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.

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 08m on average, while flying from Augusta to Los Angeles is 9h on average. Los Angeles is the most popular airport in Ontario.

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

Frontier, American Airlines, and United 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 October 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.

$89 Cheap Flights from Maine to Ontario in 2025/26

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Cheap round-trip flights

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5:55 am - 11:10 amBOS-ONT

8h 15m1 stop

11:30 am - 9:55 pmONT-BOS

7h 25m1 stop

$247Southwest

Find Deal

sáb., dic. 6 - sáb., dic. 13

5:20 am - 12:50 pmBOS-ONT

10h 30m2 stops

5:20 am - 3:50 pmONT-BOS

7h 30m1 stop

$253Southwest

Find Deal

sáb., dic. 6 - sáb., dic. 13

5:21 am - 1:55 pmBOS-ONT

11h 34m1 stop

11:59 pm - 1:37 pmONT-BOS

10h 38m1 stop

$265American Airlines

Find Deal

sáb., dic. 6 - dom., dic. 14

8:00 am - 4:02 pmBOS-ONT

11h 02m2 stops

11:59 pm - 1:37 pmONT-BOS

10h 38m1 stop

$270American Airlines

Find Deal

sáb., dic. 6 - dom., dic. 14

6:00 am - 12:18 pmBOS-ONT

9h 18m1 stop

6:41 pm - 7:36 amONT-BOS

9h 55m1 stop

$279United Airlines

Find Deal

jue., dic. 4 - lun., dic. 8

6:00 am - 5:41 pmPWM-ONT

14h 41m3 stops

11:50 pm - 1:57 pmONT-PWM

11h 07m2 stops

$289United Airlines

Find Deal

mar., mar. 3 - mar., mar. 10

7:00 am - 3:08 pmBOS-ONT

11h 08m1 stop

11:53 am - 11:59 pmONT-BOS

9h 06m1 stop

$292Alaska Airlines

Find Deal

lun., feb. 2 - jue., feb. 5

6:10 am - 12:34 pmBOS-ONT

9h 24m1 stop

10:25 pm - 11:15 amONT-BOS

9h 50m1 stop

$297Delta

Find Deal

jue., dic. 4 - lun., dic. 8

6:53 pm - 11:52 pmBOS-ONT

7h 59m1 stop

6:00 am - 4:10 pmONT-BOS

7h 10m1 stop

$302Delta

Find Deal

mar., nov. 18 - jue., nov. 27

4:46 pm - 11:56 pmBOS-ONT

10h 10m1 stop

11:59 am - 12:20 amONT-BOS

9h 21m1 stop

$306Alaska Airlines

Find Deal

vie., nov. 14 - mar., nov. 18

Southwest flights from Maine to Ontario

Our best Southwest deals on Maine to Ontario flight tickets

Southwest

Dec 6

BOS5:55 amBoston Logan Intl

8h 15m

1 stop

ONT11:10 amOntario

Dec 13

ONT11:30 amOntario

7h 25m

1 stop

BOS9:55 pmBoston Logan Intl

$247

Find similar

Southwest

Dec 6

BOS5:20 amBoston Logan Intl

10h 30m

2 stops

ONT12:50 pmOntario

Dec 13

ONT5:20 amOntario

7h 30m

1 stop

BOS3:50 pmBoston Logan Intl

$253

Find similar

Southwest

Jan 23

BOS5:30 amBoston Logan Intl

13h 35m

2 stops

ONT4:05 pmOntario

Jan 26

ONT5:45 pmOntario

12h 05m

2 stops

BOS8:50 amBoston Logan Intl

$324

Find similar

American Airlines flights from Maine to Ontario

Our best American Airlines deals on Maine to Ontario flight tickets

American Airlines

Dec 6

BOS5:21 amBoston Logan Intl

11h 34m

1 stop

ONT1:55 pmOntario

Dec 14

ONT11:59 pmOntario

10h 38m

1 stop

BOS1:37 pmBoston Logan Intl

$265

Find similar

American Airlines

Dec 6

BOS8:00 amBoston Logan Intl

11h 02m

2 stops

ONT4:02 pmOntario

Dec 14

ONT11:59 pmOntario

10h 38m

1 stop

BOS1:37 pmBoston Logan Intl

$270

Find similar

American Airlines

Jan 23

BOS12:29 pmBoston Logan Intl

8h 51m

1 stop

ONT6:20 pmOntario

Jan 26

ONT11:59 pmOntario

14h 21m

1 stop

BOS5:20 pmBoston Logan Intl

$275

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

sáb. 12/6

5:55 am-11:10 am

1 stop8h 15m

Ontario

sáb. 12/13

11:30 am-9:55 pm

1 stop7h 25m

$247

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

sáb. 12/6

5:20 am-12:50 pm

2 stops10h 30m

Ontario

sáb. 12/13

5:20 am-3:50 pm

1 stop7h 30m

$253

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

sáb. 12/6

5:21 am-1:55 pm

1 stop11h 34m

Ontario

dom. 12/14

11:59 pm-1:37 pm

1 stop10h 38m

$265

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

sáb. 12/6

8:00 am-4:02 pm

2 stops11h 02m

Ontario

dom. 12/14

11:59 pm-1:37 pm

1 stop10h 38m

$270

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

jue. 12/4

6:00 am-12:18 pm

1 stop9h 18m

Ontario

lun. 12/8

6:41 pm-7:36 am

1 stop9h 55m

$279

PortlandOntario

PWM - ONT

PWMONT

Portland

mar. 3/3

6:00 am-5:41 pm

3 stops14h 41m

Ontario

mar. 3/10

11:50 pm-1:57 pm

2 stops11h 07m

$289

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

lun. 2/2

7:00 am-3:08 pm

1 stop11h 08m

Ontario

jue. 2/5

11:53 am-11:59 pm

1 stop9h 06m

$292

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

jue. 12/4

6:10 am-12:34 pm

1 stop9h 24m

Ontario

lun. 12/8

10:25 pm-11:15 am

1 stop9h 50m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mar. 11/18

6:53 pm-11:52 pm

1 stop7h 59m

Ontario

jue. 11/27

6:00 am-4:10 pm

1 stop7h 10m

$302

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

vie. 11/14

4:46 pm-11:56 pm

1 stop10h 10m

Ontario

mar. 11/18

11:59 am-12:20 am

1 stop9h 21m

$306

Flights are sorted by cheapest round-trip flights first.

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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 41% 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 October 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 11,032 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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sáb. 11/22

sáb. 11/29

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Cheap flights from Maine to Los Angeles from $89

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 1/28. 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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Filter for what you want

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Southwest flights from Maine to Ontario

Our best Southwest 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 41% 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, American Airlines, and United 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 08m on average, while flying from Augusta to Los Angeles is 9h 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