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Cheap flights from Portland, ME to Ontario from C$ 250

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 14/12. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portland to Ontario

Keep the following information in mind while searching for Portland to Ontario flight deals. Data was last updated 30 October 2025.

Round-trip from

C$ 563

One-way from

C$ 250

Popular in

October

Cheapest in

March

Average price

C$ 1,042
26/1-27/1
  • 26/1-27/1
  • 2 total stops
  • 41h 42m total
  • Portland to Ontario
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14/12
  • 14/12
  • 1 total stop
  • 26h 56m total
  • Portland to Ontario
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 192 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 37 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 30 October 2025.

Fri 12/129:46 a.m.PWM - YYZ
1 stop10h 14mMultiple Airlines
Fri 19/127:10 a.m.YYZ - PWM
1 stop27h 26mMultiple Airlines
Deal found 29/10C$ 619
Sun 14/1211:58 a.m.PWM - YYZ
1 stop26h 56mMultiple Airlines
Sun 21/128:00 p.m.YYZ - PWM
1 stop13h 06mMultiple Airlines
Deal found 30/10C$ 627
Wed 10/1211:16 a.m.PWM - YYZ
1 stop12h 55mMultiple Airlines
Fri 19/127:10 a.m.YYZ - PWM
1 stop27h 26mMultiple Airlines
Deal found 29/10C$ 645
Sat 6/1211:16 a.m.PWM - YYZ
1 stop12h 55mMultiple Airlines
Mon 8/1211:30 p.m.YYZ - PWM
2 stops35h 06mMultiple Airlines
Deal found 30/10C$ 680
Wed 19/1111:16 a.m.PWM - YUL
2 stops29h 09mMultiple Airlines
Sun 23/114:35 p.m.YUL - PWM
1 stop16h 31mMultiple Airlines
Deal found 29/10C$ 687
Sun 14/1211:58 a.m.PWM - YUL
2 stops32h 45mMultiple Airlines
Sun 21/124:35 p.m.YUL - PWM
1 stop16h 31mMultiple Airlines
Deal found 30/10C$ 714
Sat 6/1212:12 p.m.PWM - YYZ
1 stop8h 15mDelta
Mon 8/126:00 a.m.YYZ - PWM
1 stop7h 54mDelta
Deal found 30/10C$ 743
Thu 13/115:40 p.m.PWM - YYZ
1 stop24h 04mMultiple Airlines
Sun 16/117:10 a.m.YYZ - PWM
1 stop25h 56mMultiple Airlines
Deal found 30/10C$ 764
Mon 1/129:46 a.m.PWM - YYZ
1 stop14h 25mMultiple Airlines
Wed 3/127:35 a.m.YYZ - PWM
1 stop27h 43mMultiple Airlines
Deal found 30/10C$ 796
Sat 6/125:34 a.m.PWM - YYZ
2 stops11h 53mAmerican Airlines
Mon 8/1212:36 p.m.YYZ - PWM
2 stops11h 01mAmerican Airlines
Deal found 30/10C$ 817
Sat 13/126:00 a.m.PWM - YUL
1 stop7h 47mDelta
Sat 20/126:35 p.m.YUL - PWM
1 stop4h 15mDelta
Deal found 29/10C$ 846
Sat 13/1211:16 a.m.PWM - YUL
1 stop13h 14mMultiple Airlines
Sat 20/127:20 p.m.YUL - PWM
2 stops37h 46mMultiple Airlines
Deal found 29/10C$ 859

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 30 October 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

Mon 26/1

9:47 a.m.-12:11 a.m.

1 stop14h 24m

Toronto Pearson Intl

Tue 27/1

2:20 p.m.-5:38 p.m.

1 stop27h 18m

C$ 563

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 12/12

9:46 a.m.-8:00 p.m.

1 stop10h 14m

Toronto Pearson Intl

Fri 19/12

7:10 a.m.-10:36 a.m.

1 stop27h 26m

C$ 619

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Tue 27/1

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

1 stop7h 22m

Montreal Pierre Elliott Trudeau Intl

Wed 28/1

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

1 stop9h 07m

C$ 621

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 10/1

5:30 a.m.-4:35 p.m.

1 stop11h 05m

Toronto Pearson Intl

Sun 11/1

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

1 stop18h 51m

C$ 624

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Wed 7/1

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

1 stop11h 15m

Toronto Pearson Intl

Sat 10/1

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

1 stop18h 51m

C$ 624

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sun 14/12

11:58 a.m.-2:54 p.m.

1 stop26h 56m

Toronto Pearson Intl

Sun 21/12

8:00 p.m.-9:06 a.m.

1 stop13h 06m

C$ 627

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Wed 10/12

11:16 a.m.-12:11 a.m.

1 stop12h 55m

Toronto Pearson Intl

Fri 19/12

7:10 a.m.-10:36 a.m.

1 stop27h 26m

C$ 645

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Tue 13/1

4:10 p.m.-4:01 p.m.

1 stop23h 51m

Montreal Pierre Elliott Trudeau Intl

Sun 18/1

9:25 a.m.-11:30 p.m.

2 stops14h 05m

C$ 723

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 10/1

4:10 p.m.-4:39 p.m.

1 stop24h 29m

Toronto Pearson Intl

Sun 11/1

9:00 p.m.-2:39 p.m.

1 stop17h 39m

C$ 736

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 6/12

12:12 p.m.-8:27 p.m.

1 stop8h 15m

Toronto Pearson Intl

Mon 8/12

6:00 a.m.-1:54 p.m.

1 stop7h 54m

C$ 743

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

Showing 1-10 of 20 results
1
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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, October is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of C$ 154). Flying from Portland, Maine to Region of Ontario in December is currently the most expensive (average of C$ 223). 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?

    Delta, American Airlines, and United Airlines can get you from Portland, Maine to Region of Ontario in just under 7h 22m. Your travel time can differ by up to 16h 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, October is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of C$ 154). Flying from Portland, Maine to Region of Ontario in December is currently the most expensive (average of C$ 223). 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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