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Cheap flights from Ontario to Portland from $232

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 1/22. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:55 pm - 11:30 pm
YOW
-
PWM
5h 35m1 stop
United Airlines Logo
2:31 pm - 11:54 pm
PWM
-
YOW
9h 23m1 stop
$304United Airlines
Thu, Jan 29 - Fri, Jan 30
Air Canada Logo
5:55 pm - 11:30 pm
YOW
-
PWM
5h 35m1 stop
Air Canada Logo
8:40 am - 4:23 pm
PWM
-
YOW
7h 43m2 stops
$360Air Canada
Thu, Jan 29 - Fri, Jan 30
Air Canada Logo
5:55 pm - 11:30 pm
YOW
-
PWM
5h 35m1 stop
Air Canada Logo
8:40 am - 4:23 pm
PWM
-
YOW
7h 43m2 stops
$361Air Canada
Thu, Jan 29 - Fri, Jan 30
United Airlines Logo
5:00 am - 2:31 pm
YOW
-
PWM
9h 31m2 stops
United Airlines Logo
2:31 pm - 9:18 pm
PWM
-
YOW
6h 47m2 stops
$370United Airlines
Thu, Jan 29 - Fri, Jan 30
United Airlines Logo
5:00 am - 2:31 pm
YOW
-
PWM
9h 31m2 stops
United Airlines Logo
6:00 am - 3:23 pm
PWM
-
YOW
9h 23m2 stops
$371United Airlines
Thu, Jan 29 - Fri, Jan 30
American Airlines Logo
10:30 am - 9:37 pm
YYZ
-
PWM
11h 07m2 stops
American Airlines Logo
5:30 am - 4:35 pm
PWM
-
YYZ
11h 05m1 stop
$398American Airlines
Sat, Jan 31 - Sat, Feb 7
Delta Logo
6:00 am - 1:45 pm
YYZ
-
PWM
7h 45m1 stop
Delta Logo
2:35 pm - 10:56 pm
PWM
-
YYZ
8h 21m1 stop
$400Delta
Thu, Jan 8 - Mon, Jan 12
American Airlines Logo
10:30 am - 9:37 pm
YYZ
-
PWM
11h 07m2 stops
American Airlines Logo
5:30 am - 5:28 pm
PWM
-
YYZ
11h 58m2 stops
$404American Airlines
Sat, Jan 31 - Sat, Feb 7
Delta Logo
6:00 am - 1:45 pm
YYZ
-
PWM
7h 45m1 stop
Delta Logo
6:00 am - 5:53 pm
PWM
-
YYZ
11h 53m1 stop
$420Delta
Thu, Jan 8 - Mon, Jan 12
Multiple Airlines Logo
1:10 pm - 11:30 pm
YUL
-
PWM
10h 20m1 stop
Multiple Airlines Logo
6:00 am - 2:22 pm
PWM
-
YUL
8h 22m2 stops
$582Multiple Airlines
Thu, Jan 22 - Thu, Jan 29

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
Jan 29
YOW5:55 pmOttawa
5h 35m
1 stop
PWM11:30 pmPortland
Jan 30
PWM3:12 pmPortland
6h 44m
1 stop
YOW9:56 pmOttawa
$303
Find similar
United Airlines
Jan 29
YOW5:55 pmOttawa
5h 35m
1 stop
PWM11:30 pmPortland
Jan 30
PWM2:31 pmPortland
9h 23m
1 stop
YOW11:54 pmOttawa
$304
Find similar
United Airlines
Jan 29
YOW5:00 amOttawa
9h 31m
2 stops
PWM2:31 pmPortland
Jan 30
PWM6:00 amPortland
9h 23m
2 stops
YOW3:23 pmOttawa
$369
Find similar

Air Canada flights from Region of Ontario to Portland, Maine

Our best Air Canada deals on Region of Ontario to Portland, Maine flight tickets
Air Canada
Jan 29
YOW5:55 pmOttawa
5h 35m
1 stop
PWM11:30 pmPortland
Jan 30
PWM6:00 amPortland
10h 23m
2 stops
YOW4:23 pmOttawa
$359
Find similar
Air Canada
Jan 29
YOW5:55 pmOttawa
5h 35m
1 stop
PWM11:30 pmPortland
Jan 30
PWM8:40 amPortland
7h 43m
2 stops
YOW4:23 pmOttawa
$360
Find similar
Air Canada
Jan 29
YOW5:55 pmOttawa
5h 35m
1 stop
PWM11:30 pmPortland
Jan 30
PWM8:40 amPortland
7h 43m
2 stops
YOW4:23 pmOttawa
$361
Find similar

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 December 10, 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

OttawaPortland

YOW - PWM

YOWPWM

Ottawa

Thu 1/29

5:55 pm-11:30 pm

1 stop5h 35m

Portland

Fri 1/30

2:31 pm-11:54 pm

1 stop9h 23m

$304

OttawaPortland

YOW - PWM

YOWPWM

Ottawa

Thu 1/29

5:55 pm-11:30 pm

1 stop5h 35m

Portland

Fri 1/30

8:40 am-4:23 pm

2 stops7h 43m

$360

OttawaPortland

YOW - PWM

YOWPWM

Ottawa

Thu 1/29

5:55 pm-11:30 pm

1 stop5h 35m

Portland

Fri 1/30

8:40 am-4:23 pm

2 stops7h 43m

$361

OttawaPortland

YOW - PWM

YOWPWM

Ottawa

Thu 1/29

5:00 am-2:31 pm

2 stops9h 31m

Portland

Fri 1/30

2:31 pm-9:18 pm

2 stops6h 47m

$370

OttawaPortland

YOW - PWM

YOWPWM

Ottawa

Thu 1/29

5:00 am-2:31 pm

2 stops9h 31m

Portland

Fri 1/30

6:00 am-3:23 pm

2 stops9h 23m

$371

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Sat 1/31

10:30 am-9:37 pm

2 stops11h 07m

Portland

Sat 2/7

5:30 am-4:35 pm

1 stop11h 05m

$398

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Thu 1/8

6:00 am-1:45 pm

1 stop7h 45m

Portland

Mon 1/12

2:35 pm-10:56 pm

1 stop8h 21m

$400

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Sat 1/31

10:30 am-9:37 pm

2 stops11h 07m

Portland

Sat 2/7

5:30 am-5:28 pm

2 stops11h 58m

$404

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Thu 1/8

6:00 am-1:45 pm

1 stop7h 45m

Portland

Mon 1/12

6:00 am-5:53 pm

1 stop11h 53m

$420

MontrealPortland

YUL - PWM

YULPWM

Montreal Pierre Elliott Trudeau Intl

Thu 1/22

1:10 pm-11:30 pm

1 stop10h 20m

Portland

Thu 1/29

6:00 am-2:22 pm

2 stops8h 22m

$582

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

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 Region of Ontario is on a Friday. momondo users have found tickets for Friday departures for as low as $268. 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 Region of Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,023.

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

In the morning is the cheapest time of day to fly from Region of Ontario to Portland, Maine when you can find flight prices for as low as $368. Flying to Portland, Maine in the morning is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the afternoon because they tend to be around $478. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

5h 04m

Direct flights

None
The fastest flight from Region of Ontario to Portland, Maine takes 5h 04m
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
Bartlett
Brunswick
Auburn
Gorham
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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