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Cheap flights from Portland to Porto from $364

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 Porto departing on 9/30. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
KLM Logo
1:20 pm - 10:30 amPDX  Portland-OPO Porto
13h 10m1 stop Amsterdam Schiphol
KLM Logo
5:00 am - 11:20 amOPO  Porto-PDX Portland
14h 20m1 stop Amsterdam Schiphol
$737KLM
Mon, Feb 1 - Wed, Feb 24
Delta Logo
6:04 am - 10:35 amPDX  Portland-OPO Porto
20h 31m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle
Delta Logo
5:00 am - 11:20 amOPO  Porto-PDX Portland
14h 20m1 stop Amsterdam Schiphol
$737Delta
Mon, Feb 1 - Wed, Feb 24
Delta Logo
6:04 am - 10:35 amPDX  Portland-OPO Porto
20h 31m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle
Delta Logo
5:00 am - 6:43 pmOPO  Porto-PDX Portland
21h 43m2 stops Amsterdam Schiphol Seattle/Tacoma Intl
$747Delta
Mon, Feb 1 - Wed, Feb 24
American Airlines Logo
5:00 am - 7:40 amPDX  Portland-OPO Porto
18h 40m2 stops Dallas/Fort Worth Madrid Barajas
American Airlines Logo
8:40 pm - 11:05 amOPO  Porto-PDX Portland
22h 25m2 stops Madrid Barajas Dallas/Fort Worth
$754American Airlines
Tue, Nov 24 - Wed, Dec 2
American Airlines Logo
7:00 am - 7:40 amPDX  Portland-OPO Porto
16h 40m2 stops Dallas/Fort Worth Madrid Barajas
American Airlines Logo
8:40 pm - 11:05 amOPO  Porto-PDX Portland
22h 25m2 stops Madrid Barajas Dallas/Fort Worth
$754American Airlines
Tue, Nov 24 - Wed, Dec 2
United Airlines Logo
10:45 am - 9:30 amPDX  Portland-OPO Porto
14h 45m2 stops Chicago O'Hare Intl Newark
United Airlines Logo
12:35 pm - 10:17 amOPO  Porto-PDX Portland
29h 42m2 stops Newark Chicago O'Hare Intl
$755United Airlines
Mon, Dec 7 - Fri, Dec 11
United Airlines Logo
7:00 am - 9:30 amPDX  Portland-OPO Porto
18h 30m2 stops Chicago O'Hare Intl Newark
United Airlines Logo
12:35 pm - 9:40 amOPO  Porto-PDX Portland
29h 05m2 stops Newark Denver Intl
$755United Airlines
Mon, Dec 7 - Fri, Dec 11
Delta Logo
11:31 am - 10:00 pmPDX  Portland-OPO Porto
26h 29m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle
Delta Logo
5:00 am - 11:20 amOPO  Porto-PDX Portland
14h 20m1 stop Amsterdam Schiphol
$767Delta
Tue, Nov 24 - Wed, Dec 2
KLM Logo
7:05 am - 9:05 amPDX  Portland-OPO Porto
18h 00m1 stop New York John F Kennedy Intl
KLM Logo
5:00 am - 11:20 amOPO  Porto-PDX Portland
14h 20m1 stop Amsterdam Schiphol
$823KLM
Wed, Nov 25 - Mon, Nov 30
KLM Logo
1:05 pm - 7:10 pmPDX  Portland-OPO Porto
22h 05m1 stop Amsterdam Schiphol
KLM Logo
5:00 am - 12:20 pmOPO  Porto-PDX Portland
14h 20m1 stop Amsterdam Schiphol
$877KLM
Thu, Oct 15 - Fri, Oct 30

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United Airlines flights from Portland to Porto

Our best United Airlines deals on Portland to Porto flight tickets
United Airlines
Dec 7
PDX10:45 amPortland
14h 45m
2 stops
OPO9:30 amPorto
Dec 11
OPO12:35 pmPorto
16h 46m
1 stop
PDX9:21 pmPortland
$755
United Airlines
Oct 24
PDX11:30 pmPortland
27h 00m
2 stops
OPO9:30 amPorto
Nov 4
OPO12:35 pmPorto
18h 34m
2 stops
PDX11:09 pmPortland
$815
United Airlines
Sep 21
PDX11:09 pmPortland
23h 06m
1 stop
OPO6:15 amPorto
Oct 13
OPO12:15 pmPorto
37h 31m
2 stops
PDX5:46 pmPortland
$850

