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Cheap flights from Portland, ME to Ontario from C$ 369

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 15/1. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
17 Jan — 24 Jan1
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 18 December 2025.

Sun 21/1211:58 a.m.PWM - YYZ
1 stop11h 51mMultiple Airlines
Tue 23/127:10 a.m.YYZ - PWM
1 stop27h 26mMultiple Airlines
Deal found 17/12C$ 1,026
Wed 24/127:01 p.m.PWM - YYZ
1 stop4h 19mUnited Airlines
Wed 31/127:30 a.m.YYZ - PWM
1 stop6h 09mUnited Airlines
Deal found 16/12C$ 1,166
Wed 24/121:22 p.m.PWM - YYZ
1 stop20h 54mAmerican Airlines
Fri 26/126:15 p.m.YYZ - PWM
1 stop4h 40mAmerican Airlines
Deal found 16/12C$ 1,288
Wed 24/127:00 a.m.PWM - YYZ
2 stops25h 25mWestJet
Wed 31/1211:15 p.m.YYZ - PWM
2 stops13h 02mWestJet
Deal found 16/12C$ 2,561

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 18 December 2025.

Round-trip from

C$ 517

One-way from

C$ 369

Popular in

December

Cheapest in

October

Average price

C$ 506
31/1-7/2
  • 31/1-7/2
  • 3 total stops
  • 23h 32m total
  • Portland to Ontario
Search Deals
Delta
  • Delta
  • 15/1
  • 2 total stops
  • 21h 29m total
  • Portland to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 74 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 18 December 2025.
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

Sat 31/1

5:30 a.m.-7:00 p.m.

2 stops13h 30m

Toronto Pearson Intl

Sat 7/2

10:30 a.m.-9:37 p.m.

2 stops11h 07m

C$ 544

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 23/1

5:20 a.m.-4:35 p.m.

1 stop11h 15m

Toronto Pearson Intl

Sun 25/1

5:15 p.m.-12:06 p.m.

1 stop18h 51m

C$ 581

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 10/2

6:00 a.m.-10:51 p.m.

1 stop16h 51m

Toronto Pearson Intl

Sun 15/2

7:50 a.m.-11:20 p.m.

1 stop15h 30m

C$ 587

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 12/2

6:00 a.m.-5:47 p.m.

1 stop11h 47m

Toronto Pearson Intl

Sun 15/2

7:50 a.m.-11:20 p.m.

1 stop15h 30m

C$ 587

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 10/2

12:43 p.m.-10:51 p.m.

1 stop10h 08m

Toronto Pearson Intl

Thu 19/2

6:00 a.m.-12:18 a.m.

1 stop18h 18m

C$ 587

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 12/2

6:00 a.m.-4:18 p.m.

1 stop10h 18m

Toronto Pearson Intl

Wed 18/2

12:05 p.m.-12:18 a.m.

1 stop12h 13m

C$ 587

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 10/2

6:00 a.m.-8:26 p.m.

1 stop14h 26m

Toronto Pearson Intl

Wed 18/2

12:05 p.m.-12:18 a.m.

1 stop12h 13m

C$ 587

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Wed 11/2

5:59 p.m.-1:24 p.m.

1 stop19h 25m

Toronto Pearson Intl

Wed 18/2

5:10 p.m.-11:18 a.m.

1 stop18h 08m

C$ 595

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Wed 14/1

6:00 a.m.-1:22 p.m.

1 stop7h 22m

Montreal Pierre Elliott Trudeau Intl

Wed 21/1

2:15 p.m.-11:22 p.m.

1 stop9h 07m

C$ 650

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Wed 14/1

6:18 p.m.-12:35 a.m.

2 stops30h 17m

Montreal Pierre Elliott Trudeau Intl

Wed 21/1

3:55 p.m.-10:21 a.m.

1 stop18h 26m

C$ 689

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/12

Showing 1-10 of 26 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, April 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 November is currently the most expensive (average of C$ 263). 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 7h 22m. Your travel time can differ by up to 6h 08m. 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, April 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 November is currently the most expensive (average of C$ 263). 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

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