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

Delta and United Airlines are the most popular carriers operating from Ontario to Portland

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 39% 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.

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 November 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.

$154 Cheap Flights from Ontario to Portland in 2025/26

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Find the cheapest flights from Ontario to Portland

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 11:59 pmONT-PWM

13h 59m2 stops

6:30 am - 6:15 pmPWM-ONT

14h 45m2 stops

$378Delta

Find Deal

Tue, Apr 14 - Wed, Apr 15

6:53 pm - 10:48 amONT-PWM

12h 55m2 stops

4:48 pm - 10:26 pmPWM-ONT

8h 38m1 stop

$402United Airlines

Find Deal

Tue, Apr 14 - Wed, Apr 15

11:15 am - 10:43 pmONT-PWM

8h 28m1 stop

5:30 am - 11:54 amPWM-ONT

9h 24m1 stop

$408Delta

Find Deal

Wed, Dec 24 - Thu, Jan 8

11:25 pm - 1:23 pmONT-PWM

10h 58m1 stop

2:18 pm - 10:09 pmPWM-ONT

10h 51m1 stop

$418JetBlue

Find Deal

Fri, May 1 - Sun, May 10

11:15 am - 10:43 pmONT-PWM

8h 28m1 stop

5:30 am - 11:54 amPWM-ONT

9h 24m1 stop

$443Delta

Find Deal

Wed, Dec 24 - Tue, Jan 6

5:00 am - 9:27 pmONT-PWM

13h 27m2 stops

11:17 am - 11:06 pmPWM-ONT

14h 49m2 stops

$458United Airlines

Find Deal

Tue, Apr 7 - Wed, Apr 8

5:05 am - 3:49 pmONT-PWM

7h 44m1 stop

4:40 pm - 10:31 pmPWM-ONT

8h 51m1 stop

$469United Airlines

Find Deal

Sun, Nov 16 - Wed, Nov 19

10:25 pm - 4:07 pmONT-PWM

14h 42m2 stops

1:25 pm - 7:42 pmPWM-ONT

9h 17m1 stop

$474Delta

Find Deal

Sun, Nov 16 - Wed, Nov 19

6:10 am - 11:59 pmONT-PWM

14h 49m2 stops

5:43 am - 4:01 pmPWM-ONT

13h 18m2 stops

$555American Airlines

Find Deal

Mon, Nov 17 - Fri, Nov 21

10:34 pm - 9:36 amONT-PWM

8h 02m1 stop

7:02 am - 7:39 pmPWM-ONT

15h 37m1 stop

$1,076American Airlines

Find Deal

Fri, Nov 28 - Fri, Dec 5

United Airlines flights from Ontario to Portland, Maine

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

United Airlines

Apr 14

ONT6:53 pmOntario

12h 55m

2 stops

PWM10:48 amPortland

Apr 15

PWM4:48 pmPortland

8h 38m

1 stop

ONT10:26 pmOntario

$402

Find similar

United Airlines

Apr 7

ONT5:00 amOntario

13h 27m

2 stops

PWM9:27 pmPortland

Apr 8

PWM11:17 amPortland

14h 49m

2 stops

ONT11:06 pmOntario

$458

Find similar

United Airlines

Nov 16

ONT5:05 amOntario

7h 44m

1 stop

PWM3:49 pmPortland

Nov 19

PWM4:40 pmPortland

8h 51m

1 stop

ONT10:31 pmOntario

$469

Find similar

Delta flights from Ontario to Portland, Maine

Our best Delta deals on Ontario to Portland, Maine flight tickets

Delta

Apr 14

ONT7:00 amOntario

13h 59m

2 stops

PWM11:59 pmPortland

Apr 15

PWM6:30 amPortland

14h 45m

2 stops

ONT6:15 pmOntario

$378

Find similar

Delta

Dec 24

ONT11:15 amOntario

8h 28m

1 stop

PWM10:43 pmPortland

Jan 8

PWM5:30 amPortland

9h 24m

1 stop

ONT11:54 amOntario

$408

Find similar

Delta

Dec 24

ONT11:15 amOntario

8h 28m

1 stop

PWM10:43 pmPortland

Jan 6

PWM5:30 amPortland

9h 24m

1 stop

ONT11:54 amOntario

$443

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 4/14

7:00 am-11:59 pm

2 stops13h 59m

Portland

Wed 4/15

6:30 am-6:15 pm

2 stops14h 45m

$378

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 4/14

6:53 pm-10:48 am

2 stops12h 55m

Portland

Wed 4/15

4:48 pm-10:26 pm

1 stop8h 38m

$402

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Wed 12/24

11:15 am-10:43 pm

1 stop8h 28m

Portland

Thu 1/8

5:30 am-11:54 am

1 stop9h 24m

$408

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Fri 5/1

11:25 pm-1:23 pm

1 stop10h 58m

Portland

Sun 5/10

2:18 pm-10:09 pm

1 stop10h 51m

$418

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Wed 12/24

11:15 am-10:43 pm

1 stop8h 28m

Portland

Tue 1/6

5:30 am-11:54 am

1 stop9h 24m

$443

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 4/7

5:00 am-9:27 pm

2 stops13h 27m

Portland

Wed 4/8

11:17 am-11:06 pm

2 stops14h 49m

$458

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sun 11/16

5:05 am-3:49 pm

1 stop7h 44m

Portland

Wed 11/19

4:40 pm-10:31 pm

1 stop8h 51m

$469

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sun 11/16

10:25 pm-4:07 pm

2 stops14h 42m

Portland

Wed 11/19

1:25 pm-7:42 pm

1 stop9h 17m

$474

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Mon 11/17

6:10 am-11:59 pm

2 stops14h 49m

Portland

Fri 11/21

5:43 am-4:01 pm

2 stops13h 18m

$555

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Fri 11/28

10:34 pm-9:36 am

1 stop8h 02m

Portland

Fri 12/5

7:02 am-7:39 pm

1 stop15h 37m

$1,076

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 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 month to fly to Portland, Maine?

The cheapest month to fly to Portland, Maine from Ontario is in January. Flight prices, which tend to average around $246, are often lower during this time because this is during the off-season. If you aren’t able to travel to Portland, Maine during the month of January, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $332.

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 3% 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

Direct flights	None

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

Search flight deals

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 33m.
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 November 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 American Airlines (29% of total bookings). The next most popular airlines are United Airlines (25%), Delta (24%), and Southwest (22%).

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
American Airlines	PriceFrom $256	Free Cancellation	Rating 7.2 11,038 reviews	Search American Airlines flights
Delta	PriceFrom $287	Free Cancellation	Rating 7.9 8,002 reviews	Search Delta flights
United Airlines	PriceFrom $380	Free Cancellation	Rating 7.4 8,997 reviews	Search United Airlines flights
Southwest	PriceFrom $391	Free Cancellation	Rating 8.0 4,238 reviews	Search Southwest flights

North Conway

Boothbay Harbor

Jackson

Conway

Freeport

Lewiston

Brunswick

Bartlett

Auburn

Gorham

Intervale

Windham

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.