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Cheap flights from Ontario to Portland from $133

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Portland departing on 8/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Portland

Cheap round-trip flights

Enter your travel dates to find the best prices.
JetBlue Logo
11:59 pm - 12:30 pm
ONT
-
PWM
9h 31m
1 stop
JetBlue Logo
2:40 pm - 10:38 pm
PWM
-
ONT
10h 58m
1 stop
$265JetBlue
Mon, Aug 31 - Thu, Sep 3
JetBlue Logo
11:59 pm - 1:45 pm
ONT
-
PWM
10h 46m
1 stop
JetBlue Logo
1:25 pm - 10:37 pm
PWM
-
ONT
12h 12m
1 stop
$296JetBlue
Tue, Aug 18 - Tue, Aug 25
American Airlines Logo
7:05 am - 10:48 pm
ONT
-
PWM
12h 43m
2 stops
American Airlines Logo
8:00 am - 1:31 pm
PWM
-
ONT
8h 31m
1 stop
$302American Airlines
Sat, Aug 8 - Tue, Sep 1
American Airlines Logo
7:05 am - 10:48 pm
ONT
-
PWM
12h 43m
2 stops
American Airlines Logo
8:50 am - 6:47 pm
PWM
-
ONT
12h 57m
2 stops
$307American Airlines
Sat, Aug 8 - Tue, Sep 1
American Airlines Logo
6:00 am - 6:52 pm
ONT
-
PWM
9h 52m
1 stop
American Airlines Logo
8:00 am - 1:31 pm
PWM
-
ONT
8h 31m
1 stop
$318American Airlines
Tue, Aug 11 - Wed, Aug 19
JetBlue Logo
11:59 pm - 12:30 pm
ONT
-
PWM
9h 31m
1 stop
JetBlue Logo
1:25 pm - 10:37 pm
PWM
-
ONT
12h 12m
1 stop
$327JetBlue
Mon, Aug 17 - Tue, Aug 25
American Airlines Logo
10:29 am - 11:41 pm
ONT
-
PWM
10h 12m
2 stops
American Airlines Logo
7:28 am - 6:15 pm
PWM
-
ONT
13h 47m
2 stops
$329American Airlines
Tue, Aug 11 - Wed, Aug 19
American Airlines Logo
11:59 pm - 12:40 pm
ONT
-
PWM
9h 41m
2 stops
American Airlines Logo
5:30 am - 1:31 pm
PWM
-
ONT
11h 01m
2 stops
$342American Airlines
Tue, Aug 4 - Wed, Aug 12
JetBlue Logo
11:59 pm - 1:45 pm
ONT
-
PWM
10h 46m
1 stop
JetBlue Logo
2:40 pm - 9:59 pm
PWM
-
ONT
10h 19m
1 stop
$346JetBlue
Wed, Aug 5 - Sat, Aug 22
Delta Logo
12:17 pm - 11:30 pm
ONT
-
PWM
8h 13m
1 stop
Delta Logo
6:00 am - 11:07 am
PWM
-
ONT
8h 07m
1 stop
$351Delta
Tue, Sep 22 - Wed, Sep 30

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Delta flights from Ontario to Portland, Maine

Our best Delta deals on Ontario to Portland, Maine flight tickets
Delta
Sep 22
ONT12:17 pmOntario
8h 13m
1 stop
PWM11:30 pmPortland
Oct 3
PWM6:00 amPortland
8h 07m
1 stop
ONT11:07 amOntario
$351
Delta
Sep 20
ONT10:00 pmOntario
14h 39m
2 stops
PWM3:39 pmPortland
Oct 3
PWM6:00 amPortland
8h 07m
1 stop
ONT11:07 amOntario
$356
Delta
Sep 23
ONT12:17 pmOntario
8h 13m
1 stop
PWM11:30 pmPortland
Oct 3
PWM6:00 amPortland
8h 07m
1 stop
ONT11:07 amOntario
$366

Southwest flights from Ontario to Portland, Maine

Our best Southwest deals on Ontario to Portland, Maine flight tickets
Southwest
Aug 18
ONT9:40 amOntario
9h 25m
2 stops
PWM10:05 pmPortland
Aug 22
PWM5:40 amPortland
11h 35m
2 stops
ONT2:15 pmOntario
$355
Southwest
Sep 19
ONT7:05 amOntario
10h 55m
2 stops
PWM9:00 pmPortland
Oct 3
PWM9:25 amPortland
9h 15m
2 stops
ONT3:40 pmOntario
$391
Southwest
Sep 23
ONT8:35 amOntario
9h 35m
2 stops
PWM9:10 pmPortland
Oct 1
PWM6:30 amPortland
10h 55m
1 stop
ONT2:25 pmOntario
$392

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Portland, Maine that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated June 27, 2026.
Use the filters below to find and compare flights from Ontario to Portland, Maine that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Mon 8/31

11:59 pm-12:30 pm

1 stop9h 31m

Portland

Thu 9/3

2:40 pm-10:38 pm

1 stop10h 58m

$265

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 8/18

11:59 pm-1:45 pm

1 stop10h 46m

Portland

Tue 8/25

1:25 pm-10:37 pm

1 stop12h 12m

$296

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 8/8

7:05 am-10:48 pm

2 stops12h 43m

Portland

Tue 9/1

8:00 am-1:31 pm

1 stop8h 31m

$302

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 8/8

7:05 am-10:48 pm

2 stops12h 43m

Portland

Tue 9/1

8:50 am-6:47 pm

2 stops12h 57m

$307

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 8/11

6:00 am-6:52 pm

1 stop9h 52m

Portland

Wed 8/19

8:00 am-1:31 pm

1 stop8h 31m

$318

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Mon 8/17

11:59 pm-12:30 pm

1 stop9h 31m

Portland

Tue 8/25

1:25 pm-10:37 pm

1 stop12h 12m

$327

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 8/11

10:29 am-11:41 pm

2 stops10h 12m

Portland

Wed 8/19

7:28 am-6:15 pm

2 stops13h 47m

$329

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 8/4

11:59 pm-12:40 pm

2 stops9h 41m

Portland

Wed 8/12

5:30 am-1:31 pm

2 stops11h 01m

$342

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Wed 8/5

11:59 pm-1:45 pm

1 stop10h 46m

Portland

Sat 8/22

2:40 pm-9:59 pm

1 stop10h 19m

$346
Quickest round-trip

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 9/22

12:17 pm-11:30 pm

1 stop8h 13m

Portland

Wed 9/30

6:00 am-11:07 am

1 stop8h 07m

$351

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Portland from

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

What is the typical price of a round-trip flight between Ontario and Portland, Maine?

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 $0, 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 October is also cheap. Prices for this month can be found on momondo for an average of $397.

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 49m

Direct flights

None
The fastest flight from Ontario to Portland, Maine takes 7h 49m
There are no direct flights from Ontario to Portland, Maine. There are no popular flight routes from Ontario to Portland, Maine.
Search flight deals

Frequently asked questions about flying from Ontario to Portland, Maine

  • 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 49m.

  • 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?

  • 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?

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 AirlinesPriceFrom $256Free CancellationRating
7.1
11,777 reviews
Search American Airlines flights
SouthwestPriceFrom $383Free CancellationRating
7.9
4,246 reviews
Search Southwest flights
United AirlinesPriceFrom $396Free CancellationRating
7.4
9,896 reviews
Search United Airlines flights

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
North Conway
Boothbay Harbor
Jackson
Lewiston
Brunswick
Freeport
Conway
Bartlett
Gorham
Auburn
Windham
Intervale
Bath
Oxford
Falmouth
Georgetown
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.

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