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 55% 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 8h 05m on average, while flying from Augusta to Los Angeles is 8h 58m on average. Los Angeles is the most popular airport in Ontario.

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

Frontier, United Airlines, and Alaska Airlines are the most popular carriers operating 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 2025, 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.

$113 Cheap Flights from Maine to Ontario in 2025

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Find the cheapest flights from Maine to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

12:20 pm - 11:50 pmBOS-ONT

14h 30m2 stops

7:44 pm - 10:48 amONT-BOS

12h 04m2 stops

$234Frontier

Find Deal

Thu, Oct 30 - Fri, Nov 7

12:22 pm - 11:50 pmBOS-ONT

14h 28m2 stops

12:49 pm - 8:33 amONT-BOS

16h 44m2 stops

$235Frontier

Find Deal

Thu, Oct 23 - Sun, Oct 26

7:00 am - 3:12 pmBOS-ONT

11h 12m1 stop

11:30 am - 11:59 pmONT-BOS

9h 29m1 stop

$256Alaska Airlines

Find Deal

Wed, Jan 28 - Wed, Feb 4

3:55 pm - 9:36 pmBOS-ONT

8h 41m1 stop

12:47 pm - 11:27 pmONT-BOS

7h 40m1 stop

$257American Airlines

Find Deal

Tue, Oct 7 - Tue, Oct 21

6:00 am - 1:43 pmBOS-ONT

10h 43m2 stops

12:47 pm - 11:27 pmONT-BOS

7h 40m1 stop

$262American Airlines

Find Deal

Tue, Oct 7 - Tue, Oct 21

7:00 am - 3:12 pmBOS-ONT

11h 12m1 stop

11:30 am - 11:59 pmONT-BOS

9h 29m1 stop

$266Alaska Airlines

Find Deal

Wed, Jan 28 - Thu, Feb 5

4:27 pm - 10:30 pmBOS-ONT

9h 03m1 stop

6:04 am - 5:47 pmONT-BOS

8h 43m1 stop

$267United Airlines

Find Deal

Wed, Sep 10 - Sat, Sep 13

7:30 am - 12:32 pmBOS-ONT

8h 02m1 stop

5:10 am - 6:55 pmONT-BOS

10h 45m2 stops

$272United Airlines

Find Deal

Wed, Sep 10 - Sat, Sep 13

5:30 am - 10:35 amBOS-ONT

8h 05m1 stop

10:50 am - 10:55 pmONT-BOS

9h 05m1 stop

$275Southwest

Find Deal

Wed, Dec 3 - Sun, Dec 7

6:20 pm - 12:05 amBOS-ONT

8h 45m1 stop

5:45 am - 7:10 pmONT-BOS

10h 25m2 stops

$290Southwest

Find Deal

Sun, Dec 14 - Wed, Dec 17

Frontier flights from Maine to Ontario

Our best Frontier deals on Maine to Ontario flight tickets

Frontier

Oct 30

BOS12:20 pmBoston Logan Intl

14h 30m

2 stops

ONT11:50 pmOntario

Nov 7

ONT7:44 pmOntario

12h 04m

2 stops

BOS10:48 amBoston Logan Intl

$234

Find similar

Frontier

Oct 23

BOS12:22 pmBoston Logan Intl

14h 28m

2 stops

ONT11:50 pmOntario

Oct 26

ONT12:49 pmOntario

16h 44m

2 stops

BOS8:33 amBoston Logan Intl

$235

Find similar

Frontier

Sep 18

BOS10:13 amBoston Logan Intl

11h 22m

2 stops

ONT6:35 pmOntario

Sep 19

ONT12:28 pmOntario

16h 43m

2 stops

BOS8:11 amBoston Logan Intl

$254

Find similar

American Airlines flights from Maine to Ontario

Our best American Airlines deals on Maine to Ontario flight tickets

American Airlines

Oct 7

BOS3:55 pmBoston Logan Intl

8h 41m

1 stop

ONT9:36 pmOntario

Oct 21

ONT12:47 pmOntario

7h 40m

1 stop

BOS11:27 pmBoston Logan Intl

$257

Find similar

American Airlines

Oct 7

BOS6:00 amBoston Logan Intl

10h 43m

2 stops

ONT1:43 pmOntario

Oct 21

ONT12:47 pmOntario

7h 40m

1 stop

BOS11:27 pmBoston Logan Intl

$262

Find similar

American Airlines

Dec 4

BOS11:25 amBoston Logan Intl

11h 47m

1 stop

ONT8:12 pmOntario

Dec 8

ONT8:05 pmOntario

8h 51m

2 stops

BOS7:56 amBoston Logan Intl

$282

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 10/30

12:20 pm-11:50 pm

2 stops14h 30m

Ontario

Fri 11/7

7:44 pm-10:48 am

2 stops12h 04m

$234

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 10/23

12:22 pm-11:50 pm

2 stops14h 28m

Ontario

Sun 10/26

12:49 pm-8:33 am

2 stops16h 44m

$235

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 1/28

7:00 am-3:12 pm

1 stop11h 12m

Ontario

Wed 2/4

11:30 am-11:59 pm

1 stop9h 29m

$256

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 10/7

3:55 pm-9:36 pm

1 stop8h 41m

Ontario

Tue 10/21

12:47 pm-11:27 pm

1 stop7h 40m

$257

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 10/7

6:00 am-1:43 pm

2 stops10h 43m

Ontario

Tue 10/21

12:47 pm-11:27 pm

1 stop7h 40m

$262

