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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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — YYZ
3 Aug — 10 Aug1
Round-trip
1 adult
Economy
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 29 July 2025.
Find flight deals from Portland to Ontario
Cheapest flights from Portland to OntarioExplore 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 29 July 2025.
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 29 July 2025.
Tue 26/81:45 p.m.PDX - YYZ
2 stops13h 06mWestJet
Tue 2/98:00 a.m.YYZ - PDX
1 stop7h 48mWestJet
Deal found 27/7C$ 380
Thu 25/97:22 p.m.PDX - YYZ
2 stops22h 30mMultiple Airlines
Mon 29/99:45 a.m.YYZ - PDX
1 stop11h 42mMultiple Airlines
Deal found 26/7C$ 391
Wed 3/93:25 p.m.PDX - YYZ
2 stops11h 20mAir Canada
Thu 4/98:00 a.m.YYZ - PDX
1 stop9h 46mAir Canada
Deal found 26/7C$ 405
Thu 28/810:05 a.m.PDX - YUL
1 stop7h 45mAir Canada
Sat 6/96:00 p.m.YUL - PDX
1 stop8h 01mAir Canada
Deal found 27/7C$ 413
Wed 3/96:15 a.m.PDX - YTZ
2 stops11h 26mAir Canada
Mon 8/94:10 p.m.YTZ - PDX
2 stops9h 51mAir Canada
Deal found 26/7C$ 436
Tue 2/91:45 p.m.PDX - YOW
1 stop14h 00mWestJet
Sat 20/96:00 a.m.YOW - PDX
1 stop10h 05mWestJet
Deal found 28/7C$ 438
Sat 16/810:55 p.m.PDX - YYZ
1 stop8h 03mUnited Airlines
Sat 23/87:00 p.m.YYZ - PDX
1 stop16h 51mUnited Airlines
Deal found 27/7C$ 450
Sat 30/810:05 p.m.PDX - YYZ
1 stop11h 05mDelta
Thu 4/96:04 a.m.YYZ - PDX
1 stop8h 56mDelta
Deal found 26/7C$ 468
Sat 6/97:40 p.m.PDX - YOW
1 stop9h 43mAir Canada
Sat 20/96:00 p.m.YOW - PDX
1 stop8h 01mAir Canada
Deal found 28/7C$ 468
Fri 7/118:20 a.m.PDX - YOW
1 stop12h 34mUnited Airlines
Tue 11/1111:10 a.m.YOW - PDX
1 stop14h 23mUnited Airlines
Deal found 27/7C$ 480
Wed 3/97:52 p.m.PDX - YTZ
2 stops13h 25mMultiple Airlines
Fri 5/92:45 p.m.YTZ - PDX
3 stops25h 20mMultiple Airlines
Deal found 27/7C$ 486
Tue 19/811:59 p.m.PDX - YUL
1 stop11h 55mAmerican Airlines
Tue 26/85:29 p.m.YUL - PDX
1 stop8h 51mAmerican Airlines
Deal found 29/7C$ 498
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 29 July 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 26/9
7:40 p.m.-7:59 a.m.
1 stop9h 19m
Toronto Pearson Intl
Mon 29/9
8:30 a.m.-2:46 p.m.
1 stop9h 16m
C$ 380
PortlandToronto
PDX - YYZ
PDXYYZ
Portland
Thu 25/9
7:22 p.m.-8:52 p.m.
2 stops22h 30m
Toronto Pearson Intl
Mon 29/9
9:45 a.m.-6:27 p.m.
1 stop11h 42m
C$ 391
PortlandToronto
PDX - YYZ
PDXYYZ
Portland
Tue 26/8
1:45 p.m.-12:24 a.m.
1 stop7h 39m
Toronto Pearson Intl
Tue 2/9
8:00 a.m.-12:48 p.m.
1 stop7h 48m
C$ 396
PortlandMontreal
PDX - YUL
PDXYUL
Portland
Thu 28/8
10:05 a.m.-8:50 p.m.
1 stop7h 45m
Montreal Pierre Elliott Trudeau Intl
Sat 6/9
6:00 p.m.-11:01 p.m.
1 stop8h 01m
C$ 413
PortlandToronto
PDX - YTZ
PDXYTZ
Portland
Wed 3/9
6:15 a.m.-8:41 p.m.
2 stops11h 26m
Toronto Island
Mon 8/9
4:10 p.m.-11:01 p.m.
2 stops9h 51m
C$ 436
PortlandOttawa
PDX - YOW
PDXYOW
Portland
Tue 2/9
1:45 p.m.-6:45 a.m.
1 stop14h 00m
Ottawa
Sat 20/9
6:00 a.m.-1:05 p.m.
1 stop10h 05m
C$ 438
PortlandToronto
PDX - YYZ
PDXYYZ
Portland
Sat 16/8
10:55 p.m.-9:58 a.m.
1 stop8h 03m
Toronto Pearson Intl
Sat 23/8
7:00 p.m.-8:51 a.m.
1 stop16h 51m
C$ 450
PortlandToronto
PDX - YYZ
PDXYYZ
Portland
Wed 10/9
2:05 p.m.-12:30 p.m.
1 stop19h 25m
Toronto Pearson Intl
Tue 16/9
11:00 a.m.-6:54 p.m.
2 stops10h 54m
C$ 454
PortlandToronto
PDX - YYZ
PDXYYZ
Portland
Sat 30/8
10:05 p.m.-12:10 p.m.
1 stop11h 05m
Toronto Pearson Intl
Thu 4/9
6:04 a.m.-12:00 p.m.
1 stop8h 56m
C$ 468
PortlandOttawa
PDX - YOW
PDXYOW
Portland
Sat 6/9
7:40 p.m.-8:23 a.m.
1 stop9h 43m
Ottawa
Sat 20/9
6:00 p.m.-11:01 p.m.
1 stop8h 01m
C$ 468
Showing 1-10 of 34 results
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 C$ 167). Flying from Portland to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 29 July 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland to Region of Ontario as you normally would.
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 29 July 2025.
Read reviews from past customers who have flown Alaska Airlines,Delta, andUnited Airlines from Portland to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.1
Comfort
7.8
Overall
8.0
Crew
8.5
Boarding
8.1
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Food
7.1
Comfort
7.8
Overall
8.0
Crew
8.5
Boarding
8.1
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Food
7.1
Comfort
7.8
Overall
8.0
Crew
8.5
Boarding
8.1
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Food
7.1
Comfort
7.8
Overall
8.0
Crew
8.5
Boarding
8.1
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Food
7.1
Comfort
7.8
Overall
8.0
Crew
8.5
Boarding
8.1
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Food
7.1
Comfort
7.8
Overall
8.0
Crew
8.5
Boarding
8.1
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
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.
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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.
Top 2 airlines flying from Portland to Ontario
Discover the top 2 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 629,999 searches. Data last updated 29 July 2025.
Fly with Cheapflights
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How does Cheapflights help users find flights from Portland to Ontario?
Cheapflights makes it easy to find Portland to Ontario flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
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.