

2 stops9h 40m

$372

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 Maine to Ontario

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 Ontario?

In general, November is the cheapest month to fly from Maine to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you aren’t able to travel during the month of November, then book flights to Ontario from Maine during January instead. Flights to Ontario in January, while not as cheap as those in November, still average around $0.

Can stopping save me money on Maine to Ontario flights?

You could potentially save up to 4% on your flight if you consider stops on a Maine to Ontario flight.

Cheap Maine to Ontario flight deals and tips

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

Best Price Found	$109
Fastest flight time	7h 45m
Direct flights	None

The best one-way flight to Ontario from Maine in the past 72 hours is $109. The best round-trip flight deal from Maine to Ontario found on momondo in the last 72 hours is $332.

The fastest flight from Maine to Ontario takes 7h 45m

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

Search flight deals

Frequently asked questions about flying from Maine to Ontario

When did momondo last update prices for flights from Maine to Ontario Airport?
Prices for flights from Maine to Ontario Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Maine to Ontario Airport?
As of August 2026, there are 5 operators available to choose from for flights from Maine to Ontario Airport.
How old do you have to be to fly from Maine to Ontario Airport?
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 Maine to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Maine to Ontario

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $302	Free Cancellation	Rating 7.8 8,499 reviews		Search Delta flights
American Airlines	PriceFrom $360	Free Cancellation	Rating 7.1 11,961 reviews		Search American Airlines flights

Why use momondo?

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

It is quick and easy to find Maine to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

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

Flights from Maine to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo helps you find the best flight between Maine and Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to Ontario from Maine. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from Maine to Los Angeles from $109

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Maine to Los Angeles departing on 9/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Delta flights from Maine to Ontario

Our best Delta deals on Maine to Ontario flight tickets

Alaska Airlines flights from Maine to Ontario

Our best Alaska Airlines deals on Maine to Ontario flight tickets

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How to get the cheapest flight ticket from Maine to Ontario

What is the cheapest month to fly to Ontario?

Can stopping save me money on Maine to Ontario flights?

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

What airlines fly to Ontario?

How long does it take to fly to Ontario?

Cheap Maine to Ontario flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Maine to Ontario

Best airlines flying from Maine to Ontario

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

Why use momondo?

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing California

Fly your favorite airline to Los Angeles

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Los Angeles

List of cabin classes available on flights landing in Los Angeles. Availability may vary depending on flight origin and airline.

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Popular flights according to clicks in the last 7 days on momondo

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