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Cheap flights from Portland, ME to Ontario from C$ 314

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
31 Aug — 7 Sep1
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 1 August 2026.

Fri 21/86:02 a.m.
PWM
-
YYZ
1 stop10h 43m
American Airlines
Tue 25/811:01 a.m.
YYZ
-
PWM
1 stop12h 46m
American Airlines
Deal found 29/7C$ 669
Sat 29/85:30 a.m.
PWM
-
YYZ
1 stop10h 11m
American Airlines
Mon 31/811:01 a.m.
YYZ
-
PWM
1 stop12h 46m
American Airlines
Deal found 27/7C$ 673
Fri 21/86:02 a.m.
PWM
-
YYZ
1 stop10h 43m
American Airlines
Mon 24/82:15 p.m.
YYZ
-
PWM
1 stop9h 32m
American Airlines
Deal found 28/7C$ 684
Tue 3/113:10 p.m.
PWM
-
YYZ
1 stop6h 14m
United Airlines
Sat 7/1110:00 a.m.
YYZ
-
PWM
1 stop4h 27m
United Airlines
Deal found 27/7C$ 688
Fri 18/910:47 a.m.
PWM
-
YUL
1 stop23h 02m
American Airlines
Tue 22/910:30 a.m.
YUL
-
PWM
1 stop23h 47m
American Airlines
Deal found 27/7C$ 691
Thu 20/89:52 a.m.
PWM
-
YYZ
1 stop8h 53m
American Airlines
Sat 22/811:01 a.m.
YYZ
-
PWM
1 stop11h 14m
American Airlines
Deal found 28/7C$ 698
Wed 18/1111:40 a.m.
PWM
-
YYZ
1 stop4h 35m
WestJet
Fri 20/116:00 a.m.
YYZ
-
PWM
1 stop9h 58m
WestJet
Deal found 30/7C$ 718
Fri 11/96:00 a.m.
PWM
-
YYZ
1 stop7h 38m
American Airlines
Fri 18/911:02 a.m.
YYZ
-
PWM
1 stop12h 57m
American Airlines
Deal found 28/7C$ 723
Thu 27/86:46 p.m.
PWM
-
YYZ
1 stop5h 00m
American Airlines
Sun 30/82:15 p.m.
YYZ
-
PWM
1 stop9h 32m
American Airlines
Deal found 28/7C$ 726
Mon 24/85:13 p.m.
PWM
-
YUL
2 stops16h 33m
American Airlines
Mon 31/810:31 a.m.
YUL
-
PWM
1 stop22h 50m
American Airlines
Deal found 31/7C$ 736
Fri 21/87:35 p.m.
PWM
-
YYZ
1 stop4h 19m
United Airlines
Mon 7/92:30 p.m.
YYZ
-
PWM
1 stop4h 54m
United Airlines
Deal found 28/7C$ 740
Wed 9/95:05 p.m.
PWM
-
YUL
2 stops16h 44m
American Airlines
Wed 23/910:30 a.m.
YUL
-
PWM
2 stops13h 29m
American Airlines
Deal found 29/7C$ 775

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 1 August 2026.

Round-trip from

C$ 669

One-way from

C$ 314
American Airlines
  • American Airlines
  • 21/8-24/8
  • 2 total stops
  • 23h 29m total
  • Portland to Ontario
Search Deals
American Airlines
  • American Airlines
  • 4/9
  • 1 total stop
  • 23h 54m 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 1 August 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

Tue 3/11

3:10 p.m.-9:24 p.m.

1 stop6h 14m

Toronto Pearson Intl

Sat 7/11

10:00 a.m.-2:27 p.m.

1 stop4h 27m

C$ 688

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Sat 19/9

2:51 p.m.-9:49 a.m.

1 stop18h 58m

Montreal Pierre Elliott Trudeau Intl

Tue 22/9

10:30 a.m.-11:59 p.m.

2 stops13h 29m

C$ 725
Quickest round-trip

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 21/8

7:35 p.m.-11:54 p.m.

1 stop4h 19m

Toronto Pearson Intl

Mon 24/8

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

1 stop4h 16m

C$ 740

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 29/8

11:50 a.m.-12:45 p.m.

2 stops24h 55m

Toronto Pearson Intl

Mon 31/8

12:09 p.m.-12:02 p.m.

1 stop23h 53m

C$ 744

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Fri 18/9

6:00 a.m.-9:49 a.m.

2 stops27h 49m

Montreal Pierre Elliott Trudeau Intl

Tue 22/9

10:30 a.m.-11:59 p.m.

2 stops13h 29m

C$ 750

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Mon 24/8

5:13 p.m.-9:46 a.m.

2 stops16h 33m

Montreal Pierre Elliott Trudeau Intl

Mon 31/8

10:31 a.m.-9:21 a.m.

1 stop22h 50m

C$ 750

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 21/8

5:15 a.m.-10:04 a.m.

1 stop4h 49m

Toronto Pearson Intl

Mon 7/9

9:44 a.m.-2:38 p.m.

1 stop4h 54m

C$ 756

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 4/9

11:50 a.m.-1:05 a.m.

2 stops13h 15m

Toronto Pearson Intl

Mon 7/9

6:10 a.m.-12:02 p.m.

1 stop5h 52m

C$ 758

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Wed 9/9

5:05 p.m.-9:49 a.m.

2 stops16h 44m

Montreal Pierre Elliott Trudeau Intl

Wed 23/9

10:30 a.m.-11:59 p.m.

2 stops13h 29m

C$ 775

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Tue 15/9

4:31 p.m.-9:49 a.m.

1 stop17h 18m

Montreal Pierre Elliott Trudeau Intl

Sun 20/9

10:30 a.m.-10:17 a.m.

1 stop23h 47m

C$ 779

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/7

Showing 1-10 of 39 resultsSorted by cheapest first
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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?

    United Airlines, American Airlines, and WestJet can get you from Portland, Maine to Region of Ontario in just under 6h 14m. Your travel time can differ by up to 18h 41m. 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

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

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