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$190+ Cheap flights from Ontario to Portland, ME (PWM)

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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — PWM
Jan 16 — Jan 231
Fri 1/16
Fri 1/23
1 adult, Economy
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Cheap flight deals from Ontario to Portland

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 December 17, 2025.

This American Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:34 pmYYZ - PWM
1 stop5h 37mAmerican Airlines
Sun 12/285:45 amPWM - YYZ
1 stop9h 45mAmerican Airlines
Deal found 12/17$861
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:10 pmYYZ - PWM
2 stops6h 41mUnited Airlines
Sun 12/286:00 amPWM - YYZ
1 stop6h 49mUnited Airlines
Deal found 12/17$878
This Kiwi.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:45 amYUL - PWM
2 stops9h 23mWestJet
Sun 12/284:48 pmPWM - YUL
1 stop6h 31mWestJet
Deal found 12/15$897
This United Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/237:00 amYUL - PWM
1 stop6h 39mUnited Airlines
Sun 12/282:55 pmPWM - YUL
1 stop6h 47mUnited Airlines
Deal found 12/15$904
This American Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2312:59 pmYUL - PWM
2 stops27h 40mAmerican Airlines
Sun 12/2812:21 pmPWM - YUL
2 stops23h 59mAmerican Airlines
Deal found 12/15$1,092

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 December 17, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$304
(United Airlines)

One-way from

$190
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$297
Provider with most accurate pricing for Toronto (YTO)-Boston Logan Intl flight deals.
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Provider most trusted by Cheapflights users for Toronto (YTO)-Boston Logan Intl flights.
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From Ontario to Portland
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One-way flight from Ontario to Portland
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 2,558,603 searches. Data last updated December 17, 2025.
Use the filters below to find and compare flights from Ontario to Portland that are best for you.

Fly from

Ontario

Fly to

Portland

Route

Depart

Return

Price

OttawaPortland

YOW - PWM

YOWPWM

Ottawa

Thu 1/29

9:45 am-2:31 pm

1 stop4h 46m

Portland

Fri 1/30

3:12 pm-9:56 pm

1 stop6h 44m

$304

OttawaPortland

YOW - PWM

YOWPWM

Ottawa

Thu 1/29

5:55 pm-11:30 pm

1 stop5h 35m

Portland

Fri 1/30

8:40 am-5:41 pm

2 stops9h 01m

$361

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Fri 1/30

5:15 pm-12:06 pm

1 stop18h 51m

Portland

Fri 2/6

5:20 am-4:35 pm

1 stop11h 15m

$395

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Tue 1/13

12:10 pm-11:22 pm

2 stops11h 12m

Portland

Tue 1/20

2:35 pm-10:56 pm

1 stop8h 21m

$409

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Fri 1/30

7:10 am-10:22 am

1 stop27h 12m

Portland

Fri 2/6

11:29 am-11:28 am

2 stops23h 59m

$416

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

Mon 1/26

2:25 pm-11:22 pm

1 stop8h 57m

Portland

Thu 1/29

6:00 am-5:53 pm

1 stop11h 53m

$448

MontrealPortland

YUL - PWM

YULPWM

Montreal Pierre Elliott Trudeau Intl

Wed 2/11

12:54 pm-12:20 am

2 stops11h 26m

Portland

Tue 3/10

2:30 pm-11:57 am

2 stops21h 27m

$450

MontrealPortland

YUL - PWM

YULPWM

Montreal Pierre Elliott Trudeau Intl

Wed 3/4

12:52 pm-1:43 pm

2 stops24h 51m

Portland

Tue 3/31

5:45 pm-8:30 am

1 stop14h 45m

$450

MontrealPortland

YUL - PWM

YULPWM

Montreal Pierre Elliott Trudeau Intl

Wed 3/4

9:29 am-11:18 am

1 stop25h 49m

Portland

Mon 3/30

6:03 am-8:30 am

1 stop26h 27m

$450

MontrealPortland

YUL - PWM

YULPWM

Montreal Pierre Elliott Trudeau Intl

Wed 3/4

12:52 pm-1:43 pm

2 stops24h 51m

Portland

Fri 3/27

6:03 am-6:35 pm

1 stop12h 32m

$450

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 29 results
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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, December is the cheapest month in which you can book a flight from Region of Ontario to Portland, Maine (average of $168). Flying from Region of Ontario to Portland, Maine in February is currently the most expensive (average of $213). 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.

What is the cheapest time of day to fly from ON to PWM?

Find hourly flight availability from Ontario to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 17, 2025.

A simple way to save on the total cost of your ticket is to fly from Region of Ontario to Portland, Maine in the evening. If you’re flexible enough to do this you can expect to save up to 35% on your trip compared to booking a flight at noon.

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?

    Portland (PWM) is the airport you will fly into if you book a flight from Ontario to Portland. It is only a 2.9 mi journey from Portland (PWM) to Portland’s city center.

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

    Departing from Region of Ontario to Portland, Maine will take you 4h 46m. There are 288 mi between Region of Ontario and Portland, Maine. This flight may include one or multiple stops.

  • What are the most popular routes from Region of Ontario to Portland, Maine?

    The most popular flight routes from Region of Ontario to Portland, Maine are Toronto Pearson Intl - Portland, Montreal Pierre Elliott Trudeau Intl - Portland and Ottawa - Portland.

  • 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, December is the cheapest month in which you can book a flight from Region of Ontario to Portland, Maine (average of $168). Flying from Region of Ontario to Portland, Maine in February is currently the most expensive (average of $213). 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

Traveling to a place near Portland?

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

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Alternative routes for Ontario to Portland

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