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Cheap flights from Portland to Ontario from $110

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Ontario departing on 10/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Portland to Ontario

Cheap round-trip flights

Air Canada Logo
6:15 am - 11:19 pmPDX-YUL
14h 04m2 stops
Air Canada Logo
7:30 am - 2:46 pmYUL-PDX
10h 16m1 stop
$266Air Canada
Find Deal
Thu, Oct 16 - Wed, Oct 22
Air Canada Logo
3:25 pm - 7:10 amPDX-YUL
12h 45m2 stops
Air Canada Logo
8:00 am - 6:46 pmYUL-PDX
13h 46m2 stops
$280Air Canada
Find Deal
Thu, Oct 16 - Wed, Oct 22
United Airlines Logo
11:59 pm - 9:58 amPDX-YYZ
6h 59m1 stop
United Airlines Logo
11:00 am - 12:28 amYYZ-PDX
16h 28m2 stops
$300United Airlines
Find Deal
Sat, Oct 18 - Fri, Oct 24
United Airlines Logo
5:00 am - 3:11 pmPDX-YYZ
7h 11m1 stop
United Airlines Logo
5:15 pm - 10:30 pmYYZ-PDX
8h 15m1 stop
$308United Airlines
Find Deal
Sat, Oct 25 - Sat, Oct 25
WestJet Logo
1:45 pm - 12:31 amPDX-YYZ
31h 46m2 stops
WestJet Logo
8:00 am - 1:05 pmYYZ-PDX
8h 05m1 stop
$319WestJet
Find Deal
Sat, Sep 27 - Sat, Oct 4
American Airlines Logo
9:56 pm - 1:40 pmPDX-YUL
12h 44m1 stop
American Airlines Logo
5:15 pm - 12:05 amYUL-PDX
9h 50m1 stop
$324American Airlines
Find Deal
Mon, Sep 29 - Wed, Oct 1
American Airlines Logo
5:34 am - 10:45 pmPDX-YYZ
14h 11m1 stop
American Airlines Logo
6:49 am - 7:14 pmYYZ-PDX
15h 25m1 stop
$336American Airlines
Find Deal
Wed, Oct 22 - Mon, Oct 27
Delta Logo
12:45 am - 11:38 amPDX-YYZ
7h 53m1 stop
Delta Logo
6:15 am - 1:00 pmYYZ-PDX
9h 45m1 stop
$341Delta
Find Deal
Fri, Oct 3 - Tue, Oct 7
Delta Logo
12:40 am - 11:47 amPDX-YYZ
8h 07m1 stop
Delta Logo
5:50 pm - 11:43 pmYYZ-PDX
8h 53m1 stop
$346Delta
Find Deal
Tue, Oct 21 - Mon, Oct 27
WestJet Logo
11:08 am - 12:40 amPDX-YOW
10h 32m2 stops
WestJet Logo
6:00 am - 1:05 pmYOW-PDX
10h 05m1 stop
$591WestJet
Find Deal
Wed, Oct 1 - Sat, Oct 4

United Airlines flights from Portland to Region of Ontario

Our best United Airlines deals on Portland to Region of Ontario flight tickets
United Airlines
Oct 18
PDX11:59 pmPortland
6h 59m
1 stop
YYZ9:58 amToronto Pearson Intl
Oct 24
YYZ11:00 amToronto Pearson Intl
16h 28m
2 stops
PDX12:28 amPortland
$300
Find similar
United Airlines
Oct 25
PDX5:00 amPortland
7h 11m
1 stop
YYZ3:11 pmToronto Pearson Intl
Oct 25
YYZ5:15 pmToronto Pearson Intl
8h 15m
1 stop
PDX10:30 pmPortland
$308
Find similar
United Airlines
Oct 18
PDX12:53 pmPortland
6h 55m
1 stop
YYZ10:48 pmToronto Pearson Intl
Oct 24
YYZ7:00 amToronto Pearson Intl
20h 28m
2 stops
PDX12:28 amPortland
$311
Find similar

WestJet flights from Portland to Region of Ontario

Our best WestJet deals on Portland to Region of Ontario flight tickets
WestJet
Sep 27
PDX1:45 pmPortland
31h 46m
2 stops
YYZ12:31 amToronto Pearson Intl
Oct 4
YYZ8:00 amToronto Pearson Intl
8h 05m
1 stop
PDX1:05 pmPortland
$319
Find similar
WestJet
Sep 27
PDX1:45 pmPortland
31h 42m
2 stops
YUL12:27 amMontreal Pierre Elliott Trudeau Intl
Oct 5
YUL6:20 amMontreal Pierre Elliott Trudeau Intl
7h 19m
1 stop
PDX10:39 amPortland
$548
Find similar
WestJet
Oct 1
PDX11:08 amPortland
10h 32m
2 stops
YOW12:40 amOttawa
Oct 4
YOW6:00 amOttawa
10h 05m
1 stop
PDX1:05 pmPortland
$591
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portland to Region of 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, momondo users made 832,500 searches. Data last updated September 17, 2025.
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

