What airlines fly to Portland, Maine?

JetBlue, United Airlines and Delta are the top three most popular airlines that fly to Portland, Maine from Ontario according to our data. JetBlue is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Portland, Maine. Keep in mind that there are 9 different airlines that fly to Portland, Maine on a routine basis, so you have a few additional options to choose from.

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

United Airlines is the most popular carrier operating from Ontario to Portland

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

Prices for flights from Ontario Airport to Portland Airport are updated daily.

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

There are 4 operators available for flights from Ontario Airport to Portland Airport as of December 2025.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Portland Airport.

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

The travel and health documents you'll need for your trip to Portland 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 Portland Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$181 Cheap Flights from Ontario to Portland in 2025/26

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Find the cheapest flights from Ontario to Portland

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6:32 pm - 9:01 am

ONT

PWM

11h 29m2 stops

11:12 am - 8:58 pm

PWM

ONT

12h 46m2 stops

$361United Airlines

Sat, Jan 17 - Tue, Jan 20

5:05 am - 2:31 pm

ONT

PWM

30h 26m3 stops

11:12 am - 10:53 pm

PWM

ONT

14h 41m2 stops

$509United Airlines

Sat, Jan 17 - Tue, Jan 20

1:24 pm - 9:01 am

ONT

PWM

16h 37m2 stops

11:12 am - 8:58 pm

PWM

ONT

12h 46m2 stops

$540United Airlines

Sat, Jan 17 - Tue, Jan 20

6:32 pm - 9:01 am

ONT

PWM

11h 29m2 stops

4:10 pm - 12:47 pm

PWM

ONT

23h 37m2 stops

$565United Airlines

Sat, Jan 17 - Tue, Jan 20

6:39 pm - 9:01 am

ONT

PWM

11h 22m2 stops

11:12 am - 8:58 pm

PWM

ONT

12h 46m2 stops

$579United Airlines

Fri, Jan 9 - Tue, Jan 13

5:05 am - 2:31 pm

ONT

PWM

30h 26m3 stops

11:12 am - 8:58 pm

PWM

ONT

12h 46m2 stops

$608United Airlines

Sat, Jan 17 - Tue, Jan 20

United Airlines flights from Ontario to Portland, Maine

Our best United Airlines deals on Ontario to Portland, Maine flight tickets

United Airlines

Jan 17

ONT6:32 pmOntario

11h 29m

2 stops

PWM9:01 amPortland

Jan 20

PWM11:12 amPortland

12h 46m

2 stops

ONT8:58 pmOntario

$361

Find similar

United Airlines

Jan 17

ONT5:05 amOntario

30h 26m

3 stops

PWM2:31 pmPortland

Jan 20

PWM11:12 amPortland

14h 41m

2 stops

ONT10:53 pmOntario

$509

Find similar

United Airlines

Jan 17

ONT1:24 pmOntario

16h 37m

2 stops

PWM9:01 amPortland

Jan 20

PWM11:12 amPortland

12h 46m

2 stops

ONT8:58 pmOntario

$540

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 1/17

6:32 pm-9:01 am

2 stops11h 29m

Portland

Tue 1/20

11:12 am-8:58 pm

2 stops12h 46m

$361

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 1/17

5:05 am-2:31 pm

3 stops30h 26m

Portland

Tue 1/20

11:12 am-10:53 pm

2 stops14h 41m

$509

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 1/17

1:24 pm-9:01 am

2 stops16h 37m

Portland

Tue 1/20

11:12 am-8:58 pm

2 stops12h 46m

$540

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 1/17

6:32 pm-9:01 am

2 stops11h 29m

Portland

Tue 1/20

4:10 pm-12:47 pm

2 stops23h 37m

$565

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Fri 1/9

6:39 pm-9:01 am

2 stops11h 22m

Portland

Tue 1/13

11:12 am-8:58 pm

2 stops12h 46m

$579

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 1/17

5:05 am-2:31 pm

3 stops30h 26m

Portland

Tue 1/20

11:12 am-8:58 pm

2 stops12h 46m

$608

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 1/17

6:32 pm-9:01 am

2 stops11h 29m

$181

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 1/13

6:49 pm-1:49 pm

2 stops16h 00m

$183

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Fri 1/23

6:39 pm-9:01 am

2 stops11h 22m

$204

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Wed 2/18

6:09 am-11:20 pm

2 stops14h 11m

$235

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Portland, 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 day to depart on your flight to Portland, Maine?

On average, the least expensive day to fly to Portland, Maine from Ontario is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $432. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $563.

What is the cheapest time of day to depart on your flight to Portland, Maine?

In the evening is the cheapest time of day to fly from Ontario to Portland, Maine when you can find flight prices for as low as $468. Flying to Portland, Maine in the evening is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $510. Of course, these prices can vary depending on the time of year and what airport you fly to.

Can stopping save me money on Ontario to Portland, Maine flights?

You could potentially save up to 49% on your flight if you consider stops on a Ontario to Portland, Maine flight.

How have Ontario to Portland, Maine flight prices changed over time?

When to book flights from Ontario to Portland, Maine

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Portland, Maine according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Ontario to Portland, Maine (ONT to PWM) flight deals and tips

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

Fastest flight time	7h 44m
Direct flights	None

The fastest flight from Ontario to Portland, Maine takes 7h 44m

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

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How far is Ontario to Portland by plane?
Ontario and Portland are 2595.5 mi apart from one another. A reasonable flight in good conditions will take 7h 44m.
When did momondo last update prices for flights from Ontario Airport to Portland Airport?
Prices for flights from Ontario Airport to Portland Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to Portland Airport?
There are 4 operators available for flights from Ontario Airport to Portland Airport as of December 2025.
How old do you have to be to fly from Ontario Airport to Portland Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Portland Airport.
What documentation or ID do you need to fly to Portland Airport?
The travel and health documents you'll need for your trip to Portland 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 Portland Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Ontario to Portland, Maine?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Ontario to Portland, Maine is United Airlines (32% of total bookings). The next most popular airlines are American Airlines (28%), Delta (20%), and Southwest (20%).

Best airlines flying from Ontario to Portland, Maine

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $148	Free Cancellation	Rating 7.9 8,012 reviews	Search Delta flights
American Airlines	PriceFrom $266	Free Cancellation	Rating 7.2 11,061 reviews	Search American Airlines flights
United Airlines	PriceFrom $380	Free Cancellation	Rating 7.4 9,115 reviews	Search United Airlines flights
Southwest	PriceFrom $383	Free Cancellation	Rating 8.0 4,258 reviews	Search Southwest flights

North Conway

Boothbay Harbor

Jackson

Conway

Freeport

Lewiston

Brunswick

Bartlett

Gorham

Auburn

Windham

Intervale

Oxford

Bath

Georgetown

Falmouth

Tamworth

Why use momondo?

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

Finding the right flight to Portland from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Portland quick and easy, saving you time and money.

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

All flight searches from Ontario to Portland on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Portland.

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

Yes. momondo can track prices for Ontario to Portland flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.