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Cheap flights from Ontario to Portland from $149

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 10/1. 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
0 bags

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Find the cheapest flights from Ontario to Portland (ONT-PWM)

Cheap round-trip flights

JetBlue Logo
10:56 pm - 1:21 pmONT-PWM
11h 25m1 stop
JetBlue Logo
2:17 pm - 9:29 pmPWM-ONT
10h 12m1 stop
$295JetBlue
Find Deal
lun., sep. 15 - vie., sep. 19
Delta Logo
11:36 am - 10:19 pmONT-PWM
7h 43m1 stop
Delta Logo
11:41 am - 10:41 pmPWM-ONT
14h 00m2 stops
$302Delta
Find Deal
sáb., oct. 18 - sáb., oct. 25
Delta Logo
5:50 pm - 10:36 amONT-PWM
13h 46m2 stops
Delta Logo
11:41 am - 10:41 pmPWM-ONT
14h 00m2 stops
$307Delta
Find Deal
sáb., oct. 18 - sáb., oct. 25
United Airlines Logo
6:50 pm - 9:24 amONT-PWM
11h 34m2 stops
United Airlines Logo
4:56 pm - 10:30 pmPWM-ONT
8h 34m1 stop
$350United Airlines
Find Deal
lun., sep. 15 - vie., sep. 19
United Airlines Logo
7:00 am - 11:30 pmONT-PWM
13h 30m2 stops
United Airlines Logo
9:00 am - 10:26 pmPWM-ONT
16h 26m2 stops
$361United Airlines
Find Deal
sáb., feb. 7 - mié., feb. 11
JetBlue Logo
10:56 pm - 1:22 pmONT-PWM
11h 26m1 stop
JetBlue Logo
2:17 pm - 9:29 pmPWM-ONT
10h 12m1 stop
$363JetBlue
Find Deal
vie., oct. 3 - mié., oct. 8
JetBlue Logo
10:56 pm - 1:22 pmONT-PWM
11h 26m1 stop
JetBlue Logo
2:17 pm - 9:29 pmPWM-ONT
10h 12m1 stop
$364JetBlue
Find Deal
sáb., sep. 27 - sáb., oct. 4
Southwest Logo
12:05 pm - 10:25 pmONT-PWM
7h 20m1 stop
Southwest Logo
10:45 am - 6:30 pmPWM-ONT
10h 45m1 stop
$449Southwest
Find Deal
sáb., oct. 18 - sáb., oct. 25
American Airlines Logo
6:10 am - 5:47 pmONT-PWM
8h 37m1 stop
American Airlines Logo
1:57 pm - 9:24 pmPWM-ONT
10h 27m1 stop
$615American Airlines
Find Deal
jue., sep. 18 - mar., sep. 23
American Airlines Logo
8:15 am - 11:45 pmONT-PWM
12h 30m2 stops
American Airlines Logo
6:00 am - 1:19 pmPWM-ONT
10h 19m2 stops
$845American Airlines
Find Deal
mié., sep. 10 - dom., sep. 14

JetBlue flights from Ontario to Portland, Maine

Our best JetBlue deals on Ontario to Portland, Maine flight tickets
JetBlue
Sep 15
ONT10:56 pmOntario
11h 25m
1 stop
PWM1:21 pmPortland
Sep 19
PWM2:17 pmPortland
10h 12m
1 stop
ONT9:29 pmOntario
$295
Find similar
JetBlue
Oct 3
ONT10:56 pmOntario
11h 26m
1 stop
PWM1:22 pmPortland
Oct 8
PWM2:17 pmPortland
10h 12m
1 stop
ONT9:29 pmOntario
$363
Find similar
JetBlue
Sep 27
ONT10:56 pmOntario
11h 26m
1 stop
PWM1:22 pmPortland
Oct 4
PWM2:17 pmPortland
10h 12m
1 stop
ONT9:29 pmOntario
$364
Find similar

