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$186+ 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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
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 December 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2011:16 amPWM - YYZ
1 stop11h 19mMultiple Airlines
Wed 12/317:10 amYYZ - PWM
2 stops51h 31mMultiple Airlines
Deal found 12/14$591
This United Airlines deal was found by Cheapflights users on 12/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:30 pmPWM - YYZ
1 stop4h 16mUnited Airlines
Sat 1/39:30 amYYZ - PWM
1 stop4h 09mUnited Airlines
Deal found 12/14$737
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/159:46 amPWM - YYZ
1 stop28h 34mMultiple Airlines
Mon 12/226:17 pmYYZ - PWM
2 stops15h 52mMultiple Airlines
Deal found 12/14$741
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/229:46 amPWM - YYZ
1 stop28h 34mMultiple Airlines
Sun 12/287:10 amYYZ - PWM
1 stop25h 56mMultiple Airlines
Deal found 12/14$758
This American Airlines deal was found by Cheapflights users on 12/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:00 amPWM - YYZ
1 stop5h 45mAmerican Airlines
Sun 12/287:30 amYYZ - PWM
1 stop15h 25mAmerican Airlines
Deal found 12/14$836
This American Airlines deal was found by Cheapflights users on 12/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:48 amPWM - YYZ
2 stops11h 41mAmerican Airlines
Sat 1/37:04 amYYZ - PWM
2 stops9h 32mAmerican Airlines
Deal found 12/14$885
This American Airlines deal was found by Cheapflights users on 12/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:00 amPWM - YYZ
1 stop5h 51mAmerican Airlines
Fri 12/2612:34 pmYYZ - PWM
1 stop5h 42mAmerican Airlines
Deal found 12/14$934
This FlightHub deal was found by Cheapflights users on 12/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/264:48 pmPWM - YUL
1 stop6h 31mWestJet
Sun 12/2812:50 pmYUL - PWM
1 stop23h 26mWestJet
Deal found 12/15$1,189
This American Airlines deal was found by Cheapflights users on 12/15. 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.
Fri 12/265:40 amPWM - YUL
2 stops17h 18mAmerican Airlines
Sun 12/2812:59 pmYUL - PWM
2 stops10h 46mAmerican Airlines
Deal found 12/15$1,208

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 December 16, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$409
(Kiwi.com)

One-way from

$186
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$367
Provider with most accurate pricing for Boston Logan Intl-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Toronto (YTO) flights.
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From Portland to Ontario
Search Deals
One-way flight from Portland to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 16, 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

Thu 1/29

11:01 am-11:54 pm

1 stop12h 53m

Toronto Pearson Intl

Thu 2/5

7:40 am-4:26 pm

2 stops32h 46m

$409

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 1/13

6:00 am-4:12 pm

1 stop10h 12m

Toronto Pearson Intl

Tue 1/20

6:00 am-1:45 pm

1 stop7h 45m

$427

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Thu 1/29

11:01 am-2:54 pm

1 stop27h 53m

Montreal Pierre Elliott Trudeau Intl

Thu 2/5

8:00 am-9:07 am

2 stops25h 07m

$440

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 1/23

5:07 pm-11:59 am

1 stop18h 52m

Toronto Pearson Intl

Sun 1/25

5:15 pm-12:06 pm

1 stop18h 51m

$448

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Wed 1/14

6:00 am-1:22 pm

1 stop7h 22m

Montreal Pierre Elliott Trudeau Intl

Wed 1/21

2:15 pm-11:22 pm

1 stop9h 07m

$472

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 1/8

6:00 am-4:12 pm

1 stop10h 12m

Toronto Pearson Intl

Wed 1/14

12:10 pm-11:22 pm

2 stops11h 12m

$479

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Wed 1/14

6:18 pm-12:35 am

2 stops30h 17m

Montreal Pierre Elliott Trudeau Intl

Wed 1/21

3:55 pm-10:21 am

1 stop18h 26m

$500

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Wed 1/14

5:20 am-10:59 pm

2 stops17h 39m

Montreal Pierre Elliott Trudeau Intl

Wed 1/21

12:59 pm-11:43 pm

2 stops10h 44m

$508

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 3/10

5:39 am-4:30 pm

1 stop10h 51m

Toronto Pearson Intl

Mon 3/23

5:22 pm-10:23 am

1 stop17h 01m

$509

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Mon 1/26

6:00 am-1:22 pm

1 stop7h 22m

Montreal Pierre Elliott Trudeau Intl

Thu 1/29

2:15 pm-11:22 pm

1 stop9h 07m

$510

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 29 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, April is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of $116). Flying from Portland, Maine to Region of Ontario in November is currently the most expensive (average of $191). 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 December 16, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 35% on flights from Portland, Maine to Region of Ontario by exploring options for tickets in the afternoon.

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 December 16, 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
11,048 reviews

Comfort

7.2

Crew

8.0

Overall

7.2

Food

6.5

Boarding

7.5

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit
American Airlines
7.2
Good
11,048 reviews
American Airlines
7.2
Good
11,048 reviews

Comfort

7.2

Crew

8.0

Overall

7.2

Food

6.5

Boarding

7.5

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit

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 10h 12m. 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, April is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of $116). Flying from Portland, Maine to Region of Ontario in November is currently the most expensive (average of $191). 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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