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Cheap flights from Ontario to Portland from $202

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 4/27. 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

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Find the cheapest flights from Ontario to Portland

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:30 pm - 11:51 pm
YOW
-
PWM
4h 21m
1 stop
United Airlines Logo
7:16 pm - 11:54 pm
PWM
-
YOW
4h 38m
1 stop
$338United Airlines
Tue, Jun 2 - Sat, Jun 6
United Airlines Logo
2:52 pm - 11:51 pm
YOW
-
PWM
8h 59m
1 stop
United Airlines Logo
5:15 am - 10:03 am
PWM
-
YOW
4h 48m
1 stop
$344United Airlines
Tue, Jun 2 - Sat, Jun 6
United Airlines Logo
7:30 pm - 11:51 pm
YOW
-
PWM
4h 21m
1 stop
United Airlines Logo
5:15 am - 6:48 pm
PWM
-
YOW
13h 33m
1 stop
$345United Airlines
Tue, Jun 2 - Sat, Jun 6
American Airlines Logo
7:25 pm - 9:54 am
YYZ
-
PWM
14h 29m
1 stop
American Airlines Logo
3:39 pm - 11:11 pm
PWM
-
YYZ
7h 32m
1 stop
$350American Airlines
Mon, Apr 20 - Mon, Apr 27
United Airlines Logo
10:00 am - 2:34 pm
YOW
-
PWM
4h 34m
1 stop
United Airlines Logo
5:15 am - 10:03 am
PWM
-
YOW
4h 48m
1 stop
$358United Airlines
Tue, Jun 2 - Sat, Jun 6
American Airlines Logo
10:31 am - 12:24 pm
YUL
-
PWM
25h 53m
1 stop
American Airlines Logo
1:14 pm - 9:50 am
PWM
-
YUL
20h 36m
1 stop
$373American Airlines
Fri, Aug 21 - Fri, Aug 28
Delta Logo
12:09 pm - 12:46 am
YYZ
-
PWM
12h 37m
1 stop
Delta Logo
2:51 pm - 11:18 am
PWM
-
YYZ
20h 27m
2 stops
$374Delta
Tue, Apr 21 - Mon, Apr 27
American Airlines Logo
7:25 pm - 8:53 am
YYZ
-
PWM
13h 28m
1 stop
American Airlines Logo
1:35 pm - 11:05 pm
PWM
-
YYZ
9h 30m
1 stop
$378American Airlines
Tue, Jun 9 - Thu, Jun 18
American Airlines Logo
7:15 am - 3:07 pm
YYZ
-
PWM
7h 52m
1 stop
American Airlines Logo
3:40 pm - 10:19 am
PWM
-
YYZ
18h 39m
1 stop
$381American Airlines
Sat, Apr 18 - Sat, Apr 25
American Airlines Logo
7:25 pm - 9:54 am
YYZ
-
PWM
14h 29m
1 stop
American Airlines Logo
3:39 pm - 11:11 pm
PWM
-
YYZ
7h 32m
1 stop
$382American Airlines
Mon, Apr 20 - Mon, Apr 27

United Airlines flights from Region of Ontario to Portland, Maine

Our best United Airlines deals on Region of Ontario to Portland, Maine flight tickets
United Airlines
Jun 2
YOW7:30 pmOttawa
4h 21m
1 stop
PWM11:51 pmPortland
Jun 6
PWM7:16 pmPortland
4h 38m
1 stop
YOW11:54 pmOttawa
$338
United Airlines
Jun 2
YOW2:52 pmOttawa
8h 59m
1 stop
PWM11:51 pmPortland
Jun 6
PWM5:15 amPortland
4h 48m
1 stop
YOW10:03 amOttawa
$344
United Airlines
Jun 2
YOW7:30 pmOttawa
4h 21m
1 stop
PWM11:51 pmPortland
Jun 6
PWM5:15 amPortland
13h 33m
1 stop
YOW6:48 pmOttawa
$345

