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 54% 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.

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

Alaska Airlines, Delta, and United Airlines are the most popular carriers operating from Maine 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 45m on average, while flying from Bangor to Los Angeles is 10h 26m 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 December 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 2025/26

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Find the cheapest flights from Maine to Los Angeles

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:15 am - 1:56 pm

BOS

ONT

9h 41m1 stop

3:30 pm - 6:50 am

ONT

BOS

12h 20m1 stop

$237Delta

Sun, Jan 25 - Sat, Jan 31

3:15 pm - 8:58 pm

BOS

ONT

8h 43m1 stop

5:05 am - 5:24 pm

ONT

BOS

9h 19m2 stops

$242United Airlines

Fri, Jan 9 - Sat, Jan 17

9:30 am - 5:43 pm

BOS

ONT

11h 13m2 stops

5:05 am - 5:24 pm

ONT

BOS

9h 19m2 stops

$247United Airlines

Fri, Jan 9 - Sat, Jan 17

7:00 am - 3:08 pm

BOS

ONT

11h 08m1 stop

11:53 am - 11:54 pm

ONT

BOS

9h 01m1 stop

$258Alaska Airlines

Wed, Jan 28 - Sat, Jan 31

4:25 pm - 10:26 pm

BOS

ONT

9h 01m1 stop

1:40 pm - 11:42 pm

ONT

BOS

7h 02m1 stop

$259United Airlines

Sat, Apr 25 - Sat, May 2

6:00 am - 12:03 pm

BOS

ONT

9h 03m1 stop

11:59 pm - 12:58 pm

ONT

BOS

9h 59m2 stops

$264American Airlines

Mon, Feb 2 - Mon, Feb 9

7:00 am - 3:08 pm

BOS

ONT

11h 08m1 stop

11:53 am - 11:54 pm

ONT

BOS

9h 01m1 stop

$297Alaska Airlines

Thu, Jan 22 - Fri, Jan 30

12:45 pm - 9:45 pm

PWM

ONT

12h 00m2 stops

6:50 am - 10:45 pm

ONT

PWM

12h 55m2 stops

$307Southwest

Mon, Feb 2 - Mon, Feb 9

5:30 am - 2:20 pm

PWM

ONT

11h 50m2 stops

11:55 pm - 12:20 pm

ONT

PWM

9h 25m2 stops

$429Southwest

Thu, May 14 - Mon, May 18

2:18 pm - 10:09 pm

PWM

ONT

10h 51m1 stop

11:25 pm - 1:23 pm

ONT

PWM

10h 58m1 stop

$529JetBlue

Thu, May 14 - Mon, May 18

Alaska Airlines flights from Maine to Ontario

Our best Alaska Airlines deals on Maine to Ontario flight tickets

Alaska Airlines

Jan 28

BOS7:00 amBoston Logan Intl

11h 08m

1 stop

ONT3:08 pmOntario

Jan 31

ONT11:53 amOntario

9h 01m

1 stop

BOS11:54 pmBoston Logan Intl

$258

Find similar

Alaska Airlines

Jan 22

BOS7:00 amBoston Logan Intl

11h 08m

1 stop

ONT3:08 pmOntario

Jan 30

ONT11:53 amOntario

9h 01m

1 stop

BOS11:54 pmBoston Logan Intl

$297

Find similar

Alaska Airlines

Feb 20

BOS4:36 pmBoston Logan Intl

10h 16m

1 stop

ONT11:52 pmOntario

Feb 26

ONT4:02 pmOntario

11h 52m

1 stop

BOS6:54 amBoston Logan Intl

$298

Find similar

American Airlines flights from Maine to Ontario

Our best American Airlines deals on Maine to Ontario flight tickets

American Airlines

Feb 2

BOS6:00 amBoston Logan Intl

9h 03m

1 stop

ONT12:03 pmOntario

Feb 9

ONT11:59 pmOntario

9h 59m

2 stops

BOS12:58 pmBoston Logan Intl

$264

Find similar

American Airlines

Jan 16

BOS2:13 pmBoston Logan Intl

11h 35m

1 stop

ONT10:48 pmOntario

Jan 23

ONT11:59 pmOntario

9h 59m

1 stop

BOS12:58 pmBoston Logan Intl

$307

Find similar

American Airlines

Jan 16

BOS8:50 amBoston Logan Intl

10h 15m

1 stop

ONT4:05 pmOntario

Jan 23

ONT9:59 amOntario

8h 56m

2 stops

BOS9:55 pmBoston Logan Intl

$312

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sun 1/25

7:15 am-1:56 pm

1 stop9h 41m

Ontario

Sat 1/31

3:30 pm-6:50 am

1 stop12h 20m

$237

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 1/9

3:15 pm-8:58 pm

1 stop8h 43m

Ontario

Sat 1/17

5:05 am-5:24 pm

2 stops9h 19m

$242

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 1/9

9:30 am-5:43 pm

2 stops11h 13m

Ontario

Sat 1/17

5:05 am-5:24 pm

2 stops9h 19m

$247

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 1/28

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Sat 1/31

11:53 am-11:54 pm

1 stop9h 01m

$258

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 4/25

4:25 pm-10:26 pm

1 stop9h 01m

Ontario

Sat 5/2

1:40 pm-11:42 pm

1 stop7h 02m

$259

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 2/2

6:00 am-12:03 pm

1 stop9h 03m

Ontario

Mon 2/9

11:59 pm-12:58 pm

2 stops9h 59m

$264

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 1/22

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Fri 1/30

11:53 am-11:54 pm

1 stop9h 01m

$297

PortlandOntario

PWM - ONT

PWMONT

Portland

Mon 2/2

12:45 pm-9:45 pm

2 stops12h 00m

Ontario

Mon 2/9

6:50 am-10:45 pm

2 stops12h 55m

$307

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 5/14

5:30 am-2:20 pm

2 stops11h 50m

Ontario

Mon 5/18

11:55 pm-12:20 pm

2 stops9h 25m

$429

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 5/14

2:18 pm-10:09 pm

1 stop10h 51m

Ontario

Mon 5/18

11:25 pm-1:23 pm

1 stop10h 58m

$529

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, January 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 $322. If you aren’t able to travel during the month of January, then book flights to Ontario from Maine during May instead. Flights to Ontario in May, while not as cheap as those in January, still average around $358.

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 Tuesday when prices can be found for as low as $401. 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 $569.

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

At noon is the cheapest time of day to fly from Maine to Ontario when you can find flight prices for as low as $428. Flying to Ontario at noon 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 evening when prices are $552 on average. Flights to Ontario from Maine in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Ontario?

You are more likely to see cheaper flights to Ontario from Maine when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $403 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Maine for as low as $296 on momondo.

Can stopping save me money on Maine to Ontario flights?

You could potentially save up to 52% 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

Fastest flight time	8h 03m
Direct flights	None

The fastest flight from Maine to Ontario takes 8h 03m

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 December 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
Delta	PriceFrom $259	Free Cancellation	Rating 7.9 8,005 reviews		Search Delta flights
American Airlines	PriceFrom $279	Free Cancellation	Rating 7.2 11,054 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.