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Ontario

$166+ 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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
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 January 28, 2026.

This American Airlines deal was found by Cheapflights users on 1/26. 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 2/245:40 pm
PWM
-
YYZ
1 stop17h 19m
American Airlines
Sat 2/286:00 am
YYZ
-
PWM
1 stop11h 27m
American Airlines
Deal found 1/26$428
This American Airlines deal was found by Cheapflights users on 1/27. 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 2/275:40 pm
PWM
-
YYZ
1 stop17h 19m
American Airlines
Sat 3/216:00 am
YYZ
-
PWM
1 stop17h 34m
American Airlines
Deal found 1/27$437
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 2/235:06 pm
PWM
-
YYZ
2 stops31h 08m
Multiple Airlines
Tue 3/37:15 am
YYZ
-
PWM
1 stop27h 02m
Multiple Airlines
Deal found 1/28$456
This American Airlines deal was found by Cheapflights users on 1/27. 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 2/285:57 pm
PWM
-
YYZ
1 stop17h 01m
American Airlines
Tue 3/31:55 pm
YYZ
-
PWM
2 stops9h 55m
American Airlines
Deal found 1/27$498
This American Airlines deal was found by Cheapflights users on 1/25. 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 4/235:44 am
PWM
-
YYZ
1 stop11h 01m
American Airlines
Sun 4/267:29 pm
YYZ
-
PWM
1 stop14h 25m
American Airlines
Deal found 1/25$515
This American Airlines deal was found by Cheapflights users on 1/26. 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 2/255:40 pm
PWM
-
YYZ
1 stop17h 18m
American Airlines
Wed 3/41:55 pm
YYZ
-
PWM
2 stops9h 55m
American Airlines
Deal found 1/26$527
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/76:18 pm
PWM
-
YYZ
1 stop27h 01m
Multiple Airlines
Tue 2/105:15 pm
YYZ
-
PWM
1 stop17h 02m
Multiple Airlines
Deal found 1/27$532
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 1/3111:02 am
PWM
-
YYZ
1 stop27h 18m
Multiple Airlines
Mon 2/23:40 pm
YYZ
-
PWM
2 stops42h 37m
Multiple Airlines
Deal found 1/27$537
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/69:47 am
PWM
-
YYZ
1 stop28h 33m
Multiple Airlines
Tue 2/1011:15 am
YYZ
-
PWM
2 stops23h 02m
Multiple Airlines
Deal found 1/27$561
This Rumbo deal was found by Cheapflights users on 1/28. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/235:59 pm
PWM
-
YYZ
1 stop4h 52m
WestJet
Tue 3/312:11 pm
YYZ
-
PWM
1 stop23h 49m
WestJet
Deal found 1/28$567
This American Airlines deal was found by Cheapflights users on 1/26. 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 3/116:00 am
PWM
-
YUL
2 stops16h 56m
American Airlines
Wed 3/187:30 am
YUL
-
PWM
2 stops16h 25m
American Airlines
Deal found 1/26$569
This United Airlines deal was found by Cheapflights users on 1/26. 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.
Fri 3/1311:30 am
PWM
-
YUL
2 stops20h 11m
United Airlines
Fri 3/208:00 pm
YUL
-
PWM
2 stops19h 14m
United Airlines
Deal found 1/26$575

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 January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$428
(American Airlines)

One-way from

$166
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$760
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
Highest demand for flights based on searches. 27% potential increase in price ($225 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 28, 2026.
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

Wed 2/25

5:40 pm-10:58 am

1 stop17h 18m

Toronto Pearson Intl

Wed 3/4

6:00 am-5:07 pm

1 stop11h 07m

$428

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 2/24

5:40 pm-10:59 am

1 stop17h 19m

Toronto Pearson Intl

Sat 2/28

6:00 am-5:27 pm

1 stop11h 27m

$428

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 3/13

6:17 am-4:03 pm

1 stop9h 46m

Toronto Pearson Intl

Fri 3/20

1:10 pm-11:34 pm

1 stop10h 24m

$437

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 2/28

5:57 pm-10:58 am

1 stop17h 01m

Toronto Pearson Intl

Tue 3/3

1:55 pm-11:50 pm

2 stops9h 55m

$498

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 4/23

5:44 am-4:45 pm

1 stop11h 01m

Toronto Pearson Intl

Sun 4/26

7:29 pm-9:54 am

1 stop14h 25m

$515

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 2/7

6:18 pm-9:19 pm

1 stop27h 01m

Toronto Pearson Intl

Tue 2/10

5:15 pm-10:17 am

1 stop17h 02m

$532

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sun 3/1

5:40 pm-10:58 am

1 stop17h 18m

Toronto Pearson Intl

Wed 3/4

6:00 am-5:07 pm

1 stop11h 07m

$538

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Mon 2/23

5:59 pm-10:51 pm

1 stop4h 52m

Toronto Pearson Intl

Tue 3/3

12:11 pm-12:00 pm

1 stop23h 49m

$567

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Wed 3/11

6:00 am-10:56 pm

2 stops16h 56m

Montreal Pierre Elliott Trudeau Intl

Wed 3/18

7:30 am-11:55 pm

2 stops16h 25m

$569

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Fri 3/13

11:30 am-7:41 am

2 stops20h 11m

Montreal Pierre Elliott Trudeau Intl

Fri 3/20

8:00 pm-3:14 pm

2 stops19h 14m

$575

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 38 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, March is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of $117). 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 January 28, 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
7.2
Good
11,201 reviews

Comfort

7.2

Crew

8.0

Boarding

7.5

Entertainment

6.9

Food

6.4

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
American Airlines
7.2
Good
11,201 reviews
American Airlines
7.2
Good
11,201 reviews

Comfort

7.2

Crew

8.0

Boarding

7.5

Entertainment

6.9

Food

6.4

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.

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 17h 18m. 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, March is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of $117). 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.

See more FAQs

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