Find flights
When to book
FAQs

Cheap flights from Portland, ME to Ontario from C$ 300

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 24/7. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
21 Jul — 28 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portland to Ontario

Enter your travel dates to find the best prices.

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 21 June 2026.

Wed 11/116:31 p.m.
PWM
-
YYZ
1 stop23h 09m
Multiple Airlines
Thu 19/115:15 p.m.
YYZ
-
PWM
1 stop15h 53m
Multiple Airlines
Deal found 17/6C$ 620
Wed 11/112:35 p.m.
PWM
-
YYZ
1 stop8h 16m
Delta
Mon 16/116:00 a.m.
YYZ
-
PWM
1 stop7h 53m
Delta
Deal found 17/6C$ 640
Thu 29/106:00 a.m.
PWM
-
YYZ
1 stop7h 39m
Delta
Sat 7/1112:10 p.m.
YYZ
-
PWM
1 stop11h 39m
Delta
Deal found 16/6C$ 655
Tue 10/112:35 p.m.
PWM
-
YYZ
1 stop8h 16m
Delta
Thu 19/1112:05 p.m.
YYZ
-
PWM
1 stop7h 24m
Delta
Deal found 17/6C$ 665
Mon 2/115:59 p.m.
PWM
-
YYZ
1 stop15h 32m
Delta
Sat 7/1112:10 p.m.
YYZ
-
PWM
1 stop11h 39m
Delta
Deal found 16/6C$ 681
Wed 15/77:16 p.m.
PWM
-
YYZ
1 stop4h 38m
United Airlines
Wed 22/77:43 p.m.
YYZ
-
PWM
1 stop4h 08m
United Airlines
Deal found 17/6C$ 686
Mon 9/1111:25 a.m.
PWM
-
YYZ
1 stop9h 03m
Delta
Fri 20/1112:05 p.m.
YYZ
-
PWM
1 stop11h 01m
Delta
Deal found 17/6C$ 691
Fri 21/87:35 p.m.
PWM
-
YYZ
1 stop4h 19m
United Airlines
Mon 24/87:43 p.m.
YYZ
-
PWM
1 stop4h 16m
United Airlines
Deal found 16/6C$ 702
Fri 13/1110:00 a.m.
PWM
-
YYZ
1 stop12h 51m
Delta
Thu 19/116:15 a.m.
YYZ
-
PWM
1 stop10h 44m
Delta
Deal found 17/6C$ 708
Tue 3/112:35 p.m.
PWM
-
YYZ
1 stop8h 16m
Delta
Thu 5/116:00 a.m.
YYZ
-
PWM
1 stop7h 53m
Delta
Deal found 16/6C$ 710
Thu 12/118:00 a.m.
PWM
-
YYZ
1 stop15h 13m
Delta
Tue 17/116:00 a.m.
YYZ
-
PWM
1 stop7h 53m
Delta
Deal found 17/6C$ 713
Sun 8/116:30 a.m.
PWM
-
YYZ
1 stop4h 44m
Delta
Tue 17/116:00 a.m.
YYZ
-
PWM
1 stop7h 53m
Delta
Deal found 17/6C$ 722

Find flight deals from Portland to Ontario

Keep the following information in mind while searching for Portland to Ontario flight deals. Data was last updated 21 June 2026.

Round-trip from

C$ 620

One-way from

C$ 300
11/11-19/11
  • 11/11-19/11
  • 2 total stops
  • 39h 02m total
  • Portland to Ontario
Search Deals
American Airlines
  • American Airlines
  • 24/7
  • 1 total stop
  • 20h 23m total
  • Portland to Ontario
Search Deals

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 21 June 2026.
Use the filters below to find and compare flights from Portland to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 31/10

3:00 p.m.-10:31 a.m.

1 stop19h 31m

Toronto Pearson Intl

Tue 3/11

2:30 p.m.-11:49 p.m.

1 stop9h 19m

C$ 655

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Mon 9/11

11:25 a.m.-8:28 p.m.

1 stop9h 03m

Toronto Pearson Intl

Fri 20/11

12:05 p.m.-11:06 p.m.

1 stop11h 01m

C$ 691

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 29/8

6:00 a.m.-7:00 p.m.

1 stop13h 00m

Toronto Pearson Intl

Tue 1/9

11:00 a.m.-5:42 p.m.

1 stop6h 42m

C$ 702

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Wed 5/8

6:00 a.m.-1:42 p.m.

1 stop7h 42m

Toronto Pearson Intl

Wed 12/8

7:00 a.m.-2:34 p.m.

1 stop7h 34m

C$ 702
Quickest round-trip

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 14/7

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

1 stop5h 49m

Toronto Pearson Intl

Tue 21/7

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

1 stop4h 08m

C$ 702

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 16/7

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

1 stop5h 49m

Toronto Pearson Intl

Sat 18/7

2:35 p.m.-11:51 p.m.

1 stop9h 16m

C$ 702

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sun 8/11

6:30 a.m.-11:14 a.m.

1 stop4h 44m

Toronto Pearson Intl

Tue 17/11

6:00 a.m.-1:53 p.m.

1 stop7h 53m

C$ 722

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Mon 2/11

2:35 p.m.-10:51 p.m.

1 stop8h 16m

Toronto Pearson Intl

Wed 4/11

6:00 a.m.-1:53 p.m.

1 stop7h 53m

C$ 757

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Fri 24/7

12:51 p.m.-9:48 a.m.

2 stops20h 57m

Montreal Pierre Elliott Trudeau Intl

Tue 28/7

10:30 a.m.-12:11 p.m.

2 stops25h 41m

C$ 805

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Mon 13/7

5:15 a.m.-11:25 a.m.

1 stop6h 10m

Toronto Pearson Intl

Fri 17/7

2:00 p.m.-9:41 p.m.

1 stop7h 41m

C$ 824

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/6

Showing 1-10 of 39 resultsSorted by cheapest first
1
2
3
4

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
No data available for this route at this time. Please check back soon.

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, American Airlines, and United Airlines can get you from Portland, Maine to Region of Ontario in just under 12h 51m. Your travel time can differ by up to 8h 06m. The distance from Portland, Maine to Region of Ontario 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 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.

See more FAQs

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.

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 Portland to Ontario?

Cheapflights helps you search for flights from Portland to Ontario via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Portland to Ontario for you. Better yet — we are completely free to use.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portland to Ontario flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Portland to Ontario 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!

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.