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Thu 10/16

6:15 am-11:19 pm

2 stops14h 04m

Montreal Pierre Elliott Trudeau Intl

Wed 10/22

7:30 am-2:46 pm

1 stop10h 16m

$266

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Thu 10/16

3:25 pm-7:10 am

2 stops12h 45m

Montreal Pierre Elliott Trudeau Intl

Wed 10/22

8:00 am-6:46 pm

2 stops13h 46m

$280

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sat 10/18

11:59 pm-9:58 am

1 stop6h 59m

Toronto Pearson Intl

Fri 10/24

11:00 am-12:28 am

2 stops16h 28m

$300

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sat 10/25

5:00 am-3:11 pm

1 stop7h 11m

Toronto Pearson Intl

Sat 10/25

5:15 pm-10:30 pm

1 stop8h 15m

$308

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sat 9/27

1:45 pm-12:31 am

2 stops31h 46m

Toronto Pearson Intl

Sat 10/4

8:00 am-1:05 pm

1 stop8h 05m

$319

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Mon 9/29

9:56 pm-1:40 pm

1 stop12h 44m

Montreal Pierre Elliott Trudeau Intl

Wed 10/1

5:15 pm-12:05 am

1 stop9h 50m

$324

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Wed 10/22

5:34 am-10:45 pm

1 stop14h 11m

Toronto Pearson Intl

Mon 10/27

6:49 am-7:14 pm

1 stop15h 25m

$336

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Fri 10/3

12:45 am-11:38 am

1 stop7h 53m

Toronto Pearson Intl

Tue 10/7

6:15 am-1:00 pm

1 stop9h 45m

$341

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Tue 10/21

12:40 am-11:47 am

1 stop8h 07m

Toronto Pearson Intl

Mon 10/27

5:50 pm-11:43 pm

1 stop8h 53m

$346

PortlandOttawa

PDX - YOW

PDXYOW

Portland

Wed 10/1

11:08 am-12:40 am

2 stops10h 32m

Ottawa

Sat 10/4

6:00 am-1:05 pm

1 stop10h 05m

$591

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ontario from

How to get the cheapest flight ticket from Portland to Region of Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Region of Ontario?

The month of August is, on average, the cheapest month to fly to Region of Ontario from Portland, with most prices found around $358. If you aren’t able to travel during the month of August, then book flights to Region of Ontario from Portland during January instead. Flights to Region of Ontario in January, while not as cheap as those in August, still average around $386.

What is the cheapest day to depart on your flight to Region of Ontario?

According to our data, Thursday is the cheapest day to fly to Region of Ontario from Portland. The lowest ticket price found for a Thursday departure recently was $1,325. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Portland to Region of Ontario on a Wednesday will generally be more expensive and average around $1,671. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Region of Ontario?

According to our data, the cheapest time of day to fly to Region of Ontario is in the afternoon. momondo users have found flights departing from Portland to Region of Ontario in the afternoon for as low as $328. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $1,377.

What is the cheapest Portland to Ontario flight route?

Fly from Portland to Toronto Pearson Intl for the best Portland - Ontario flight prices

How far in advance should I book a flight to Region of Ontario?

You are more likely to see cheaper flights to Region of Ontario from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around $461 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from Portland for as low as $287 on momondo.

What cabin class options are available on Portland to Ontario flights?

There are 2 cabin classes available to choose from on Portland to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Portland to Region of Ontario flights?

You could potentially save up to 18% on your flight if you consider stops on a Portland to Region of Ontario flight.

Cheap Portland to Region of Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Region of Ontario

Direct flights

None
There are no direct flights from Portland to Region of Ontario. There are no popular flight routes from Portland to Region of Ontario.
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  • When did momondo last update prices for flights from Portland Airport to Ontario?

    Prices for flights from Portland Airport to Ontario were last updated today.

  • How many operators does momondo search for flights from Portland Airport to Ontario?

  • How old do you have to be to fly from Portland Airport to Ontario?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portland Airport to Ontario.

  • What documentation or ID do you need to fly to Ontario?

    The travel and health documents you'll need for your trip to Ontario may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Portland to Region of Ontario?

Best airlines flying from Portland to Region of Ontario

Compare and see reviews for airlines that fly from Portland to Region of Ontario with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $209Free CancellationRating
7.9
7,961 reviews
Search Delta flights
WestJetPriceFrom $214Free CancellationRating
7.2
3,095 reviews
Search WestJet flights
Air CanadaPriceFrom $276Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
United AirlinesPriceFrom $321Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $343Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $348Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Ontario?

Finding the right flight to Ontario from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ontario quick and easy, saving you time and money.

Can I find flights from Portland to Ontario with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Portland to Ontario flights to just show those with flexible booking policies.

How can momondo help me find flights from Portland to Ontario?

momondo provides multiple filters to help you find the best flight to Ontario from Portland. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Portland to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario from Portland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Region of Ontario trip

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Find better results for your trip to Ontario

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