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Cheap flights from Portland, ME to Ontario from C$ 273

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 29/5. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
3 Jun — 10 Jun1
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 4 May 2026.

Tue 30/65:41 p.m.
PWM
-
YYZ
1 stop15h 29m
Delta
Wed 15/76:04 a.m.
YYZ
-
PWM
1 stop18h 55m
Delta
Deal found 29/4C$ 575
Fri 29/59:29 a.m.
PWM
-
YYZ
1 stop9h 16m
American Airlines
Sun 31/57:25 p.m.
YYZ
-
PWM
1 stop13h 28m
American Airlines
Deal found 3/5C$ 583
Sun 24/510:58 a.m.
PWM
-
YYZ
1 stop7h 47m
American Airlines
Mon 1/67:25 p.m.
YYZ
-
PWM
1 stop13h 28m
American Airlines
Deal found 29/4C$ 584
Thu 2/710:01 a.m.
PWM
-
YYZ
1 stop8h 44m
American Airlines
Wed 15/77:25 p.m.
YYZ
-
PWM
1 stop13h 57m
American Airlines
Deal found 29/4C$ 587
Sat 30/510:24 a.m.
PWM
-
YUL
1 stop23h 32m
American Airlines
Sat 6/610:30 a.m.
YUL
-
PWM
1 stop26h 09m
American Airlines
Deal found 2/5C$ 610
Fri 17/76:25 a.m.
PWM
-
YUL
1 stop12h 29m
Delta
Mon 27/77:44 p.m.
YUL
-
PWM
1 stop14h 37m
Delta
Deal found 30/4C$ 612
Wed 10/611:07 a.m.
PWM
-
YYZ
1 stop8h 58m
Multiple Airlines
Sun 14/69:50 a.m.
YYZ
-
PWM
1 stop23h 22m
Multiple Airlines
Deal found 30/4C$ 624
Fri 12/61:36 p.m.
PWM
-
YYZ
1 stop9h 29m
American Airlines
Sun 14/611:01 a.m.
YYZ
-
PWM
1 stop12h 58m
American Airlines
Deal found 2/5C$ 625
Mon 1/61:35 p.m.
PWM
-
YUL
1 stop20h 15m
American Airlines
Mon 8/610:30 a.m.
YUL
-
PWM
1 stop22h 23m
American Airlines
Deal found 1/5C$ 635
Thu 4/61:36 p.m.
PWM
-
YYZ
1 stop9h 29m
American Airlines
Sun 7/67:25 p.m.
YYZ
-
PWM
1 stop13h 28m
American Airlines
Deal found 3/5C$ 636
Fri 26/61:36 p.m.
PWM
-
YYZ
1 stop9h 29m
American Airlines
Sun 28/67:25 p.m.
YYZ
-
PWM
1 stop13h 57m
American Airlines
Deal found 3/5C$ 639
Sat 4/76:25 a.m.
PWM
-
YYZ
2 stops10h 59m
Delta
Wed 15/76:04 a.m.
YYZ
-
PWM
1 stop18h 55m
Delta
Deal found 28/4C$ 643

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 4 May 2026.

Round-trip from

C$ 575

One-way from

C$ 273
Delta
  • Delta
  • 30/6-15/7
  • 2 total stops
  • 34h 24m total
  • Portland to Ontario
Search Deals
American Airlines
  • American Airlines
  • 29/5
  • 1 total stop
  • 20h 15m 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 4 May 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

Sun 5/7

6:00 a.m.-4:15 p.m.

1 stop10h 15m

Toronto Pearson Intl

Wed 15/7

6:04 a.m.-12:59 a.m.

1 stop18h 55m

C$ 575

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Tue 2/6

1:34 p.m.-9:50 a.m.

1 stop20h 16m

Montreal Pierre Elliott Trudeau Intl

Tue 9/6

10:30 a.m.-12:39 p.m.

1 stop26h 09m

C$ 610

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Wed 22/7

6:25 a.m.-6:54 p.m.

1 stop12h 29m

Montreal Pierre Elliott Trudeau Intl

Thu 30/7

7:44 p.m.-10:21 a.m.

1 stop14h 37m

C$ 652

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Wed 17/6

11:02 a.m.-6:54 p.m.

1 stop7h 52m

Montreal Pierre Elliott Trudeau Intl

Wed 24/6

9:30 a.m.-4:49 p.m.

1 stop7h 19m

C$ 681

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sun 17/5

6:02 a.m.-1:40 p.m.

1 stop7h 38m

Toronto Pearson Intl

Sun 24/5

6:00 a.m.-1:58 p.m.

1 stop7h 58m

C$ 696

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 6/6

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

1 stop5h 34m

Toronto Pearson Intl

Wed 10/6

9:44 a.m.-2:34 p.m.

1 stop4h 50m

C$ 728

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Wed 17/6

1:36 p.m.-9:50 a.m.

1 stop20h 14m

Montreal Pierre Elliott Trudeau Intl

Wed 24/6

10:30 a.m.-11:59 p.m.

2 stops13h 29m

C$ 731

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Mon 1/6

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

1 stop20h 15m

Montreal Pierre Elliott Trudeau Intl

Mon 8/6

10:30 a.m.-11:59 p.m.

2 stops13h 29m

C$ 734

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 4/8

10:01 a.m.-11:13 p.m.

1 stop13h 12m

Toronto Pearson Intl

Wed 5/8

7:27 p.m.-9:21 a.m.

1 stop13h 54m

C$ 737

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 27/10

3:00 p.m.-11:13 p.m.

1 stop8h 13m

Toronto Pearson Intl

Sun 1/11

6:00 a.m.-1:53 p.m.

1 stop7h 53m

C$ 739

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/4

Showing 1-10 of 38 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
No data available for this route at this time. Please check back soon.

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?

    Delta, American Airlines, and United Airlines can get you from Portland, Maine to Region of Ontario in just under 5h 34m. Your travel time can differ by up to 14h 42m. 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.

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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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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