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Cheap flights from Ontario to Portland, ME from C$ 297

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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — PWM
17 Apr — 24 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Portland

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Portland
Explore the most affordable flight options available from Ontario to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 March 2026.

Mon 20/46:00 a.m.
YYZ
-
PWM
1 stop18h 46m
Delta
Sat 25/42:51 p.m.
PWM
-
YYZ
1 stop8h 16m
Delta
Deal found 16/3C$ 497
Sat 18/47:15 a.m.
YYZ
-
PWM
1 stop7h 52m
American Airlines
Sat 25/43:40 p.m.
PWM
-
YYZ
1 stop18h 39m
American Airlines
Deal found 13/3C$ 522
Mon 20/46:00 a.m.
YYZ
-
PWM
1 stop18h 46m
Delta
Mon 27/42:51 p.m.
PWM
-
YYZ
1 stop20h 35m
Delta
Deal found 16/3C$ 550
Wed 29/47:15 a.m.
YYZ
-
PWM
1 stop7h 54m
American Airlines
Wed 6/510:24 a.m.
PWM
-
YYZ
1 stop8h 21m
American Airlines
Deal found 15/3C$ 556
Mon 20/47:15 a.m.
YYZ
-
PWM
1 stop7h 54m
American Airlines
Mon 27/43:39 p.m.
PWM
-
YYZ
1 stop7h 32m
American Airlines
Deal found 16/3C$ 559
Tue 31/38:50 a.m.
YYZ
-
PWM
1 stop12h 50m
United Airlines
Sat 4/46:00 a.m.
PWM
-
YYZ
1 stop5h 43m
United Airlines
Deal found 15/3C$ 612
Fri 3/45:22 p.m.
YYZ
-
PWM
1 stop6h 33m
American Airlines
Mon 6/47:00 a.m.
PWM
-
YYZ
1 stop15h 55m
American Airlines
Deal found 17/3C$ 622
Thu 4/67:30 a.m.
YYZ
-
PWM
1 stop5h 55m
United Airlines
Sun 7/65:15 a.m.
PWM
-
YYZ
1 stop4h 49m
United Airlines
Deal found 15/3C$ 627
Tue 31/36:35 p.m.
YUL
-
PWM
1 stop15h 47m
United Airlines
Wed 1/43:22 p.m.
PWM
-
YUL
1 stop6h 44m
United Airlines
Deal found 15/3C$ 629
Fri 21/89:45 a.m.
YUL
-
PWM
1 stop7h 59m
United Airlines
Fri 28/89:15 a.m.
PWM
-
YUL
1 stop8h 15m
United Airlines
Deal found 16/3C$ 644
Fri 21/810:31 a.m.
YUL
-
PWM
1 stop25h 53m
American Airlines
Fri 28/81:14 p.m.
PWM
-
YUL
1 stop20h 36m
American Airlines
Deal found 13/3C$ 649
Wed 29/72:45 p.m.
YYZ
-
PWM
1 stop6h 56m
United Airlines
Wed 5/86:00 a.m.
PWM
-
YYZ
1 stop5h 49m
United Airlines
Deal found 15/3C$ 650

Find flight deals from Ontario to Portland

Keep the following information in mind while searching for Ontario to Portland flight deals. Data was last updated 18 March 2026.

Round-trip from

C$ 497

One-way from

C$ 297

Popular in

May

Cheapest in

June

Average price

C$ 592
Delta
  • Delta
  • 20/4-25/4
  • 2 total stops
  • 27h 02m total
  • Ontario to Portland
Search Deals
9/4
  • 9/4
  • 1 total stop
  • 25h 57m total
  • Ontario to Portland
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Portland 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 March 2026.
Use the filters below to find and compare flights from Ontario to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Tue 21/4

12:09 p.m.-12:46 a.m.

1 stop12h 37m

Portland

Mon 27/4

2:51 p.m.-11:26 a.m.

