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Cheap flights from Portland, ME to Ontario from C$ 334

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 26/10. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
11 Oct — 18 Oct1
1 adult
1 adult, Economy

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 11 September 2025.

Round-trip from

C$ 446

One-way from

C$ 334

Popular in

June

Cheapest in

March

Average price

C$ 772
7/12-11/12
  • 7/12-11/12
  • 2 total stops
  • 42h 47m total
  • Portland to Ontario
Search Deals
Delta
  • Delta
  • 26/10
  • 1 total stop
  • 17h 38m total
  • Portland to Ontario
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 160 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Portland to Ontario

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 11 September 2025.

Sun 7/1211:58 a.m.PWM - YYZ
1 stop26h 56mMultiple Airlines
Thu 11/125:15 p.m.YYZ - PWM
1 stop15h 51mMultiple Airlines
Deal found 9/9C$ 446
Sat 6/1211:16 a.m.PWM - YYZ
1 stop12h 55mMultiple Airlines
Wed 10/127:35 a.m.YYZ - PWM
1 stop27h 43mMultiple Airlines
Deal found 9/9C$ 470
Sat 6/1211:16 a.m.PWM - YYZ
1 stop12h 55mMultiple Airlines
Tue 9/127:15 a.m.YYZ - PWM
1 stop27h 21mMultiple Airlines
Deal found 9/9C$ 475
Sat 6/1211:16 a.m.PWM - YYZ
1 stop12h 55mMultiple Airlines
Thu 11/125:15 p.m.YYZ - PWM
1 stop15h 51mMultiple Airlines
Deal found 9/9C$ 478
Sat 6/1211:16 a.m.PWM - YYZ
1 stop12h 55mMultiple Airlines
Sun 7/128:00 p.m.YYZ - PWM
1 stop13h 06mMultiple Airlines
Deal found 9/9C$ 491
Wed 3/1211:16 a.m.PWM - YYZ
1 stop12h 55mMultiple Airlines
Wed 10/127:35 a.m.YYZ - PWM
1 stop27h 43mMultiple Airlines
Deal found 9/9C$ 500
Wed 3/1211:16 a.m.PWM - YYZ
1 stop12h 55mMultiple Airlines
Tue 9/127:15 a.m.YYZ - PWM
1 stop27h 21mMultiple Airlines
Deal found 9/9C$ 507
Wed 3/1211:16 a.m.PWM - YYZ
1 stop12h 55mMultiple Airlines
Thu 11/125:15 p.m.YYZ - PWM
1 stop15h 51mMultiple Airlines
Deal found 9/9C$ 509
Wed 3/1211:16 a.m.PWM - YYZ
1 stop12h 55mMultiple Airlines
Sun 7/127:35 a.m.YYZ - PWM
2 stops27h 06mMultiple Airlines
Deal found 9/9C$ 510
Fri 5/129:46 a.m.PWM - YYZ
1 stop10h 14mMultiple Airlines
Wed 10/127:35 a.m.YYZ - PWM
1 stop27h 43mMultiple Airlines
Deal found 9/9C$ 513
Wed 3/1211:16 a.m.PWM - YYZ
1 stop12h 55mMultiple Airlines
Fri 5/125:15 p.m.YYZ - PWM
1 stop17h 21mMultiple Airlines
Deal found 9/9C$ 514
Fri 17/105:42 a.m.PWM - YUL
1 stop26h 55mDelta
Sat 25/102:25 p.m.YUL - PWM
1 stop20h 24mDelta
Deal found 10/9C$ 522

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 11 September 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 6/12

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

1 stop12h 55m

Toronto Pearson Intl

Wed 10/12

7:35 a.m.-11:18 a.m.

1 stop27h 43m

C$ 470

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 6/12

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

1 stop12h 55m

Toronto Pearson Intl

Tue 9/12

7:15 a.m.-10:36 a.m.

1 stop27h 21m

C$ 475

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 6/12

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

1 stop12h 55m

Toronto Pearson Intl

Sun 7/12

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

1 stop13h 06m

C$ 491

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 6/12

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

1 stop12h 55m

Toronto Pearson Intl

Thu 11/12

8:30 p.m.-5:25 p.m.

2 stops20h 55m

C$ 502

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Wed 3/12

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

1 stop12h 55m

Toronto Pearson Intl

Thu 11/12

5:15 p.m.-9:06 a.m.

1 stop15h 51m

C$ 509

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 5/12

6:05 p.m.-9:19 p.m.

2 stops27h 14m

Toronto Pearson Intl

Thu 11/12

5:15 p.m.-9:06 a.m.

1 stop15h 51m

C$ 518

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Wed 1/10

6:00 a.m.-1:39 p.m.

1 stop7h 39m

Toronto Pearson Intl

Wed 8/10

6:00 a.m.-12:05 a.m.

1 stop18h 05m

C$ 521

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 2/10

6:35 a.m.-5:28 p.m.

1 stop10h 53m

Toronto Pearson Intl

Wed 8/10

6:00 a.m.-12:05 a.m.

1 stop18h 05m

C$ 521

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 24/10

5:42 a.m.-5:54 p.m.

1 stop12h 12m

Toronto Pearson Intl

Sun 26/10

6:00 a.m.-12:05 a.m.

1 stop18h 05m

C$ 521

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Wed 8/10

5:42 a.m.-1:40 p.m.

1 stop7h 58m

Toronto Pearson Intl

Tue 14/10

6:00 a.m.-12:05 a.m.

1 stop18h 05m

C$ 521

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 25 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, January is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of C$ 168). Flying from Portland, Maine to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 and American Airlines can get you from Portland, Maine to Region of Ontario in just under 25h. Your travel time can differ by up to 1h 55m. 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.

  • What are the cheapest airlines to fly from Portland, Maine to Region of Ontario one-way?

    One-way options have recently been found by users for as low as C$ 334 on Delta. Other airlines that offer cheap prices include American Airlines from C$ 391 and United Airlines from C$ 452 one-way.

  • 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, January is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of C$ 168). Flying from Portland, Maine to Region of Ontario in July is currently the most expensive (average of C$ 258). 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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