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$201+ 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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
Jun 4 — Jun 111
Thu 6/4
Thu 6/11
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 May 5, 2026.

This American Airlines deal was found by Cheapflights users on 5/3. 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 5/299:29 am
PWM
-
YYZ
1 stop9h 16m
American Airlines
Sun 5/317:25 pm
YYZ
-
PWM
1 stop13h 28m
American Airlines
Deal found 5/3$429
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Sat 5/3010:24 am
PWM
-
YUL
1 stop23h 32m
American Airlines
Sat 6/610:30 am
YUL
-
PWM
1 stop26h 09m
American Airlines
Deal found 5/2$449
This Delta deal was found by Cheapflights users on 4/30. 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.
Fri 7/176:25 am
PWM
-
YUL
1 stop12h 29m
Delta
Mon 7/277:44 pm
YUL
-
PWM
1 stop14h 37m
Delta
Deal found 4/30$450
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1011:07 am
PWM
-
YYZ
1 stop8h 58m
Multiple Airlines
Sun 6/149:50 am
YYZ
-
PWM
1 stop23h 22m
Multiple Airlines
Deal found 4/30$459
This American Airlines deal was found by Cheapflights users on 5/2. 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 6/121:36 pm
PWM
-
YYZ
1 stop9h 29m
American Airlines
Sun 6/1411:01 am
YYZ
-
PWM
1 stop12h 58m
American Airlines
Deal found 5/2$460
This American Airlines deal was found by Cheapflights users on 5/1. 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 6/11:35 pm
PWM
-
YUL
1 stop20h 15m
American Airlines
Mon 6/810:30 am
YUL
-
PWM
1 stop22h 23m
American Airlines
Deal found 5/1$467
This American Airlines deal was found by Cheapflights users on 5/3. 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 6/41:36 pm
PWM
-
YYZ
1 stop9h 29m
American Airlines
Sun 6/77:25 pm
YYZ
-
PWM
1 stop13h 28m
American Airlines
Deal found 5/3$468
This American Airlines deal was found by Cheapflights users on 5/3. 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 6/261:36 pm
PWM
-
YYZ
1 stop9h 29m
American Airlines
Sun 6/287:25 pm
YYZ
-
PWM
1 stop13h 57m
American Airlines
Deal found 5/3$470
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Thu 5/73:39 pm
PWM
-
YYZ
1 stop7h 32m
American Airlines
Wed 5/137:25 pm
YYZ
-
PWM
1 stop14h 29m
American Airlines
Deal found 4/29$474
This American Airlines deal was found by Cheapflights users on 5/1. 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 5/133:39 pm
PWM
-
YYZ
1 stop7h 32m
American Airlines
Sat 5/163:15 pm
YYZ
-
PWM
1 stop18h 39m
American Airlines
Deal found 5/1$475
This Delta deal was found by Cheapflights users on 4/30. 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.
Fri 7/176:25 am
PWM
-
YUL
1 stop7h 14m
Delta
Thu 7/307:44 pm
YUL
-
PWM
1 stop14h 37m
Delta
Deal found 4/30$480
This American Airlines deal was found by Cheapflights users on 5/1. 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 6/151:36 pm
PWM
-
YYZ
1 stop9h 29m
American Airlines
Mon 6/227:25 pm
YYZ
-
PWM
1 stop13h 57m
American Airlines
Deal found 5/1$486

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 May 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$429
(American Airlines)

One-way from

$201
(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 May 5, 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

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Wed 7/22

6:25 am-6:54 pm

1 stop12h 29m

Montreal Pierre Elliott Trudeau Intl

Thu 7/30

7:44 pm-10:21 am

1 stop14h 37m

$480

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 6/12

1:36 pm-11:05 pm

1 stop9h 29m

Toronto Pearson Intl

Fri 6/19

7:25 pm-9:53 am

1 stop14h 28m

$492

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Wed 6/17

11:02 am-6:54 pm

1 stop7h 52m

Montreal Pierre Elliott Trudeau Intl

Wed 6/24

9:30 am-4:49 pm

1 stop7h 19m

$501

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 8/21

9:52 am-11:35 pm

1 stop13h 43m

Toronto Pearson Intl

Mon 8/24

5:50 pm-9:19 pm

2 stops27h 29m

$531

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Wed 6/17

1:36 pm-9:50 am

1 stop20h 14m

Montreal Pierre Elliott Trudeau Intl

Wed 6/24

10:30 am-11:59 pm

2 stops13h 29m

$538

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Mon 6/1

1:35 pm-9:50 am

1 stop20h 15m

Montreal Pierre Elliott Trudeau Intl

Mon 6/8

10:30 am-11:59 pm

2 stops13h 29m

$540

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 8/4

10:01 am-11:13 pm

1 stop13h 12m

Toronto Pearson Intl

Wed 8/5

7:27 pm-9:21 am

1 stop13h 54m

$542

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 10/27

3:00 pm-11:13 pm

1 stop8h 13m

Toronto Pearson Intl

Sun 11/1

6:00 am-1:53 pm

1 stop7h 53m

$544
Quickest round-trip

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 5/15

7:10 pm-11:54 pm

1 stop4h 44m

Toronto Pearson Intl

Wed 5/20

2:30 pm-7:04 pm

1 stop4h 34m

$546

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 6/6

8:16 pm-9:19 am

1 stop13h 03m

Toronto Pearson Intl

Wed 6/10

2:30 pm-7:27 pm

1 stop4h 57m

$547

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

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.

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 May 5, 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
11,670 reviews

Overall

7.1

Food

6.4

Comfort

7.2

Boarding

7.5

Entertainment

6.9

Crew

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!
American Airlines
7.1
Good
11,670 reviews
American Airlines
7.1
Good
11,670 reviews

Overall

7.1

Food

6.4

Comfort

7.2

Boarding

7.5

Entertainment

6.9

Crew

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!

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 44m. The distance from Portland, Maine to Region of Ontario is about 465 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.

See more FAQs

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