British Airways flights from Portland to Porto

Our best British Airways deals on Portland to Porto flight tickets
British Airways
Oct 25
PDX11:58 amPortland
21h 47m
2 stops
OPO4:45 pmPorto
Nov 3
OPO8:20 amPorto
19h 27m
2 stops
PDX7:47 pmPortland
$790
British Airways
Oct 25
PDX1:12 pmPortland
20h 33m
2 stops
OPO4:45 pmPorto
Nov 2
OPO12:25 pmPorto
37h 23m
2 stops
PDX5:48 pmPortland
$842

momondo Fare Finder

 
Customize your flight search to find flights from Portland to Porto 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 August 9, 2026.
Use the filters below to find and compare flights from Portland to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 2/1

1:20 pm-10:30 am

1 stop13h 10m

Porto

Wed 2/24

5:00 am-11:20 am

1 stop14h 20m

$737

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 2/1

6:04 am-10:35 am

2 stops20h 31m

Porto

Wed 2/24

5:00 am-11:20 am

1 stop14h 20m

$737

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 2/1

6:04 am-10:35 am

2 stops20h 31m

Porto

Wed 2/24

5:00 am-6:43 pm

2 stops21h 43m

$747

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Tue 11/24

5:00 am-7:40 am

2 stops18h 40m

Porto

Wed 12/2

8:40 pm-11:05 am

2 stops22h 25m

$754

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Tue 11/24

7:00 am-7:40 am

2 stops16h 40m

Porto

Wed 12/2

8:40 pm-11:05 am

2 stops22h 25m

$754

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 12/7

10:45 am-9:30 am

2 stops14h 45m

Porto

Fri 12/11

12:35 pm-10:17 am

2 stops29h 42m

$755

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 12/7

7:00 am-9:30 am

2 stops18h 30m

Porto

Fri 12/11

12:35 pm-9:40 am

2 stops29h 05m

$755

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Tue 11/24

11:31 am-10:00 pm

2 stops26h 29m

Porto

Wed 12/2

5:00 am-11:20 am

1 stop14h 20m

$767

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Wed 11/25

7:05 am-9:05 am

1 stop18h 00m

Porto

Mon 11/30

5:00 am-11:20 am

1 stop14h 20m

$823

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Thu 10/15

1:05 pm-7:10 pm

1 stop22h 05m

Porto

Fri 10/30

5:00 am-12:20 pm

1 stop14h 20m

$877

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Portland to Porto

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 typical price of a round-trip flight between Portland and Porto?

Prices are currently low for flights on this route.

Typical prices usually range from $874 to $1,099.
The lowest price recently found on this route was $726.

What is the cheapest month to fly to Porto?

The month of January is, on average, the cheapest month to fly to Porto from Portland, with most prices found around $484. If you aren’t able to travel during the month of January, then book flights to Porto from Portland during December instead. Flights to Porto in December, while not as cheap as those in January, still average around $589.

Can stopping save me money on Portland to Porto flights?

You could potentially save up to 13% on your flight if you consider stops on a Portland to Porto flight.

When to book flights from Portland to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland to Porto (PDX to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Porto

Fastest flight time

14h 45m

Direct flights

None
The fastest flight from Portland to Porto takes 14h 45m
There are no direct flights from Portland to Porto. There are no popular flight routes from Portland to Porto.
Search flight deals

Frequently asked questions about flying from Portland to Porto

  • How far is Portland to Porto by plane?

    A flight from Portland to Porto will travel around 5195.4 mi. Flights usually cover this in 14h 45m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Portland Airport to Porto Airport?

    Prices for flights from Portland Airport to Porto Airport are refreshed on a daily basis.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Portland to Porto?

Best airlines flying from Portland to Porto

Compare and see reviews for airlines that fly from Portland to Porto with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $494Free CancellationRating
7.8
8,497 reviews
Search Delta flights
KLMPriceFrom $498Free CancellationRating
7.8
1,555 reviews
Search KLM flights
United AirlinesPriceFrom $502Free CancellationRating
7.4
10,097 reviews
Search United Airlines flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Braga
Aveiro
Matosinhos
Pinhao
Esposende
Lamego
Chaves
Arcos de Valdevez
Guimarães
Viseu
Espinho
Ponte de Lima
Mesao Frio
Penafiel
Baiao

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Portland to Porto. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to Porto from Portland which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Portland to Porto.

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

Yes momondo offers price alerts on flights to Porto 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.

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