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$147+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Portland to Ontario

Keep the following information in mind while searching for Portland to Ontario flight deals. Data was last updated September 11, 2025.

Round-trip from

$322
(Kiwi.com)

One-way from

$147
(American Airlines)

Popular in

June

Cheapest in

March

Average price

$557
From Portland to Ontario
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One-way flight from Portland to Ontario
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Highest demand for flights based on searches. 14% potential increase in price ($83 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Tue 10/286:29 pmPWM - YYZ
1 stop20h 25mMultiple Airlines
Thu 10/305:15 pmYYZ - PWM
1 stop15h 51mMultiple Airlines
Deal found 9/9$318
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sun 12/711:58 amPWM - YYZ
1 stop26h 56mMultiple Airlines
Thu 12/115:15 pmYYZ - PWM
1 stop15h 51mMultiple Airlines
Deal found 9/9$322
This American Airlines deal was found by Cheapflights users on 9/9. 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 10/48:40 amPWM - YYZ
1 stop9h 55mAmerican Airlines
Sat 10/117:15 amYYZ - PWM
1 stop10h 23mAmerican Airlines
Deal found 9/9$329
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sat 9/273:21 pmPWM - YYZ
1 stop8h 20mMultiple Airlines
Sat 10/44:20 pmYYZ - PWM
1 stop24h 40mMultiple Airlines
Deal found 9/9$335
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sat 12/611:16 amPWM - YYZ
1 stop12h 55mMultiple Airlines
Wed 12/107:35 amYYZ - PWM
1 stop27h 43mMultiple Airlines
Deal found 9/9$339
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/246:05 pmPWM - YYZ
2 stops20h 20mMultiple Airlines
Sun 10/268:00 pmYYZ - PWM
1 stop13h 06mMultiple Airlines
Deal found 9/9$341
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sat 12/611:16 amPWM - YYZ
1 stop12h 55mMultiple Airlines
Tue 12/97:15 amYYZ - PWM
1 stop27h 21mMultiple Airlines
Deal found 9/9$343
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 9/243:21 pmPWM - YYZ
1 stop25h 15mMultiple Airlines
Tue 9/307:15 amYYZ - PWM
1 stop27h 31mMultiple Airlines
Deal found 9/9$345
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sat 12/611:16 amPWM - YYZ
1 stop12h 55mMultiple Airlines
Sun 12/78:00 pmYYZ - PWM
1 stop13h 06mMultiple Airlines
Deal found 9/9$354
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 12/311:16 amPWM - YYZ
1 stop12h 55mMultiple Airlines
Wed 12/107:35 amYYZ - PWM
1 stop27h 43mMultiple Airlines
Deal found 9/9$361
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sat 12/611:16 amPWM - YYZ
1 stop12h 55mMultiple Airlines
Thu 12/118:30 pmYYZ - PWM
2 stops20h 55mMultiple Airlines
Deal found 9/9$362
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 12/311:16 amPWM - YYZ
1 stop12h 55mMultiple Airlines
Tue 12/97:15 amYYZ - PWM
1 stop27h 21mMultiple Airlines
Deal found 9/9$366

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 September 11, 2025.
Use the filters below to find and compare flights from Portland to Ontario that are best for you.

Fly from

Portland

Fly to

Ontario

Route

Depart

Return

Price

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 10/24

7:00 am-11:02 pm

1 stop16h 02m

Toronto Pearson Intl

Sun 10/26

10:45 am-8:14 pm

1 stop9h 29m

$329

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 10/17

7:00 am-2:44 pm

1 stop7h 44m

Toronto Pearson Intl

Sun 10/19

12:46 pm-8:14 pm

1 stop7h 28m

$329

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 12/6

11:16 am-12:11 am

1 stop12h 55m

Toronto Pearson Intl

Wed 12/10

7:35 am-11:18 am

1 stop27h 43m

$339

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 10/24

6:05 pm-2:25 pm

2 stops20h 20m

Toronto Pearson Intl

Sun 10/26

8:00 pm-9:06 am

1 stop13h 06m

$341

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 12/6

11:16 am-12:11 am

1 stop12h 55m

Toronto Pearson Intl

Tue 12/9

7:15 am-10:36 am

1 stop27h 21m

$343

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Wed 9/24

3:21 pm-4:36 pm

1 stop25h 15m

Toronto Pearson Intl

Tue 9/30

7:15 am-10:46 am

1 stop27h 31m

$345

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 12/6

11:16 am-12:11 am

1 stop12h 55m

Toronto Pearson Intl

Sun 12/7

8:00 pm-9:06 am

1 stop13h 06m

$354

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Wed 12/3

11:16 am-12:11 am

1 stop12h 55m

Toronto Pearson Intl

Thu 12/11

5:15 pm-9:06 am

1 stop15h 51m

$367

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 12/5

6:05 pm-9:19 pm

2 stops27h 14m

Toronto Pearson Intl

Thu 12/11

5:15 pm-9:06 am

1 stop15h 51m

$374

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Wed 10/1

6:00 am-1:39 pm

1 stop7h 39m

Toronto Pearson Intl

Wed 10/8

6:00 am-12:05 am

1 stop18h 05m

$376

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 35 results
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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

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

Currently, January is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of $243). Flying from Portland, Maine to Region of Ontario in August is currently the most expensive (average of $348). 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.

What is the cheapest time of day to fly from PWM to ON?

Find hourly flight availability from Portland to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

When flying from Portland, Maine to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 11, 2025.
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
7.2
Good
10,000 reviews

Crew

8.0

Overall

7.2

Entertainment

6.9

Comfort

7.2

Food

6.4

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Crew

8.0

Overall

7.2

Entertainment

6.9

Comfort

7.2

Food

6.4

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

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 16h 02m. 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.

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

    Currently, January is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of $243). Flying from Portland, Maine to Region of Ontario in August is currently the most expensive (average of $348). 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.

See more FAQs

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