1 stop20h 35m

C$ 550

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Mon 20/4

6:00 a.m.-12:46 a.m.

1 stop18h 46m

Portland

Mon 27/4

2:51 p.m.-11:26 a.m.

1 stop20h 35m

C$ 550

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Tue 21/4

7:25 p.m.-9:54 a.m.

1 stop14h 29m

Portland

Mon 27/4

3:39 p.m.-11:11 p.m.

1 stop7h 32m

C$ 559

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Thu 30/4

7:43 p.m.-11:59 p.m.

1 stop4h 16m

Portland

Thu 7/5

6:00 a.m.-3:46 p.m.

1 stop9h 46m

C$ 612

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Tue 31/3

8:50 a.m.-3:22 p.m.

1 stop6h 32m

Portland

Sat 4/4

6:00 a.m.-11:43 a.m.

1 stop5h 43m

C$ 612

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Mon 30/3

2:45 p.m.-9:40 p.m.

1 stop6h 55m

Portland

Thu 2/4

6:33 p.m.-9:54 a.m.

1 stop15h 21m

C$ 613

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Fri 3/4

2:45 p.m.-9:40 p.m.

1 stop6h 55m

Portland

Mon 6/4

7:36 p.m.-10:04 a.m.

1 stop14h 28m

C$ 613
Quickest round-trip

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Thu 25/6

7:43 p.m.-11:51 p.m.

1 stop4h 08m

Portland

Mon 29/6

6:00 a.m.-11:49 a.m.

1 stop5h 49m

C$ 627

MontrealPortland

YUL - PWM

YULPWM

Montreal Pierre Elliott Trudeau Intl

Tue 31/3

6:35 p.m.-10:22 a.m.

1 stop15h 47m

Portland

Wed 1/4

3:22 p.m.-10:06 p.m.

1 stop6h 44m

C$ 629

MontrealPortland

YUL - PWM

YULPWM

Montreal Pierre Elliott Trudeau Intl

Thu 2/4

9:45 a.m.-5:32 p.m.

1 stop7h 47m

Portland

Sun 5/4

10:00 a.m.-2:40 p.m.

1 stop4h 40m

C$ 629

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/3

Showing 1-10 of 33 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Ontario 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 Ontario to Portland

What is the cheapest month to book a flight from Region of Ontario to Portland, Maine?

Currently, March is the cheapest month in which you can book a flight from Region of Ontario to Portland, Maine (average of C$ 242). Flying from Region of Ontario to Portland, Maine in June is currently the most expensive (average of C$ 283). 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 Ontario to Portland. 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 into for flights to Portland from Ontario?

    For a flight from Ontario to Portland, you will be flying into Portland. Portland (PWM) is just 4.7 km from the centre of the city.

  • How long is the flight from Region of Ontario to Portland, Maine?

    A quick flight from Region of Ontario to Portland, Maine can take about 4h 16m. Delta provides one of the quickest options available for as low as C$ 612. The distance between Region of Ontario and Portland, Maine 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 Ontario to Portland that include hotel bookings?

    Yes. In addition to deals on Ontario to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Portland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Portland.

  • Can I find deals for business class flights from Ontario to Portland?

    Yes. Cheapflights offers flight deals from Ontario to Portland 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 Region of Ontario to Portland, Maine?

    Currently, March is the cheapest month in which you can book a flight from Region of Ontario to Portland, Maine (average of C$ 242). Flying from Region of Ontario to Portland, Maine in June is currently the most expensive (average of C$ 283). 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

Travelling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
North Conway

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Ontario to Portland

Discover the top 2 airlines that operate flights from Ontario to Portland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 18 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 388AverageC$ 676FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 490AverageC$ 682FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

When you search for this flight from Ontario to Portland, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Portland?

Cheapflights simply makes it quick and affordable to book flights from Ontario to Portland by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Ontario to Portland with no change fees?

Yes! Cheapflights helps users easily find flights from Ontario to Portland with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to Portland become cheaper?

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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