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 1/28

7:00 am-3:12 pm

1 stop11h 12m

Ontario

Thu 2/5

11:30 am-11:59 pm

1 stop9h 29m

$266

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 9/10

4:27 pm-10:30 pm

1 stop9h 03m

Ontario

Sat 9/13

6:04 am-5:47 pm

1 stop8h 43m

$267

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 9/10

7:30 am-12:32 pm

1 stop8h 02m

Ontario

Sat 9/13

5:10 am-6:55 pm

2 stops10h 45m

$272

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 12/3

5:30 am-10:35 am

1 stop8h 05m

Ontario

Sun 12/7

10:50 am-10:55 pm

1 stop9h 05m

$275

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sun 12/14

6:20 pm-12:05 am

1 stop8h 45m

Ontario

Wed 12/17

5:45 am-7:10 pm

2 stops10h 25m

$290

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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 day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Saturday when prices can be found for as low as $418. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Maine to Ontario for around $792.

What is the cheapest time of day to depart on your flight to Ontario?

In the afternoon is the cheapest time of day to fly from Maine to Ontario when you can find flight prices for as low as $436. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $653 on average. Flights to Ontario from Maine in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

Can stopping save me money on Maine to Ontario flights?

You could potentially save up to 16% 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

Direct flights	None

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

Search flight deals

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 2025, 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
American Airlines	PriceFrom $279	Free Cancellation	Rating 7.2 10,000 reviews		Search American Airlines flights
Delta	PriceFrom $302	Free Cancellation	Rating 7.9 7,982 reviews		Search Delta 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 $113

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 10/24. 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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Big names and deals

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Filter for what you want

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Frontier flights from Maine to Ontario

Our best Frontier deals on Maine to Ontario flight tickets

American Airlines flights from Maine to Ontario

Our best American Airlines deals on Maine to Ontario flight tickets

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Use the filters below to find and compare flights from Maine to Ontario that are best for you.

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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

What is the cheapest day to depart on your flight to Ontario?

What is the cheapest time of day to depart on your flight to Ontario?

Can stopping save me money on Maine to Ontario flights?

You could potentially save up to 16% on your flight if you consider stops on a Maine to Ontario flight.

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

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

What airlines fly to Ontario?

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 8h 05m on average, while flying from Augusta to Los Angeles is 8h 58m on average. Los Angeles is the most popular airport in Ontario.

Cheap Maine to Ontario flight deals and tips

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

Direct flights

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

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

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

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

Best airlines flying from Maine to Ontario

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

Why use momondo?

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

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

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

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

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