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Cheap flights from Portland, ME to Ontario from C$ 252

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/4. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
21 Apr — 28 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portland to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Portland to Ontario
Explore the most affordable flight options available from Portland to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 March 2026.

Wed 8/43:39 p.m.
PWM
-
YYZ
1 stop7h 32m
American Airlines
Wed 15/47:25 p.m.
YYZ
-
PWM
1 stop14h 29m
American Airlines
Deal found 18/3C$ 528
Sat 11/43:40 p.m.
PWM
-
YYZ
1 stop18h 39m
American Airlines
Tue 14/47:25 p.m.
YYZ
-
PWM
1 stop14h 29m
American Airlines
Deal found 18/3C$ 595
Fri 12/69:52 a.m.
PWM
-
YYZ
1 stop10h 13m
Multiple Airlines
Sun 14/64:50 p.m.
YYZ
-
PWM
1 stop16h 22m
Multiple Airlines
Deal found 18/3C$ 599
Wed 6/510:24 a.m.
PWM
-
YYZ
1 stop8h 21m
American Airlines
Sat 9/53:15 p.m.
YYZ
-
PWM
1 stop18h 39m
American Airlines
Deal found 18/3C$ 617
Thu 30/43:39 p.m.
PWM
-
YYZ
1 stop7h 32m
American Airlines
Sun 3/57:15 a.m.
YYZ
-
PWM
1 stop9h 08m
American Airlines
Deal found 17/3C$ 631
Fri 1/510:24 a.m.
PWM
-
YYZ
1 stop12h 47m
American Airlines
Fri 8/57:25 p.m.
YYZ
-
PWM
1 stop15h 29m
American Airlines
Deal found 17/3C$ 643
Sun 12/410:24 a.m.
PWM
-
YYZ
1 stop8h 21m
American Airlines
Sun 19/43:24 p.m.
YYZ
-
PWM
1 stop18h 30m
American Airlines
Deal found 19/3C$ 661
Thu 23/410:24 a.m.
PWM
-
YYZ
1 stop8h 21m
American Airlines
Sun 26/43:24 p.m.
YYZ
-
PWM
1 stop18h 30m
American Airlines
Deal found 19/3C$ 674
Fri 22/59:29 a.m.
PWM
-
YYZ
1 stop13h 36m
American Airlines
Mon 25/57:25 p.m.
YYZ
-
PWM
1 stop13h 28m
American Airlines
Deal found 21/3C$ 687
Thu 21/55:17 p.m.
PWM
-
YUL
2 stops16h 33m
American Airlines
Sun 24/510:36 a.m.
YUL
-
PWM
1 stop26h 04m
American Airlines
Deal found 17/3C$ 749
Tue 5/511:35 a.m.
PWM
-
YUL
1 stop7h 16m
Delta
Tue 12/52:29 p.m.
YUL
-
PWM
1 stop8h 49m
Delta
Deal found 21/3C$ 763
Mon 15/61:35 p.m.
PWM
-
YUL
1 stop20h 15m
American Airlines
Wed 17/610:30 a.m.
YUL
-
PWM
1 stop22h 52m
American Airlines
Deal found 17/3C$ 768

Find flight deals from Portland to Ontario

Keep the following information in mind while searching for Portland to Ontario flight deals. Data was last updated 22 March 2026.

Round-trip from

C$ 528

One-way from

C$ 252
American Airlines
  • American Airlines
  • 8/4-15/4
  • 2 total stops
  • 22h 01m total
  • Portland to Ontario
Search Deals
American Airlines
  • American Airlines
  • 13/4
  • 1 total stop
  • 7h 32m total
  • Portland to Ontario
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Ontario 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, Cheapflights users made 629,999 searches. Data last updated 22 March 2026.
Use the filters below to find and compare flights from Portland to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 12/6

9:52 a.m.-11:35 p.m.

1 stop13h 43m

Toronto Pearson Intl

Sun 14/6

7:45 a.m.-7:16 p.m.

2 stops11h 31m

C$ 680

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sun 31/5

5:15 a.m.-10:04 a.m.

1 stop4h 49m

Toronto Pearson Intl

Wed 3/6

2:30 p.m.-11:51 p.m.

1 stop9h 21m

C$ 741

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Mon 15/6

1:35 p.m.-9:50 a.m.

1 stop20h 15m

Montreal Pierre Elliott Trudeau Intl

Wed 17/6

10:30 a.m.-9:22 a.m.

1 stop22h 52m

C$ 768

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 12/6

6:19 p.m.-11:59 p.m.

1 stop5h 40m

Toronto Pearson Intl

Sun 14/6

12:45 p.m.-11:51 p.m.

1 stop11h 06m

C$ 770

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 18/6

6:00 a.m.-11:43 a.m.

1 stop5h 43m

Toronto Pearson Intl

Sun 21/6

12:45 p.m.-7:27 p.m.

1 stop6h 42m

C$ 770

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 25/6

6:25 p.m.-11:59 p.m.

1 stop5h 34m

Toronto Pearson Intl

Fri 26/6

7:30 a.m.-1:25 p.m.

1 stop5h 55m

C$ 770

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Thu 25/6

6:00 a.m.-1:09 p.m.

1 stop7h 09m

Montreal Pierre Elliott Trudeau Intl

Sat 4/7

11:23 a.m.-6:29 p.m.

1 stop7h 06m

C$ 772

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Fri 1/5

3:39 p.m.-10:06 p.m.

1 stop6h 27m

Montreal Pierre Elliott Trudeau Intl

Fri 8/5

2:20 p.m.-7:04 p.m.

1 stop4h 44m

C$ 792

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Mon 13/4

3:22 p.m.-10:06 p.m.

1 stop6h 44m

Montreal Pierre Elliott Trudeau Intl

Mon 20/4

6:10 a.m.-9:40 p.m.

1 stop15h 30m

C$ 792

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Thu 21/5

1:35 p.m.-9:50 a.m.

1 stop20h 15m

Montreal Pierre Elliott Trudeau Intl

Sun 24/5

10:36 a.m.-12:40 p.m.

1 stop26h 04m

C$ 816

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/3

Showing 1-10 of 35 resultsSorted by cheapest first
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Best time to book a flight from Portland to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Ontario

What is the cheapest month to book a flight from Portland, Maine to Region of Ontario?

Currently, August is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of C$ 171). Flying from Portland, Maine to Region of Ontario in December is currently the most expensive (average of C$ 298). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Portland to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Portland to Ontario?

    If you book a flight to Ontario from Portland, you will be flying from Portland, which is the city’s only airport. Portland (PWM) is located 4.7 km from the centre of Portland.

  • How long is the flight from Portland, Maine to Region of Ontario?

    United Airlines and American Airlines can get you from Portland, Maine to Region of Ontario in just under 4h 49m. Your travel time can differ by up to 15h 26m. The distance from Portland, Maine to Region of Ontario is about 748 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Portland to Ontario that include hotel bookings?

    Yes. In addition to deals on Portland to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Ontario.

  • Can I find deals for business class flights from Portland to Ontario?

    Yes. Cheapflights offers flight deals from Portland to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland, Maine to Region of Ontario?

    Currently, August is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of C$ 171). Flying from Portland, Maine to Region of Ontario in December is currently the most expensive (average of C$ 298). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Users can book flights with no change fees policies with our dedicated filters. Book flights from Portland to Ontario flexibly with Cheapflights today.

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