American Airlines flights from Region of Ontario to Portland, Maine

Our best American Airlines deals on Region of Ontario to Portland, Maine flight tickets
American Airlines
Apr 20
YYZ7:25 pmToronto Pearson Intl
14h 29m
1 stop
PWM9:54 amPortland
Apr 27
PWM3:39 pmPortland
7h 32m
1 stop
YYZ11:11 pmToronto Pearson Intl
$350
American Airlines
Aug 21
YUL10:31 amMontreal Pierre Elliott Trudeau Intl
25h 53m
1 stop
PWM12:24 pmPortland
Aug 28
PWM1:14 pmPortland
20h 36m
1 stop
YUL9:50 amMontreal Pierre Elliott Trudeau Intl
$373
American Airlines
Jun 9
YYZ7:25 pmToronto Pearson Intl
13h 28m
1 stop
PWM8:53 amPortland
Jun 18
PWM1:35 pmPortland
9h 30m
1 stop
YYZ11:05 pmToronto Pearson Intl
$378

momondo Fare Finder

 
Customize your flight search to find flights from Region of 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 March 14, 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
Quickest round-trip

OttawaPortland

YOW - PWM

YOWPWM

Ottawa

Tue 6/2

7:30 pm-11:51 pm

1 stop4h 21m

Portland

Sat 6/6

7:16 pm-11:54 pm

1 stop4h 38m

$338

OttawaPortland

YOW - PWM

YOWPWM

Ottawa

Tue 6/2

2:52 pm-11:51 pm

1 stop8h 59m

Portland

Sat 6/6

5:15 am-10:03 am

1 stop4h 48m

$344

OttawaPortland

YOW - PWM

YOWPWM

Ottawa

Tue 6/2

7:30 pm-11:51 pm

1 stop4h 21m

Portland

Sat 6/6

5:15 am-6:48 pm

1 stop13h 33m

$345

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Mon 4/20

7:25 pm-9:54 am

1 stop14h 29m

Portland

Mon 4/27

3:39 pm-11:11 pm

1 stop7h 32m

$350

OttawaPortland

YOW - PWM

YOWPWM

Ottawa

Tue 6/2

10:00 am-2:34 pm

1 stop4h 34m

Portland

Sat 6/6

5:15 am-10:03 am

1 stop4h 48m

$358

MontrealPortland

YUL - PWM

YULPWM

Montreal Pierre Elliott Trudeau Intl

Fri 8/21

10:31 am-12:24 pm

1 stop25h 53m

Portland

Fri 8/28

1:14 pm-9:50 am

1 stop20h 36m

$373

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Tue 4/21

12:09 pm-12:46 am

1 stop12h 37m

Portland

Mon 4/27

2:51 pm-11:18 am

2 stops20h 27m

$374

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Tue 6/9

7:25 pm-8:53 am

1 stop13h 28m

Portland

Thu 6/18

1:35 pm-11:05 pm

1 stop9h 30m

$378

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Sat 4/18

7:15 am-3:07 pm

1 stop7h 52m

Portland

Sat 4/25

3:40 pm-10:19 am

1 stop18h 39m

$381

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Mon 4/20

7:25 pm-9:54 am

1 stop14h 29m

Portland

Mon 4/27

3:39 pm-11:11 pm

1 stop7h 32m

$382

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 Region of 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

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

You could potentially save up to 60% on your flight if you consider stops on a Region of Ontario to Portland, Maine flight.

Cheap Region of Ontario to Portland, Maine flight deals and tips

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

Fastest flight time

4h 30m

Direct flights

None
The fastest flight from Region of Ontario to Portland, Maine takes 4h 30m
There are no direct flights from Region of Ontario to Portland, Maine. There are no popular flight routes from Region of Ontario to Portland, Maine.
Search flight deals

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

    Prices for flights from Ontario to Portland Airport were last updated today.

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

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

    The required travel and health documents for your Portland Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portland Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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
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?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Portland from Ontario.

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

Yes. momondo enables you to select and highlight flights to Portland from Ontario with this policy.

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

momondo helps you find the best flight between Ontario and Portland 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 Ontario to Portland right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Portland from Ontario. 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.

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