Cheap flights from Ontario to Portland, ME from C$ 267
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 23/11. Fares are subject to change and may not be available on all flights or dates of travel.
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 17 September 2025.
Find flight deals from Ontario to Portland
Cheapest flights from Ontario to PortlandExplore 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 17 September 2025.
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 17 September 2025.
Cheapflights Fare Finder
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
TorontoPortland
YYZ - PWM
YYZPWM
Toronto Pearson Intl
Sat 18/10
7:15 a.m.-5:38 p.m.
1 stop10h 23m
Portland
Sat 25/10
8:50 a.m.-6:35 p.m.
1 stop9h 45m
TorontoPortland
YYZ - PWM
YYZPWM
Toronto Pearson Intl
Fri 24/10
10:40 p.m.-11:31 a.m.
2 stops36h 51m
Portland
Fri 31/10
9:46 a.m.-8:00 p.m.
1 stop10h 14m
TorontoPortland
YYZ - PWM
YYZPWM
Toronto Pearson Intl
Fri 31/10
12:50 p.m.-10:36 a.m.
1 stop21h 46m
Portland
Fri 7/11
2:36 p.m.-2:40 p.m.
2 stops24h 04m
TorontoPortland
YYZ - PWM
YYZPWM
Toronto Pearson Intl
Thu 9/10
7:29 a.m.-8:14 p.m.
1 stop12h 45m
Portland
Thu 16/10
7:00 a.m.-6:35 p.m.
1 stop11h 35m
TorontoPortland
YYZ - PWM
YYZPWM
Toronto Pearson Intl
Fri 31/10
2:57 p.m.-11:17 p.m.
1 stop8h 20m
Portland
Fri 7/11
6:00 a.m.-1:43 p.m.
1 stop7h 43m
MontrealPortland
YUL - PWM
YULPWM
Montreal Pierre Elliott Trudeau Intl
Tue 14/10
12:59 p.m.-11:51 p.m.
2 stops10h 52m
Portland
Tue 21/10
6:00 a.m.-10:55 p.m.
2 stops16h 55m
TorontoPortland
YYZ - PWM
YYZPWM
Toronto Pearson Intl
Tue 14/10
2:30 p.m.-11:09 p.m.
1 stop8h 39m
Portland
Tue 21/10
6:50 a.m.-5:23 p.m.
1 stop10h 33m
TorontoPortland
YYZ - PWM
YYZPWM
Toronto Pearson Intl
Tue 14/10
6:09 p.m.-10:49 a.m.
2 stops16h 40m
Portland
Sat 18/10
12:00 p.m.-9:29 a.m.
1 stop21h 29m
TorontoPortland
YYZ - PWM
YYZPWM
Toronto Pearson Intl
Wed 1/10
7:20 a.m.-8:11 p.m.
1 stop12h 51m
Portland
Sat 4/10
6:00 a.m.-4:33 p.m.
1 stop10h 33m
MontrealPortland
YUL - PWM
YULPWM
Montreal Pierre Elliott Trudeau Intl
Sat 1/11
5:30 p.m.-3:12 p.m.
2 stops21h 42m
Portland
Sat 8/11
4:51 p.m.-7:32 a.m.
2 stops14h 41m
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.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Portland
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 17 September 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to Portland, Maine as you normally would.
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.
Travelling to a place near Portland?
Book flights to Portland if you plan to visit one of these locationsBrowse 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.
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 17 September 2025.
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!