HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portland

$176+ 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 1/2. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — PWM
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Portland with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Portland

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

Round-trip from

$301
(United Airlines)

One-way from

$176
(United Airlines)

Popular in

May

Cheapest in

November

Average price

$585
From Ontario to Portland
Search Deals
One-way flight from Ontario to Portland
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find 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 octubre 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
jue. 11/277:35 amYYZ - PWM
1 stop9h 25mMultiple Airlines
jue. 12/411:58 amPWM - YYZ
2 stops30h 58mMultiple Airlines
Deal found 10/29$458
This American Airlines deal was found by Cheapflights users on 10/29. 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.
sáb. 12/1310:58 amYYZ - PWM
1 stop10h 44mAmerican Airlines
sáb. 12/205:20 pmPWM - YYZ
1 stop18h 25mAmerican Airlines
Deal found 10/29$499
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
vie. 11/712:50 pmYYZ - PWM
1 stop21h 46mMultiple Airlines
dom. 11/95:40 pmPWM - YYZ
1 stop24h 04mMultiple Airlines
Deal found 10/27$511
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/256:00 pmYYZ - PWM
1 stop5h 54mDelta
mar. 12/24:53 pmPWM - YYZ
1 stop6h 18mDelta
Deal found 10/27$535
This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/89:35 amYUL - PWM
1 stop6h 28mDelta
lun. 12/156:00 amPWM - YUL
1 stop7h 47mDelta
Deal found 10/30$536
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
sáb. 12/138:20 pmYYZ - PWM
2 stops38h 21mMultiple Airlines
sáb. 12/206:18 pmPWM - YYZ
1 stop27h 01mMultiple Airlines
Deal found 10/29$537
This United Airlines deal was found by Cheapflights users on 10/28. 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.
sáb. 12/610:00 amYYZ - PWM
1 stop4h 19mUnited Airlines
sáb. 12/64:25 pmPWM - YYZ
1 stop7h 34mUnited Airlines
Deal found 10/28$545
This United Airlines deal was found by Cheapflights users on 10/27. 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.
mar. 11/252:15 pmYYZ - PWM
2 stops8h 46mUnited Airlines
mar. 12/23:00 pmPWM - YYZ
1 stop4h 17mUnited Airlines
Deal found 10/27$588
This United Airlines deal was found by Cheapflights users on 10/30. 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.
lun. 12/87:00 amYUL - PWM
1 stop6h 38mUnited Airlines
lun. 12/159:45 amPWM - YUL
2 stops21h 47mUnited Airlines
Deal found 10/30$590
This United deal was found by Cheapflights users on 10/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/66:50 amYYZ - PWM
1 stop7h 32mMultiple Airlines
sáb. 12/67:46 pmPWM - YYZ
2 stops16h 54mMultiple Airlines
Deal found 10/28$603
This United Airlines deal was found by Cheapflights users on 10/28. 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.
vie. 12/127:30 amYYZ - PWM
1 stop6h 08mUnited Airlines
vie. 12/196:00 amPWM - YYZ
1 stop5h 48mUnited Airlines
Deal found 10/28$606
This American Airlines deal was found by Cheapflights users on 10/30. 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.
lun. 12/87:30 amYUL - PWM
2 stops16h 07mAmerican Airlines
lun. 12/155:34 amPWM - YUL
2 stops17h 25mAmerican Airlines
Deal found 10/30$616

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 octubre 30, 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

dom. 4/5

6:52 am-1:52 pm

1 stop7h 00m

Portland

jue. 4/9

11:17 am-4:15 pm

1 stop4h 58m

$301

OttawaPortland

YOW - PWM

YOWPWM

Ottawa

dom. 4/5

1:30 pm-6:20 pm

1 stop4h 50m

Portland

jue. 4/9

6:00 am-4:16 pm

2 stops10h 16m

$354

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

jue. 11/27

7:35 am-5:00 pm

1 stop9h 25m

Portland

jue. 12/4

11:58 am-6:56 pm

2 stops30h 58m

$458

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

sáb. 12/13

10:58 am-9:42 pm

1 stop10h 44m

Portland

sáb. 12/20

5:20 pm-11:45 am

1 stop18h 25m

$499

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

vie. 11/7

12:50 pm-10:36 am

1 stop21h 46m

Portland

dom. 11/9

5:40 pm-5:44 pm

1 stop24h 04m

$511

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

mar. 11/25

6:00 pm-11:54 pm

1 stop5h 54m

Portland

mar. 12/2

4:53 pm-11:11 pm

1 stop6h 18m

$535

MontrealPortland

YUL - PWM

YULPWM

Montreal Pierre Elliott Trudeau Intl

lun. 12/8

9:35 am-4:03 pm

1 stop6h 28m

Portland

lun. 12/15

6:00 am-1:47 pm

1 stop7h 47m

$536

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

sáb. 12/13

8:20 pm-10:41 am

2 stops38h 21m

Portland

sáb. 12/20

6:18 pm-9:19 pm

1 stop27h 01m

$537

TorontoPortland

YYZ - PWM

YYZPWM

Toronto Pearson Intl

sáb. 12/6

10:00 am-2:19 pm

1 stop4h 19m

Portland

sáb. 12/6

4:25 pm-11:59 pm

1 stop7h 34m

$545

MontrealPortland

YUL - PWM

YULPWM

Montreal Pierre Elliott Trudeau Intl

lun. 3/30

9:30 am-2:34 pm

1 stop5h 04m

Portland

mié. 4/1

11:50 am-5:51 pm

1 stop6h 01m

$554

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 33 results
1
2
3
4

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, September is the cheapest month in which you can book a flight from Region of Ontario to Portland, Maine (average of $133). Flying from Region of Ontario to Portland, Maine in February is currently the most expensive (average of $228). 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 octubre 30, 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 50m. 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, September is the cheapest month in which you can book a flight from Region of Ontario to Portland, Maine (average of $133). Flying from Region of Ontario to Portland, Maine in February is currently the most expensive (average of $228). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Portland

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Boston flights
Pierre Elliott Trudeau Intl to Boston flights
Toronto Island to Boston flights
Vancouver Intl to Boston flights
Halifax to Boston flights
Ottawa to Boston flights
Hamilton to Boston flights
Calgary to Boston flights
Edmonton to Boston flights
Québec City to Boston flights
Moncton to Boston flights
Pearson Intl to Portland flights
Winnipeg to Boston flights
Victoria to Boston flights
Pearson Intl to Bangor flights
St. John's to Boston flights
Halifax to Portland flights
St John to Boston flights
Pierre Elliott Trudeau Intl to Portland flights
London to Boston flights
Québec City to Bangor flights
Thunder Bay to Boston flights
Pierre Elliott Trudeau Intl to Bangor flights
Saskatoon to Boston flights
Timmins to Boston flights
Edmonton to Portland flights
Vancouver Intl to Portland flights
Regina to Boston flights
Kamloops to Boston flights
Ottawa to Portland flights
Calgary to Portland flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.