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Cheap flights from Portland, ME to Ontario from C$ 311

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 27/6. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
5 Mar — 12 Mar1
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 3 February 2026.

Fri 27/25:40 p.m.
PWM
-
YYZ
1 stop17h 19m
American Airlines
Sat 21/36:00 a.m.
YYZ
-
PWM
1 stop17h 34m
American Airlines
Deal found 3/2C$ 600
Sat 28/25:57 p.m.
PWM
-
YYZ
1 stop17h 01m
American Airlines
Wed 18/31:55 p.m.
YYZ
-
PWM
2 stops10h 00m
American Airlines
Deal found 3/2C$ 696
Mon 23/26:00 a.m.
PWM
-
YYZ
1 stop10h 41m
American Airlines
Fri 27/25:22 p.m.
YYZ
-
PWM
1 stop17h 18m
American Airlines
Deal found 2/2C$ 736
Wed 18/36:00 a.m.
PWM
-
YYZ
1 stop10h 41m
American Airlines
Wed 25/31:55 p.m.
YYZ
-
PWM
2 stops10h 00m
American Airlines
Deal found 1/2C$ 758
Thu 19/36:00 a.m.
PWM
-
YYZ
1 stop10h 41m
American Airlines
Thu 26/310:58 a.m.
YYZ
-
PWM
1 stop12h 57m
American Airlines
Deal found 2/2C$ 766
Sat 27/64:50 p.m.
PWM
-
YYZ
1 stop24h 33m
WestJet
Mon 29/64:05 p.m.
YYZ
-
PWM
2 stops18h 56m
WestJet
Deal found 2/2C$ 772
Thu 26/26:00 a.m.
PWM
-
YUL
2 stops16h 56m
American Airlines
Mon 2/37:30 a.m.
YUL
-
PWM
2 stops16h 20m
American Airlines
Deal found 2/2C$ 778
Thu 19/36:19 p.m.
PWM
-
YYZ
2 stops26h 50m
Multiple Airlines
Thu 26/38:20 p.m.
YYZ
-
PWM
1 stop12h 47m
Multiple Airlines
Deal found 2/2C$ 781
Wed 18/311:45 a.m.
PWM
-
YUL
1 stop6h 50m
Delta
Wed 25/32:29 p.m.
YUL
-
PWM
1 stop8h 43m
Delta
Deal found 1/2C$ 817
Thu 19/35:48 p.m.
PWM
-
YYZ
1 stop15h 40m
Delta
Sun 22/36:20 a.m.
YYZ
-
PWM
1 stop5h 49m
Delta
Deal found 2/2C$ 822
Sat 27/66:00 a.m.
PWM
-
YYZ
1 stop10h 45m
American Airlines
Mon 29/611:00 a.m.
YYZ
-
PWM
1 stop12h 45m
American Airlines
Deal found 2/2C$ 828
Fri 27/26:00 a.m.
PWM
-
YYZ
1 stop10h 41m
American Airlines
Fri 6/31:55 p.m.
YYZ
-
PWM
2 stops9h 55m
American Airlines
Deal found 2/2C$ 834

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 3 February 2026.

Round-trip from

C$ 600

One-way from

C$ 311

Popular in

December

Cheapest in

March

Average price

C$ 660
American Airlines
  • American Airlines
  • 27/2-21/3
  • 2 total stops
  • 34h 53m total
  • Portland to Ontario
Search Deals
Delta
  • Delta
  • 27/6
  • 1 total stop
  • 9h 05m total
  • Portland to Ontario
Search Deals
Highest demand for flights based on searches. 27% potential increase in price (C$ 420 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 57 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 3 February 2026.
Use the filters below to find and compare flights from Portland to Ontario that are best for you.

Fly from

Portland

Fly to

Ontario

Route

Depart

Return

Price

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 27/2

5:40 p.m.-10:59 a.m.

1 stop17h 19m

Toronto Pearson Intl

Sat 21/3

6:00 a.m.-11:34 p.m.

1 stop17h 34m

C$ 600

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 28/2

5:57 p.m.-12:30 p.m.

1 stop18h 33m

Toronto Pearson Intl

Wed 18/3

6:00 a.m.-5:07 p.m.

1 stop11h 07m

C$ 600

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Wed 18/3

6:00 a.m.-4:41 p.m.

1 stop10h 41m

Toronto Pearson Intl

Wed 25/3

10:58 a.m.-11:55 p.m.

1 stop12h 57m

C$ 696

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 27/2

6:00 a.m.-4:41 p.m.

1 stop10h 41m

Toronto Pearson Intl

Fri 6/3

5:22 p.m.-10:40 a.m.

1 stop17h 18m

C$ 736

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Mon 23/2

6:00 a.m.-4:41 p.m.

1 stop10h 41m

Toronto Pearson Intl

Fri 27/2

5:22 p.m.-10:40 a.m.

1 stop17h 18m

C$ 736

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 19/3

6:00 a.m.-4:41 p.m.

1 stop10h 41m

Toronto Pearson Intl

Thu 26/3

10:58 a.m.-11:55 p.m.

1 stop12h 57m

C$ 766

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 19/3

5:48 p.m.-9:28 a.m.

1 stop15h 40m

Toronto Pearson Intl

Sat 21/3

12:15 p.m.-4:06 p.m.

1 stop3h 51m

C$ 772

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 27/6

4:50 p.m.-5:23 p.m.

1 stop24h 33m

Toronto Pearson Intl

Mon 29/6

4:05 p.m.-11:01 a.m.

2 stops18h 56m

C$ 772

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Thu 19/3

6:00 a.m.-10:56 p.m.

2 stops16h 56m

Montreal Pierre Elliott Trudeau Intl

Thu 26/3

7:30 a.m.-11:55 p.m.

2 stops16h 25m

C$ 778

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Tue 17/3

6:00 a.m.-10:56 p.m.

2 stops16h 56m

Montreal Pierre Elliott Trudeau Intl

Tue 24/3

7:30 a.m.-11:55 p.m.

2 stops16h 25m

C$ 778

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/2

Showing 1-10 of 33 results
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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, March is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of C$ 160). Flying from Portland, Maine to Region of Ontario in December is currently the most expensive (average of C$ 296). 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?

    American Airlines and Delta can get you from Portland, Maine to Region of Ontario in just under 6h 50m. Your travel time can differ by up to 10h 29m. The distance from Portland, Maine to Region of Ontario is about 340 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, March is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of C$ 160). Flying from Portland, Maine to Region of Ontario in December is currently the most expensive (average of C$ 296). 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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Alternative routes for Portland to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

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How does Cheapflights help users find flights from Portland to Ontario?

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