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Cheap flights from Portland to Ontario from C$ 159

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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — YYZ
11 Aug — 18 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portland to Ontario

Enter your travel dates to find the best prices.

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 12 July 2026.

Fri 28/87:45 p.m.
PDX
-
YYZ
2 stops9h 40m
Air Canada
Fri 4/911:35 p.m.
YYZ
-
PDX
2 stops12h 56m
Air Canada
Deal found 9/7C$ 399
Mon 31/83:30 p.m.
PDX
-
YYZ
2 stops12h 14m
Air Canada
Mon 7/911:35 p.m.
YYZ
-
PDX
2 stops12h 56m
Air Canada
Deal found 7/7C$ 402
Thu 1/103:30 p.m.
PDX
-
YYZ
2 stops11h 11m
Air Canada
Fri 2/107:55 a.m.
YYZ
-
PDX
2 stops9h 56m
Air Canada
Deal found 8/7C$ 409
Thu 1/1010:33 p.m.
PDX
-
YYZ
1 stop17h 27m
United Airlines
Fri 2/109:00 p.m.
YYZ
-
PDX
1 stop17h 33m
United Airlines
Deal found 7/7C$ 415
Wed 11/117:10 p.m.
PDX
-
YYZ
1 stop8h 52m
Air Canada
Wed 18/118:45 a.m.
YYZ
-
PDX
1 stop8h 56m
Air Canada
Deal found 8/7C$ 427
Thu 12/115:30 a.m.
PDX
-
YYZ
1 stop7h 38m
United Airlines
Thu 19/115:55 p.m.
YYZ
-
PDX
1 stop8h 17m
United Airlines
Deal found 8/7C$ 435
Thu 12/1110:00 a.m.
PDX
-
YYZ
1 stop6h 57m
Air Canada
Tue 17/118:00 a.m.
YYZ
-
PDX
2 stops9h 41m
Air Canada
Deal found 9/7C$ 436
Sun 13/92:27 p.m.
PDX
-
YYZ
1 stop16h 27m
Multiple Airlines
Wed 16/97:45 a.m.
YYZ
-
PDX
2 stops10h 01m
Multiple Airlines
Deal found 8/7C$ 442
Tue 10/1110:00 a.m.
PDX
-
YYZ
2 stops10h 40m
Air Canada
Fri 13/118:00 a.m.
YYZ
-
PDX
2 stops9h 41m
Air Canada
Deal found 8/7C$ 443
Fri 28/87:45 p.m.
PDX
-
YTZ
2 stops9h 00m
Air Canada
Fri 4/96:50 a.m.
YTZ
-
PDX
2 stops12h 06m
Air Canada
Deal found 8/7C$ 459
Sat 5/93:30 p.m.
PDX
-
YUL
2 stops12h 40m
Air Canada
Sat 12/98:10 a.m.
YUL
-
PDX
2 stops14h 01m
Air Canada
Deal found 11/7C$ 466
Sat 19/97:45 p.m.
PDX
-
YTZ
2 stops12h 10m
Air Canada
Tue 22/96:55 p.m.
YTZ
-
PDX
2 stops22h 51m
Air Canada
Deal found 11/7C$ 502

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 12 July 2026.

Round-trip from

C$ 399

One-way from

C$ 159

Popular in

December

Cheapest in

August

Average price

C$ 563
Air Canada
  • Air Canada
  • 28/8-4/9
  • 4 total stops
  • 22h 36m total
  • Portland to Ontario
Search Deals
Air Canada
  • Air Canada
  • 11/10
  • 1 total stop
  • 7h 05m total
  • Portland to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 629,999 searches. Data last updated 12 July 2026.
Use the filters below to find and compare flights from Portland to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Mon 19/10

2:27 p.m.-11:59 p.m.

1 stop6h 32m

Toronto Pearson Intl

Thu 29/10

5:55 p.m.-11:12 p.m.

1 stop8h 17m

C$ 435

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Mon 9/11

10:00 a.m.-9:24 p.m.

1 stop8h 24m

Toronto Pearson Intl

Mon 16/11

5:55 p.m.-11:12 p.m.

1 stop8h 17m

C$ 435

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Wed 14/10

8:25 a.m.-7:02 p.m.

1 stop7h 37m

Toronto Pearson Intl

Wed 21/10

7:55 a.m.-2:51 p.m.

2 stops9h 56m

C$ 442

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Fri 11/9

11:02 p.m.-9:54 a.m.

1 stop7h 52m

Toronto Pearson Intl

Wed 16/9

2:30 p.m.-8:10 p.m.

1 stop8h 40m

C$ 449

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Tue 22/9

7:02 a.m.-8:44 p.m.

1 stop10h 42m

Toronto Pearson Intl

Thu 24/9

3:53 p.m.-10:21 p.m.

1 stop9h 28m

C$ 449

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Wed 9/9

8:40 a.m.-9:32 p.m.

1 stop9h 52m

Toronto Pearson Intl

Mon 14/9

3:53 p.m.-11:15 p.m.

1 stop10h 22m

C$ 449
Quickest round-trip

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Wed 16/9

5:00 a.m.-3:14 p.m.

1 stop7h 14m

Toronto Pearson Intl

Sun 20/9

7:00 a.m.-11:28 a.m.

1 stop7h 28m

C$ 449

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Fri 18/9

8:25 a.m.-7:02 p.m.

1 stop7h 37m

Toronto Pearson Intl

Thu 24/9

10:45 a.m.-3:05 p.m.

1 stop7h 20m

C$ 449

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sat 10/10

5:00 a.m.-3:14 p.m.

1 stop7h 14m

Toronto Pearson Intl

Sat 17/10

4:18 p.m.-9:10 p.m.

1 stop7h 52m

C$ 449

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Mon 17/8

7:16 a.m.-5:56 p.m.

1 stop7h 40m

Toronto Pearson Intl

Sat 22/8

8:00 p.m.-9:50 a.m.

1 stop16h 50m

C$ 464

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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, October is the cheapest month in which you can book a flight from Portland to Region of Ontario (average of C$ 146). Flying from Portland to Region of Ontario in May is currently the most expensive (average of C$ 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.

How much does it cost to fly round-trip from Portland to Region of Ontario?

How far ahead should I book a flight from Portland to Region of Ontario?

The price you pay for your flight from Portland to Region of Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 87 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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?

    Most people fly from Portland (PDX) if they book a flight from Portland to Ontario. Portland is conveniently located just 9.7 km from Portland’s city centre.

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

    United Airlines, Air Canada, and Delta can get you from Portland to Region of Ontario in just under 6h 32m. Your travel time can differ by up to 5h 38m. Portland and Region of Ontario are separated by a distance of 3364 km. Both multi-stop and direct flights can be found to your destination and back.

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

    The cheapest airlines for a one-way flight from Portland to Region of Ontario are WestJet (C$ 138), United Airlines (C$ 192), and Air Canada (C$ 201).

  • 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, October is the cheapest month in which you can book a flight from Portland to Region of Ontario (average of C$ 146). Flying from Portland to Region of Ontario in May is currently the most expensive (average of C$ 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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Why should you use Cheapflights to find cheap flight tickets from Portland to Ontario?

Cheapflights helps you find that perfect flight to Ontario from Portland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Portland to Ontario with no change fees?

Certainly. Search results for flights to Ontario from Portland shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Portland to Ontario become cheaper?

Not ready to book yet? You can track prices for flights from Portland to Ontario on Cheapflights with our Price Alert feature and get notified when better prices are available.

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