Delta flights from Ontario to Portland, Maine

Our best Delta deals on Ontario to Portland, Maine flight tickets
Delta
Oct 18
ONT11:36 amOntario
7h 43m
1 stop
PWM10:19 pmPortland
Oct 25
PWM11:41 amPortland
14h 00m
2 stops
ONT10:41 pmOntario
$302
Find similar
Delta
Oct 18
ONT5:50 pmOntario
13h 46m
2 stops
PWM10:36 amPortland
Oct 25
PWM11:41 amPortland
14h 00m
2 stops
ONT10:41 pmOntario
$307
Find similar
Delta
Sep 3
ONT11:45 amOntario
9h 18m
1 stop
PWM12:03 amPortland
Sep 9
PWM1:34 pmPortland
8h 37m
1 stop
ONT7:11 pmOntario
$365
Find similar

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 agosto 28, 2025.
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

OntarioPortland

ONT - PWM

ONTPWM

Ontario

lun. 9/15

10:56 pm-1:21 pm

1 stop11h 25m

Portland

vie. 9/19

2:17 pm-9:29 pm

1 stop10h 12m

$295

OntarioPortland

ONT - PWM

ONTPWM

Ontario

sáb. 10/18

11:36 am-10:19 pm

1 stop7h 43m

Portland

sáb. 10/25

11:41 am-10:41 pm

2 stops14h 00m

$302

OntarioPortland

ONT - PWM

ONTPWM

Ontario

sáb. 10/18

5:50 pm-10:36 am

2 stops13h 46m

Portland

sáb. 10/25

11:41 am-10:41 pm

2 stops14h 00m

$307

OntarioPortland

ONT - PWM

ONTPWM

Ontario

lun. 9/15

6:50 pm-9:24 am

2 stops11h 34m

Portland

vie. 9/19

4:56 pm-10:30 pm

1 stop8h 34m

$350

OntarioPortland

ONT - PWM

ONTPWM

Ontario

sáb. 2/7

7:00 am-11:30 pm

2 stops13h 30m

Portland

mié. 2/11

9:00 am-10:26 pm

2 stops16h 26m

$361

OntarioPortland

ONT - PWM

ONTPWM

Ontario

vie. 10/3

10:56 pm-1:22 pm

1 stop11h 26m

Portland

mié. 10/8

2:17 pm-9:29 pm

1 stop10h 12m

$363

OntarioPortland

ONT - PWM

ONTPWM

Ontario

sáb. 9/27

10:56 pm-1:22 pm

1 stop11h 26m

Portland

sáb. 10/4

2:17 pm-9:29 pm

1 stop10h 12m

$364

OntarioPortland

ONT - PWM

ONTPWM

Ontario

sáb. 10/18

12:05 pm-10:25 pm

1 stop7h 20m

Portland

sáb. 10/25

10:45 am-6:30 pm

1 stop10h 45m

$449

OntarioPortland

ONT - PWM

ONTPWM

Ontario

jue. 9/18

6:10 am-5:47 pm

1 stop8h 37m

Portland

mar. 9/23

1:57 pm-9:24 pm

1 stop10h 27m

$615

OntarioPortland

ONT - PWM

ONTPWM

Ontario

mié. 9/10

8:15 am-11:45 pm

2 stops12h 30m

Portland

dom. 9/14

6:00 am-1:19 pm

2 stops10h 19m

$845

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 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 18% 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 20m.

  • 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
DeltaPriceFrom $148Free CancellationRating
7.9
7,977 reviews
Search Delta flights
American AirlinesPriceFrom $266Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
JetBluePriceFrom $331Free CancellationRating
7.2
2,920 reviews
Search JetBlue flights
United AirlinesPriceFrom $356Free CancellationRating
7.4
8,944 reviews
Search United Airlines flights
SouthwestPriceFrom $391Free CancellationRating
8.0
4,242 reviews
Search Southwest 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
Conway
Freeport
Lewiston
Bartlett
Gorham
Brunswick
Auburn
Intervale
Windham
Bath
Oxford
Georgetown
Tamworth
Falmouth

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.

An easier way to manage your Portland, Maine trip

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