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Cheap flights from Portland to Ontario from C$ 142

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 29/7. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — YYZ
19 Jun — 26 Jun1
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 20 May 2026.

Wed 29/72:30 p.m.
PDX
-
YYZ
2 stops11h 40m
WestJet
Wed 5/88:00 a.m.
YYZ
-
PDX
1 stop8h 50m
WestJet
Deal found 16/5C$ 362
Fri 3/72:30 p.m.
PDX
-
YYZ
1 stop7h 35m
WestJet
Thu 9/76:10 a.m.
YYZ
-
PDX
2 stops10h 40m
WestJet
Deal found 17/5C$ 366
Wed 19/82:30 p.m.
PDX
-
YYZ
2 stops11h 40m
WestJet
Fri 21/86:10 a.m.
YYZ
-
PDX
2 stops10h 40m
WestJet
Deal found 19/5C$ 367
Sun 5/72:30 p.m.
PDX
-
YYZ
2 stops19h 15m
WestJet
Thu 9/79:00 a.m.
YYZ
-
PDX
1 stop7h 50m
WestJet
Deal found 18/5C$ 374
Thu 2/72:30 p.m.
PDX
-
YYZ
1 stop12h 15m
WestJet
Wed 8/78:00 a.m.
YYZ
-
PDX
1 stop8h 50m
WestJet
Deal found 18/5C$ 388
Thu 25/62:30 p.m.
PDX
-
YYZ
2 stops11h 40m
WestJet
Thu 16/77:00 a.m.
YYZ
-
PDX
1 stop9h 50m
WestJet
Deal found 18/5C$ 393
Wed 15/72:30 p.m.
PDX
-
YYZ
2 stops11h 40m
WestJet
Sat 25/710:25 p.m.
YYZ
-
PDX
1 stop18h 25m
WestJet
Deal found 17/5C$ 399
Thu 2/72:30 p.m.
PDX
-
YYZ
1 stop7h 35m
WestJet
Mon 6/72:25 p.m.
YYZ
-
PDX
2 stops26h 25m
WestJet
Deal found 16/5C$ 404
Tue 18/82:30 p.m.
PDX
-
YUL
1 stop13h 35m
WestJet
Sat 29/87:15 a.m.
YUL
-
PDX
1 stop9h 35m
WestJet
Deal found 16/5C$ 425
Sun 12/72:30 p.m.
PDX
-
YUL
1 stop13h 35m
WestJet
Fri 17/77:15 a.m.
YUL
-
PDX
1 stop9h 35m
WestJet
Deal found 19/5C$ 428
Sun 19/72:30 p.m.
PDX
-
YUL
1 stop30h 15m
WestJet
Tue 28/77:15 a.m.
YUL
-
PDX
1 stop9h 35m
WestJet
Deal found 17/5C$ 461
Fri 3/72:30 p.m.
PDX
-
YOW
1 stop7h 10m
WestJet
Thu 9/77:20 a.m.
YOW
-
PDX
1 stop9h 30m
WestJet
Deal found 17/5C$ 463

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 20 May 2026.

Round-trip from

C$ 362

One-way from

C$ 142

Popular in

December

Cheapest in

January

Average price

C$ 637
WestJet
  • WestJet
  • 29/7-5/8
  • 3 total stops
  • 20h 30m total
  • Portland to Ontario
Search Deals
WestJet
  • WestJet
  • 29/7
  • 1 total stop
  • 7h 35m total
  • Portland to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 20 May 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
Quickest round-trip

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Fri 3/7

2:30 p.m.-12:40 a.m.

1 stop7h 10m

Ottawa

Thu 9/7

7:20 a.m.-1:50 p.m.

1 stop9h 30m

C$ 463

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Thu 3/9

2:30 p.m.-4:30 p.m.

1 stop23h 00m

Montreal Pierre Elliott Trudeau Intl

Wed 9/9

7:15 a.m.-1:50 p.m.

1 stop9h 35m

C$ 468

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 17/9

10:55 p.m.-1:25 p.m.

1 stop11h 30m

Toronto Pearson Intl

Sun 20/9

12:30 p.m.-8:15 p.m.

1 stop10h 45m

C$ 503

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Wed 17/6

6:35 a.m.-9:59 p.m.

1 stop12h 24m

Toronto Pearson Intl

Sat 20/6

11:38 a.m.-9:52 p.m.

1 stop13h 14m

C$ 503

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 25/6

7:01 a.m.-11:15 p.m.

1 stop13h 14m

Toronto Pearson Intl

Thu 16/7

2:24 p.m.-9:48 p.m.

1 stop10h 24m

C$ 503

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Tue 16/6

6:35 a.m.-9:59 p.m.

1 stop12h 24m

Toronto Pearson Intl

Sat 20/6

12:25 p.m.-8:17 p.m.

1 stop10h 52m

C$ 503

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Mon 6/7

11:15 p.m.-1:34 p.m.

1 stop11h 19m

Toronto Pearson Intl

Thu 9/7

12:25 p.m.-8:15 p.m.

1 stop10h 50m

C$ 503

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 22/10

10:35 p.m.-7:00 p.m.

1 stop17h 25m

Toronto Pearson Intl

Mon 26/10

6:40 p.m.-9:21 a.m.

1 stop17h 41m

C$ 535

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Wed 9/9

2:30 p.m.-1:05 a.m.

1 stop7h 35m

Toronto Pearson Intl

Mon 14/9

7:00 a.m.-8:39 p.m.

2 stops16h 39m

C$ 543

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 9/7

10:40 p.m.-9:54 a.m.

1 stop8h 14m

Toronto Pearson Intl

Tue 14/7

9:00 p.m.-9:34 a.m.

1 stop15h 34m

C$ 556

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/5

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$ 142). Flying from Portland to Region of Ontario in May is currently the most expensive (average of C$ 296). 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 89 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?

    WestJet, Delta, and United Airlines can get you from Portland to Region of Ontario in just under 7h 10m. Your travel time can differ by up to 6h 43m. Portland and Region of Ontario are separated by a distance of 3605 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 Air Canada (C$ 104), WestJet (C$ 134), and United Airlines (C$ 183).

  • 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$ 142). Flying from Portland to Region of Ontario in May is currently the most expensive (average of C$ 296). 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.

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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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