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$133+ Cheap flights from Portland (PDX) 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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — YYZ
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$317
(United Airlines)

One-way from

$133
(Alaska Airlines)

Popular in

March

Cheapest in

August

Average price

$359
Provider with most accurate pricing for Portland-Toronto (YTO) flight deals.
Search Deals
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
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($63 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 28, 2025.

This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1111:12 pmPDX - YYZ
1 stop9h 36mUnited Airlines
Wed 11/123:45 pmYYZ - PDX
1 stop10h 00mUnited Airlines
Deal found 10/27$317
This Air Canada deal was found by Cheapflights users on 10/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/129:50 amPDX - YYZ
1 stop8h 04mAir Canada
Wed 11/199:00 amYYZ - PDX
1 stop8h 40mAir Canada
Deal found 10/27$326
This Air Canada deal was found by Cheapflights users on 10/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/263:15 pmPDX - YYZ
2 stops11h 23mAir Canada
Wed 12/38:15 amYYZ - PDX
2 stops9h 25mAir Canada
Deal found 10/28$336
This Air Canada deal was found by Cheapflights users on 10/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:15 pmPDX - YYZ
2 stops11h 23mAir Canada
Sun 12/78:00 amYYZ - PDX
2 stops9h 40mAir Canada
Deal found 10/27$339
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:00 amPDX - YYZ
1 stop7h 02mUnited Airlines
Sun 12/76:30 amYYZ - PDX
1 stop19h 22mUnited Airlines
Deal found 10/28$341
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:00 amPDX - YYZ
1 stop7h 02mUnited Airlines
Wed 1/711:00 amYYZ - PDX
2 stops13h 12mUnited Airlines
Deal found 10/28$350
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/115:00 amPDX - YYZ
2 stops13h 24mUnited Airlines
Wed 12/176:10 amYYZ - PDX
2 stops19h 42mUnited Airlines
Deal found 10/28$355
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Sun 11/911:59 pmPDX - YUL
1 stop11h 01mUnited Airlines
Thu 11/202:13 pmYUL - PDX
1 stop9h 16mUnited Airlines
Deal found 10/26$368
This Delta deal was found by Cheapflights users on 10/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1912:35 amPDX - YUL
2 stops13h 46mDelta
Tue 11/2512:50 pmYUL - PDX
1 stop12h 15mDelta
Deal found 10/28$411
This Delta deal was found by Cheapflights users on 10/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1912:35 amPDX - YUL
2 stops13h 46mDelta
Sun 11/237:10 amYUL - PDX
2 stops14h 17mDelta
Deal found 10/28$417
This Air Canada deal was found by Cheapflights users on 10/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/259:50 amPDX - YUL
1 stop8h 10mAir Canada
Tue 12/27:30 amYUL - PDX
1 stop10h 10mAir Canada
Deal found 10/28$428
This Delta deal was found by Cheapflights users on 10/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/812:35 amPDX - YUL
2 stops10h 04mDelta
Thu 11/2012:45 pmYUL - PDX
1 stop12h 36mDelta
Deal found 10/26$442

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 October 28, 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

PDX - YYZ

PDXYYZ

Portland

Sat 1/10

6:00 am-3:35 pm

1 stop6h 35m

Toronto Pearson Intl

Sat 1/24

4:45 pm-10:46 pm

1 stop9h 01m

$321

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 2/19

6:00 am-3:35 pm

1 stop6h 35m

Toronto Pearson Intl

Mon 2/23

4:45 pm-10:26 pm

1 stop8h 41m

$321

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sun 12/7

5:00 am-3:02 pm

1 stop7h 02m

Toronto Pearson Intl

Fri 12/12

12:00 pm-6:30 pm

2 stops9h 30m

$336

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Tue 4/7

2:14 pm-9:55 am

1 stop16h 41m

Toronto Pearson Intl

Wed 4/8

12:45 pm-7:31 pm

1 stop9h 46m

$339

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Wed 1/7

11:05 pm-1:43 pm

1 stop11h 38m

Toronto Pearson Intl

Sun 1/11

8:00 am-2:40 pm

2 stops9h 40m

$339

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Fri 12/5

5:00 am-3:02 pm

1 stop7h 02m

Toronto Pearson Intl

Sun 12/7

6:30 am-10:52 pm

1 stop19h 22m

$341

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 1/8

5:00 am-3:02 pm

1 stop7h 02m

Toronto Pearson Intl

Sun 1/11

2:57 pm-9:49 pm

1 stop9h 52m

$341

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sun 12/7

11:28 pm-11:48 am

1 stop9h 20m

Toronto Pearson Intl

Fri 12/12

4:10 pm-9:15 pm

1 stop8h 05m

$341

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Wed 1/7

5:00 am-3:02 pm

1 stop7h 02m

Toronto Pearson Intl

Sun 1/11

2:57 pm-9:49 pm

1 stop9h 52m

$341

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sat 12/6

11:21 pm-11:48 am

1 stop9h 27m

Toronto Pearson Intl

Tue 12/9

6:50 am-11:48 am

1 stop7h 58m

$341

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 60 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 to Region of Ontario?

Currently, December is the cheapest month in which you can book a flight from Portland to Region of Ontario (average of $90). Flying from Portland to Region of Ontario in February is currently the most expensive (average of $381). 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 PDX 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 October 28, 2025.

One of the essential ways to save on airfare from Portland to Region of Ontario is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 36% on airfare.

What is the cheapest day to fly from Portland to Region of Ontario?

Use this chart to determine the cheapest time to fly round-trip from Portland to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Portland to Region of Ontario flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 28, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and United Airlines from Portland to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,199 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Alaska Airlines
8.0
Very good
11,199 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Delta
7.9
Good
7,995 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
United Airlines
7.4
Good
8,996 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
WestJet
7.2
Good
3,148 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Air Canada
7.1
Good
10,370 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

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?

    Located just 6.0 mi from the city center, Portland (PDX) is the airport most travelers will use when flying to Ontario from Portland.

  • How long is the flight from Portland to Region of Ontario?

    Alaska Airlines, United Airlines, and Delta can get you from Portland to Region of Ontario in just under 6h 35m. Your travel time can differ by up to 10h 06m. There are 2090 mi between Portland and Region of Ontario. This flight may include one or multiple stops.

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

    $133 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Air Canada and Delta, with prices starting from $138 and $177, respectively.

  • What are the most popular routes from Portland to Region of Ontario?

    While some choose either Portland - Montreal Pierre Elliott Trudeau Intl or Portland - Toronto Island, Portland - Toronto Pearson Intl is the most popular route from Portland to Region of Ontario.

  • 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 to Region of Ontario?

    Currently, December is the cheapest month in which you can book a flight from Portland to Region of Ontario (average of $90). Flying from Portland to Region of Ontario in February is currently the most expensive (average of $381). 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

See prices for flight routes from nearby airports that may be better suited for you.
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Eugene to Ottawa flights
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Portland to Fredericton flights
Portland to Regina flights
Redmond to Halifax flights
Portland to Kamloops flights
Yakima to Edmonton flights
Portland to Whitehorse flights
Portland to Williams Lake flights
Medford to Hamilton flights
Boise to Hamilton flights
Yakima to Vancouver Intl flights

Top 6 airlines flying from Portland to Ontario

Discover the top 6 airlines 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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$209Average$427FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$214Average$437FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$276Average$615FlexibilityNo cancel feeOn-time67%
Alaska AirlinesCheapest$313Average$452FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$321Average$552FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$321Average$583FlexibilityNo cancel feeOn-time69%

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