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$116+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — YYZ
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 July 29, 2025.

Round-trip from

$277
(Air Canada)

One-way from

$116
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$388
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. 15% potential increase in price ($83 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 July 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 July 29, 2025.

This Air Canada deal was found by Cheapflights users on 7/29. 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 9/267:40 pmPDX - YYZ
1 stop9h 19mAir Canada
Mon 9/298:30 amYYZ - PDX
1 stop9h 16mAir Canada
Deal found 7/29$277
This Air Canada deal was found by Cheapflights users on 7/29. 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 9/127:40 pmPDX - YTZ
2 stops13h 05mAir Canada
Fri 9/194:10 pmYTZ - PDX
2 stops9h 51mAir Canada
Deal found 7/29$281
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:22 pmPDX - YYZ
2 stops22h 30mMultiple Airlines
Mon 9/299:45 amYYZ - PDX
1 stop11h 42mMultiple Airlines
Deal found 7/26$285
This Trip.com deal was found by Cheapflights users on 7/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/261:45 pmPDX - YYZ
1 stop7h 39mWestJet
Tue 9/28:00 amYYZ - PDX
1 stop7h 48mWestJet
Deal found 7/28$289
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2810:05 amPDX - YUL
1 stop7h 45mAir Canada
Sat 9/66:00 pmYUL - PDX
1 stop8h 01mAir Canada
Deal found 7/27$301
This Trip.com deal was found by Cheapflights users on 7/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/21:45 pmPDX - YOW
1 stop14h 00mWestJet
Sat 9/206:00 amYOW - PDX
1 stop10h 05mWestJet
Deal found 7/28$319
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Sat 8/1610:55 pmPDX - YYZ
1 stop8h 03mUnited Airlines
Sat 8/237:00 pmYYZ - PDX
1 stop16h 51mUnited Airlines
Deal found 7/27$328
This American Airlines deal was found by Cheapflights users on 7/29. 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 9/102:05 pmPDX - YYZ
1 stop19h 25mAmerican Airlines
Tue 9/1611:00 amYYZ - PDX
2 stops10h 54mAmerican Airlines
Deal found 7/29$331
This Delta deal was found by Cheapflights users on 7/26. 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 8/3010:05 pmPDX - YYZ
1 stop11h 05mDelta
Thu 9/46:04 amYYZ - PDX
1 stop8h 56mDelta
Deal found 7/26$341
This Air Canada deal was found by Cheapflights users on 7/28. 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.
Sat 9/67:40 pmPDX - YOW
1 stop9h 43mAir Canada
Sat 9/206:00 pmYOW - PDX
1 stop8h 01mAir Canada
Deal found 7/28$341
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Fri 11/78:20 amPDX - YOW
1 stop12h 34mUnited Airlines
Tue 11/1111:10 amYOW - PDX
1 stop14h 23mUnited Airlines
Deal found 7/27$350
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/37:52 pmPDX - YTZ
2 stops13h 25mMultiple Airlines
Fri 9/52:45 pmYTZ - PDX
3 stops25h 20mMultiple Airlines
Deal found 7/27$354

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 July 29, 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

Fri 9/26

7:40 pm-7:59 am

1 stop9h 19m

Toronto Pearson Intl

Mon 9/29

8:30 am-2:46 pm

1 stop9h 16m

$277

PortlandToronto

PDX - YTZ

PDXYTZ

Portland

Fri 9/12

7:40 pm-11:45 am

2 stops13h 05m

Toronto Island

Fri 9/19

4:10 pm-11:01 pm

2 stops9h 51m

$281

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 9/25

7:22 pm-8:52 pm

2 stops22h 30m

Toronto Pearson Intl

Mon 9/29

9:45 am-6:27 pm

1 stop11h 42m

$285

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Tue 8/26

1:45 pm-12:24 am

1 stop7h 39m

Toronto Pearson Intl

Tue 9/2

8:00 am-12:48 pm

1 stop7h 48m

$289

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Thu 8/28

10:05 am-8:50 pm

1 stop7h 45m

Montreal Pierre Elliott Trudeau Intl

Sat 9/6

6:00 pm-11:01 pm

1 stop8h 01m

$301

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Tue 9/2

1:45 pm-6:45 am

1 stop14h 00m

Ottawa

Sat 9/20

6:00 am-1:05 pm

1 stop10h 05m

$319

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sat 8/16

10:55 pm-9:58 am

1 stop8h 03m

Toronto Pearson Intl

Sat 8/23

7:00 pm-8:51 am

1 stop16h 51m

$328

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Wed 9/10

2:05 pm-12:30 pm

1 stop19h 25m

Toronto Pearson Intl

Tue 9/16

11:00 am-6:54 pm

2 stops10h 54m

$331

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sat 8/30

10:05 pm-12:10 pm

1 stop11h 05m

Toronto Pearson Intl

Thu 9/4

6:04 am-12:00 pm

1 stop8h 56m

$341

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Sat 9/6

7:40 pm-8:23 am

1 stop9h 43m

Ottawa

Sat 9/20

6:00 pm-11:01 pm

1 stop8h 01m

$341

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 34 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, January is the cheapest month in which you can book a flight from Portland to Region of Ontario (average of $243). Flying from Portland 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 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 July 29, 2025.

When flying from Portland 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 July 29, 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
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,977 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,899 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
WestJet
7.2
Good
2,973 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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.

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

    $132 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $136 and $147, 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, January is the cheapest month in which you can book a flight from Portland to Region of Ontario (average of $243). Flying from Portland 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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Alternative routes for Portland to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Vancouver Intl flights
Portland to Pearson Intl flights
Portland to Calgary flights
Portland to Pierre Elliott Trudeau Intl flights
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Portland to Fredericton flights
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Portland to Kamloops flights
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Eugene to Ottawa flights
Boise to Halifax flights
Medford to Pierre Elliott Trudeau Intl flights
Medford to Ottawa flights
Eugene to Pierre Elliott Trudeau Intl flights
Portland to Williams Lake flights
Boise to Québec City flights
Portland to Yellowknife flights
Redmond to Halifax flights
Yakima to Edmonton 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$154Average$589FlexibilityNo cancel feeOn-time67%
WestJetCheapest$214Average$391FlexibilityNo cancel feeOn-time60%
DeltaCheapest$229Average$450FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$296Average$561FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$298Average$427FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$352Average$460FlexibilityNo cancel feeOn-time75%

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