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$219+ Cheap flights from Portland, ME (PWM) to Ontario

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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
Apr 16 — Apr 231
Thu 4/16
Thu 4/23
1 adult, Economy
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Cheap flight deals from Portland to Ontario

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 March 17, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/16. 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.
Fri 6/59:52 am
PWM
-
YYZ
1 stop10h 13m
Multiple Airlines
Sun 6/75:45 pm
YYZ
-
PWM
1 stop15h 27m
Multiple Airlines
Deal found 3/16$398
This American Airlines deal was found by Cheapflights users on 3/15. 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.
Wed 4/810:24 am
PWM
-
YYZ
1 stop12h 47m
American Airlines
Wed 4/157:15 am
YYZ
-
PWM
1 stop7h 54m
American Airlines
Deal found 3/15$406
This American Airlines deal was found by Cheapflights users on 3/13. 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.
Mon 4/273:39 pm
PWM
-
YYZ
1 stop7h 32m
American Airlines
Mon 5/47:25 pm
YYZ
-
PWM
1 stop14h 29m
American Airlines
Deal found 3/13$407
This American Airlines deal was found by Cheapflights users on 3/13. 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.
Sun 4/1210:24 am
PWM
-
YYZ
1 stop12h 47m
American Airlines
Sun 4/197:15 am
YYZ
-
PWM
1 stop9h 05m
American Airlines
Deal found 3/13$443
This American Airlines deal was found by Cheapflights users on 3/12. 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 4/910:24 am
PWM
-
YYZ
1 stop12h 47m
American Airlines
Thu 4/167:15 am
YYZ
-
PWM
1 stop7h 54m
American Airlines
Deal found 3/12$445
This American Airlines deal was found by Cheapflights users on 3/15. 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.
Thu 4/303:39 pm
PWM
-
YYZ
1 stop7h 32m
American Airlines
Sun 5/37:25 pm
YYZ
-
PWM
1 stop14h 29m
American Airlines
Deal found 3/15$454
This American Airlines deal was found by Cheapflights users on 3/12. 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.
Fri 4/1010:24 am
PWM
-
YYZ
1 stop8h 21m
American Airlines
Fri 4/177:15 am
YYZ
-
PWM
1 stop9h 25m
American Airlines
Deal found 3/12$481
This Delta deal was found by Cheapflights users on 3/12. 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.
Tue 4/215:26 pm
PWM
-
YUL
1 stop15h 14m
Delta
Tue 4/287:41 pm
YUL
-
PWM
1 stop15h 21m
Delta
Deal found 3/12$498
This American Airlines deal was found by Cheapflights users on 3/16. 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 8/111:14 pm
PWM
-
YYZ
1 stop9h 55m
American Airlines
Wed 8/262:25 pm
YYZ
-
PWM
1 stop9h 22m
American Airlines
Deal found 3/16$511
This American Airlines deal was found by Cheapflights users on 3/13. 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.
Wed 8/121:14 pm
PWM
-
YYZ
1 stop9h 55m
American Airlines
Fri 8/147:15 pm
YYZ
-
PWM
1 stop14h 03m
American Airlines
Deal found 3/13$517
This Delta deal was found by Cheapflights users on 3/12. 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.
Tue 4/215:26 pm
PWM
-
YUL
1 stop15h 14m
Delta
Mon 4/277:41 pm
YUL
-
PWM
1 stop15h 21m
Delta
Deal found 3/12$528
This Flysmarter deal was found by Cheapflights users on 3/14. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/46:00 am
PWM
-
YUL
1 stop7h 09m
Air Canada
Fri 4/106:00 am
YUL
-
PWM
1 stop7h 25m
Air Canada
Deal found 3/14$538

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 March 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$398
(Kiwi.com)

One-way from

$219
(American Airlines)
Provider with most accurate pricing for Portland-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Toronto (YTO) flights.
Search Deals
From Portland to Ontario
Search Deals
One-way flight from 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 2,558,603 searches. Data last updated March 17, 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

Wed 4/8

3:39 pm-11:11 pm

1 stop7h 32m

Toronto Pearson Intl

Wed 4/15

7:25 pm-9:54 am

1 stop14h 29m

$406

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sun 4/12

10:24 am-11:11 pm

1 stop12h 47m

Toronto Pearson Intl

Sun 4/19

7:15 am-4:20 pm

1 stop9h 05m

$443

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 4/14

3:39 pm-11:11 pm

1 stop7h 32m

Toronto Pearson Intl

Tue 4/21

7:15 am-3:09 pm

1 stop7h 54m

$445

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 4/10

10:24 am-6:45 pm

1 stop8h 21m

Toronto Pearson Intl

Fri 4/17

7:15 am-4:40 pm

1 stop9h 25m

$481

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Wed 8/12

1:14 pm-11:09 pm

1 stop9h 55m

Toronto Pearson Intl

Fri 8/14

7:15 pm-9:18 am

1 stop14h 03m

$517

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Mon 4/27

7:33 pm-12:13 am

1 stop4h 40m

Montreal Pierre Elliott Trudeau Intl

Mon 5/4

6:35 pm-11:59 pm

1 stop5h 24m

$556

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Thu 6/25

6:00 am-1:09 pm

1 stop7h 09m

Montreal Pierre Elliott Trudeau Intl

Sat 7/4

11:23 am-6:29 pm

1 stop7h 06m

$557

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 4/11

6:33 pm-9:54 am

1 stop15h 21m

Toronto Pearson Intl

Wed 4/15

11:00 am-5:32 pm

1 stop6h 32m

$562
Quickest round-trip

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 5/15

5:30 am-10:04 am

1 stop4h 34m

Toronto Pearson Intl

Wed 5/20

7:43 pm-11:59 pm

1 stop4h 16m

$562

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Sat 7/11

5:15 am-7:45 pm

1 stop14h 30m

Montreal Pierre Elliott Trudeau Intl

Wed 7/15

2:20 pm-11:51 pm

1 stop9h 31m

$577

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/13

Showing 1-10 of 23 resultsSorted by cheapest first
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3

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

What is the cheapest month to book a flight from Portland, Maine to Region of Ontario?

Currently, August is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of $125). Flying from Portland, Maine to Region of Ontario in December is currently the most expensive (average of $217). 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.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated March 17, 2026.
Read reviews from past customers who have flown American Airlines from Portland to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,468 reviews

Comfort

7.2

Food

6.4

Crew

7.9

Boarding

7.5

Overall

7.1

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes
American Airlines
7.1
Good
11,468 reviews
American Airlines
7.1
Good
11,468 reviews

Comfort

7.2

Food

6.4

Crew

7.9

Boarding

7.5

Overall

7.1

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes

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?

    For a flight from Portland to Ontario, you will be flying from Portland. Portland (PWM) is just 2.9 mi from the center of the city.

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

    Departing from Portland, Maine to Region of Ontario will take you 4h 40m. The distance from Portland, Maine to Region of Ontario is about 211 mi. When browsing for deals, the options you’ll see will be for both nonstop 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.

  • What is the cheapest month to book a flight from Portland, Maine to Region of Ontario?

    Currently, August is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of $125). Flying from Portland, Maine to Region of Ontario in December is currently the most expensive (average of $217). 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.

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