HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$130+ 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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — YYZ
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 April 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$249
(Justfly.com)

One-way from

$130
(oojo)

Popular in

March

Cheapest in

August

Average price

$531
Provider with most accurate pricing for Portland-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Toronto (YTO) flights.
Search Deals
From Portland to Ontario
Search Deals
One-way flight from Portland to Ontario
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($99 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 April 30, 2025.

This Justfly.com deal was found by Cheapflights users on 4/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/171:45 pmPDX - YYZ
1 stop7h 39mWestJet
Mon 7/218:00 amYYZ - PDX
1 stop7h 52mWestJet
Deal found 4/28$249
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/311:19 pmPDX - YYZ
2 stops13h 53mMultiple Airlines
Mon 8/46:30 amYYZ - PDX
1 stop9h 22mMultiple Airlines
Deal found 4/28$270
This Justfly.com deal was found by Cheapflights users on 4/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/241:45 pmPDX - YUL
1 stop7h 58mWestJet
Tue 7/297:00 amYUL - PDX
1 stop8h 52mWestJet
Deal found 4/28$285
This Air Canada deal was found by Cheapflights users on 4/28. 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 5/317:00 amPDX - YYZ
1 stop6h 42mAir Canada
Mon 6/26:15 amYYZ - PDX
2 stops11h 30mAir Canada
Deal found 4/28$307
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Sat 5/318:30 amPDX - YYZ
1 stop12h 28mUnited Airlines
Mon 6/26:30 amYYZ - PDX
1 stop17h 17mUnited Airlines
Deal found 4/28$317
This Gotogate deal was found by Cheapflights users on 4/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/293:25 pmPDX - YUL
2 stops12h 45mAir Canada
Fri 6/68:10 amYUL - PDX
1 stop19h 20mAir Canada
Deal found 4/29$317
This Justfly.com deal was found by Cheapflights users on 4/29. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/21:45 pmPDX - YOW
2 stops12h 40mWestJet
Sat 8/166:10 amYOW - PDX
2 stops9h 42mWestJet
Deal found 4/29$323
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/241:19 pmPDX - YUL
2 stops32h 18mMultiple Airlines
Tue 7/297:00 amYUL - PDX
1 stop8h 52mMultiple Airlines
Deal found 4/29$335
This Delta deal was found by Cheapflights users on 4/28. 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.
Thu 6/199:30 pmPDX - YYZ
1 stop11h 43mDelta
Wed 7/23:31 pmYYZ - PDX
1 stop9h 31mDelta
Deal found 4/28$341
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Mon 5/125:00 amPDX - YUL
1 stop15h 26mUnited Airlines
Thu 5/154:05 pmYUL - PDX
1 stop9h 48mUnited Airlines
Deal found 4/28$341
This American Airlines deal was found by Cheapflights users on 4/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/19:38 pmPDX - YUL
1 stop13h 06mAmerican Airlines
Tue 7/15:29 pmYUL - PDX
1 stop19h 10mAmerican Airlines
Deal found 4/28$353
This American Airlines deal was found by Cheapflights users on 4/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1511:49 pmPDX - YYZ
1 stop11h 41mAmerican Airlines
Sat 5/176:20 pmYYZ - PDX
1 stop19h 04mAmerican Airlines
Deal found 4/28$366

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 April 30, 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

Thu 7/17

1:45 pm-12:24 am

1 stop7h 39m

Toronto Pearson Intl

Mon 7/21

8:00 am-12:52 pm

1 stop7h 52m

$249

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Thu 7/24

1:45 pm-12:43 am

1 stop7h 58m

Montreal Pierre Elliott Trudeau Intl

Tue 7/29

7:00 am-12:52 pm

1 stop8h 52m

$285

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sat 5/31

7:00 am-4:42 pm

1 stop6h 42m

Toronto Pearson Intl

Mon 6/2

6:15 am-2:45 pm

2 stops11h 30m

$307

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sat 5/31

8:30 am-11:58 pm

1 stop12h 28m

Toronto Pearson Intl

Mon 6/2

6:30 am-8:47 pm

1 stop17h 17m

$317

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Thu 5/29

3:25 pm-7:10 am

2 stops12h 45m

Montreal Pierre Elliott Trudeau Intl

Fri 6/6

8:10 am-12:30 am

1 stop19h 20m

$317

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Mon 6/2

5:40 pm-5:51 am

3 stops33h 11m

Toronto Pearson Intl

Thu 6/5

8:00 am-12:52 pm

1 stop7h 52m

$323

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Sat 8/2

1:45 pm-5:25 am

2 stops12h 40m

Ottawa

Sat 8/16

6:10 am-12:52 pm

2 stops9h 42m

$323

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Thu 7/24

1:19 pm-12:37 am

2 stops32h 18m

Montreal Pierre Elliott Trudeau Intl

Tue 7/29

7:00 am-12:52 pm

1 stop8h 52m

$335

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 6/19

9:30 pm-12:13 pm

1 stop11h 43m

Toronto Pearson Intl

Thu 7/3

3:31 pm-10:02 pm

1 stop9h 31m

$341

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Mon 5/12

5:00 am-11:26 pm

1 stop15h 26m

Montreal Pierre Elliott Trudeau Intl

Thu 5/15

4:05 pm-10:53 pm

1 stop9h 48m

$341

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 37 results
1
2
3
4

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 July is currently the most expensive (average of $359). 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 April 30, 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

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 April 30, 2025.
See what other customers who have flown with Alaska Airlines, Delta and United Airlines from Portland to Ontario have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,929 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
WestJet
7.2
Good
2,823 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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?

    $130 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on American Airlines and Alaska Airlines, with prices starting from $131 and $136, 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 July is currently the most expensive (average of $359). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Boise to Vancouver Intl flights
Portland to Pierre Elliott Trudeau Intl flights
Portland to Victoria flights
Medford to Vancouver Intl flights
Boise to Calgary flights
Eugene to Vancouver Intl flights
Boise to Pearson Intl flights
Portland to Edmonton flights
Portland to Toronto Island flights
Portland to Québec City flights
Portland to Halifax flights
Redmond to Vancouver Intl flights
Boise to Pierre Elliott Trudeau Intl flights
Portland to Kelowna flights
Portland to Saskatoon flights
Portland to Ottawa flights
Yakima to Vancouver Intl flights
Medford to Pearson Intl flights
Redmond to Halifax flights
Portland to Winnipeg flights
Eugene to Pearson Intl flights
Portland to Yellowknife flights
Boise to Halifax flights
Boise to Victoria flights
Redmond to Calgary flights
Portland to Whitehorse flights
Portland to Kamloops flights
Eugene to Pierre Elliott Trudeau Intl flights
Medford to Hamilton flights
Portland to Comox flights
Portland to St. John's flights
Medford to Pierre Elliott Trudeau Intl flights
Boise to Hamilton flights
Portland to Regina flights
Boise to Québec City flights
Portland to Fredericton flights
Yakima to Edmonton flights
Eugene to Edmonton flights
Eugene to Ottawa flights
Portland to Williams Lake flights
Medford to Ottawa flights
Redmond to Pearson 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$138Average$553FlexibilityNo cancel feeOn-time67%
WestJetCheapest$211Average$357FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$296Average$627FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$317Average$461FlexibilityNo cancel feeOn-time75%
DeltaCheapest$340Average$471FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$348Average$598FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.