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$145+ 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
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 April 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$346
(Delta)

One-way from

$145
(United Airlines)

Popular in

November

Cheapest in

September

Average price

$538
Provider with most accurate pricing for Portland-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Portland-Toronto (YTO) flights.
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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. 0% potential increase in price ($2 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 2, 2025.

This Delta deal was found by Cheapflights users on 4/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/167:00 amPWM - YYZ
1 stop8h 09mDelta
Fri 4/183:59 pmYYZ - PWM
1 stop7h 15mDelta
Deal found 4/1$346
This American Airlines deal was found by Cheapflights users on 4/1. 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 4/166:00 amPWM - YYZ
2 stops8h 35mAmerican Airlines
Fri 4/183:25 pmYYZ - PWM
1 stop5h 40mAmerican Airlines
Deal found 4/1$355
This Justfly.com deal was found by Cheapflights users on 4/1. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/2011:44 amPWM - YYZ
1 stop6h 50mMultiple Airlines
Mon 6/235:30 pmYYZ - PWM
1 stop5h 57mMultiple Airlines
Deal found 4/1$365
This United Airlines deal was found by Cheapflights users on 3/31. 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.
Thu 5/156:55 pmPWM - YYZ
2 stops12h 55mUnited Airlines
Thu 5/227:47 pmYYZ - PWM
1 stop4h 10mUnited Airlines
Deal found 3/31$379
This Delta deal was found by Cheapflights users on 3/31. 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 5/166:05 amPWM - YUL
1 stop4h 00mDelta
Fri 5/235:00 pmYUL - PWM
1 stop6h 21mDelta
Deal found 3/31$402
This WestJet deal was found by Cheapflights users on 4/1. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/165:30 pmPWM - YYZ
1 stop5h 24mWestJet
Fri 5/233:50 pmYYZ - PWM
1 stop24h 13mWestJet
Deal found 4/1$421
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/169:30 pmPWM - YUL
1 stop16h 50mMultiple Airlines
Fri 5/236:45 amYUL - PWM
2 stops9h 18mMultiple Airlines
Deal found 4/1$497
This American Airlines deal was found by Cheapflights users on 4/1. 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 5/122:05 pmPWM - YUL
2 stops19h 45mAmerican Airlines
Fri 5/165:35 pmYUL - PWM
2 stops23h 16mAmerican Airlines
Deal found 4/1$500
This Air Canada deal was found by Cheapflights users on 3/31. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/76:10 amPWM - YYZ
2 stops9h 24mAir Canada
Sun 6/812:05 pmYYZ - PWM
2 stops11h 23mAir Canada
Deal found 3/31$570
This lastminute.com deal was found by Cheapflights users on 3/31. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/166:05 amPWM - YUL
2 stops18h 32mWestJet
Fri 5/235:05 pmYUL - PWM
1 stop22h 58mWestJet
Deal found 3/31$623

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 April 2, 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

Wed 4/16

7:00 am-3:09 pm

1 stop8h 09m

Toronto Pearson Intl

Fri 4/18

3:59 pm-11:14 pm

1 stop7h 15m

$346

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Wed 4/16

6:00 am-2:35 pm

2 stops8h 35m

Toronto Pearson Intl

Fri 4/18

3:25 pm-9:05 pm

1 stop5h 40m

$355

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 6/20

11:44 am-6:34 pm

1 stop6h 50m

Toronto Pearson Intl

Mon 6/23

5:30 pm-11:27 pm

1 stop5h 57m

$365

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 5/15

6:55 pm-7:50 am

2 stops12h 55m

Toronto Pearson Intl

Thu 5/22

7:47 pm-11:57 pm

1 stop4h 10m

$379

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Fri 5/16

6:05 am-10:05 am

1 stop4h 00m

Montreal Pierre Elliott Trudeau Intl

Fri 5/23

5:00 pm-11:21 pm

1 stop6h 21m

$402

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 5/16

5:30 pm-10:54 pm

1 stop5h 24m

Toronto Pearson Intl

Fri 5/23

3:50 pm-4:03 pm

1 stop24h 13m

$421

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Fri 5/16

9:30 pm-2:20 pm

1 stop16h 50m

Montreal Pierre Elliott Trudeau Intl

Fri 5/23

6:45 am-4:03 pm

2 stops9h 18m

$497

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Mon 5/12

2:05 pm-9:50 am

2 stops19h 45m

Montreal Pierre Elliott Trudeau Intl

Fri 5/16

5:35 pm-4:51 pm

2 stops23h 16m

$500

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 6/7

6:10 am-3:34 pm

2 stops9h 24m

Toronto Pearson Intl

Sun 6/8

12:05 pm-11:28 pm

2 stops11h 23m

$570

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Fri 5/16

6:05 am-12:37 am

2 stops18h 32m

Montreal Pierre Elliott Trudeau Intl

Fri 5/23

5:05 pm-4:03 pm

1 stop22h 58m

$623

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 16 results
1
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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 July is currently the most expensive (average of $359). 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 April 2, 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

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 April 2, 2025.
Read reviews from past customers who have flown Delta, United Airlines and American Airlines from Portland to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,615 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,789 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.0
Good
9,022 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines to fly from Portland, Maine to Region of Ontario one-way?

    One-way options have recently been found by users for as low as $145 on United Airlines. Other airlines that offer cheap prices include American Airlines from $146 and WestJet from $260 one-way.

  • 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 July is currently the most expensive (average of $359). 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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Alternative routes for Portland to Ontario

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Top airline flying from Portland to Ontario

Discover the top airline that operate flights from Portland to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$247Average$379FlexibilityNo cancel feeOn-time71%

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