What is the cheapest airline that flies from Portland to Porto?

KLM and United Airlines are the most popular carriers operating from Portland to Porto

Which layover airport has the shortest connection time from Portland to Porto?

Amsterdam (AMS) has the shortest average layover time for this route: 1h 35m.

Which airport is the most popular layover for flights between Portland and Porto?

Amsterdam (AMS) was the most common stop: 75% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Porto?

KLM, Delta and United Airlines are the top three most popular airlines that fly to Porto from Portland according to our data. KLM is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 3 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

Which layover airport offers the lowest fares from Portland to Porto?

Flights via New York (JFK) offer the lowest average round-trip price of $1,188.

Which layover airport has the shortest travel time from Portland to Porto?

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 13h 35m.

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?

As of September 2026, there are 3 operators available to choose from 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.

$369 Cheap Flights from Portland to Porto in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland to Porto

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:10 am - 10:25 amPDX Portland-OPO Porto

19h 15m2 stops Seattle/Tacoma Intl New York John F Kennedy Intl

11:15 am - 11:40 amOPO Porto-PDX Portland

32h 25m1 stop Amsterdam Schiphol

$734Delta

Sun, Oct 18 - Tue, Nov 3

7:00 am - 10:25 amPDX Portland-OPO Porto

19h 25m1 stop New York John F Kennedy Intl

11:15 am - 11:40 amOPO Porto-PDX Portland

32h 25m1 stop Amsterdam Schiphol

$734Delta

Sun, Oct 18 - Tue, Nov 3

3:30 pm - 6:50 amPDX Portland-OPO Porto

31h 20m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

12:05 pm - 9:02 pmOPO Porto-PDX Portland

40h 57m2 stops Zurich San Francisco

$734Multiple Airlines

Sun, Oct 18 - Tue, Nov 3

7:10 am - 10:25 amPDX Portland-OPO Porto

19h 15m2 stops Seattle/Tacoma Intl New York John F Kennedy Intl

11:15 am - 11:40 amOPO Porto-PDX Portland

32h 25m1 stop Amsterdam Schiphol

$735Delta

Sun, Oct 18 - Tue, Nov 3

5:45 pm - 8:00 pmPDX Portland-OPO Porto

18h 15m2 stops London Heathrow Madrid Barajas

12:25 pm - 7:42 pmOPO Porto-PDX Portland

39h 17m2 stops Madrid Barajas Dallas/Fort Worth

$754Multiple Airlines

Mon, Feb 8 - Mon, Feb 15

7:00 am - 9:30 amPDX Portland-OPO Porto

18h 30m2 stops Chicago O'Hare Intl Newark

12:35 pm - 10:12 amOPO Porto-PDX Portland

29h 37m2 stops Newark Chicago O'Hare Intl

$760United Airlines

Mon, Mar 1 - Fri, Mar 5

10:59 pm - 9:30 amPDX Portland-OPO Porto

26h 31m2 stops Chicago O'Hare Intl Newark

12:35 pm - 11:53 amOPO Porto-PDX Portland

31h 18m2 stops Newark Chicago O'Hare Intl

$760United Airlines

Mon, Mar 1 - Fri, Mar 5

5:45 pm - 4:50 pmPDX Portland-OPO Porto

15h 05m1 stop London Heathrow

8:20 am - 7:47 pmOPO Porto-PDX Portland

19h 27m2 stops Madrid Barajas Chicago O'Hare Intl

$782British Airways

Wed, Nov 11 - Sun, Nov 15

7:00 am - 10:30 amPDX Portland-OPO Porto

19h 30m1 stop New York John F Kennedy Intl

5:00 am - 11:20 amOPO Porto-PDX Portland

14h 20m1 stop Amsterdam Schiphol

$838KLM

Fri, Oct 23 - Mon, Nov 2

1:05 pm - 3:30 pmPDX Portland-OPO Porto

18h 25m1 stop Amsterdam Schiphol

5:00 am - 11:10 amOPO Porto-PDX Portland

14h 10m1 stop Amsterdam Schiphol

$977KLM

Sat, Oct 10 - Sat, Oct 17

Cheap last minute flights

Enter your travel dates to find the best prices.

10:56 am - 9:45 amPDX Portland-OPO Porto

14h 49m1 stop Newark

12:15 pm - 10:53 pmOPO Porto-PDX Portland

42h 38m3 stops Montreal Pierre Elliott Trudeau Intl Newark Denver Intl

$1,139United Airlines

Thu, Sep 10 - Tue, Sep 22

11:09 pm - 6:50 amPDX Portland-OPO Porto

23h 41m1 stop Newark

12:15 pm - 10:53 pmOPO Porto-PDX Portland

42h 38m3 stops Montreal Pierre Elliott Trudeau Intl Newark Denver Intl

$1,139United Airlines

Thu, Sep 10 - Tue, Sep 22

10:56 am - 9:45 amPDX Portland-OPO Porto

14h 49m1 stop Newark

12:15 pm - 5:49 pmOPO Porto-PDX Portland

37h 34m2 stops Montreal Pierre Elliott Trudeau Intl Denver Intl

$1,139United Airlines

Thu, Sep 10 - Tue, Sep 22

11:54 am - 3:25 pmPDX Portland-OPO Porto

19h 31m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle

5:00 am - 11:10 amOPO Porto-PDX Portland

14h 10m1 stop Amsterdam Schiphol

$1,146Delta

Thu, Sep 10 - Tue, Sep 22

9:51 am - 3:25 pmPDX Portland-OPO Porto

21h 34m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle

5:00 am - 5:31 pmOPO Porto-PDX Portland

20h 31m2 stops Amsterdam Schiphol Minneapolis St Paul

$1,156Delta

Thu, Sep 10 - Tue, Sep 22

1:42 pm - 3:25 pmPDX Portland-OPO Porto

17h 43m2 stops Minneapolis St Paul Paris Charles de Gaulle

5:00 am - 5:10 pmOPO Porto-PDX Portland

20h 10m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,156Delta

Thu, Sep 10 - Tue, Sep 22

11:09 pm - 6:50 amPDX Portland-OPO Porto

23h 41m1 stop Newark

12:35 pm - 10:03 pmOPO Porto-PDX Portland

17h 28m1 stop Newark

$1,209Lufthansa

Thu, Sep 10 - Tue, Sep 22

2:30 pm - 10:50 pmPDX Portland-OPO Porto

24h 20m2 stops Calgary Paris Charles de Gaulle

10:30 pm - 1:50 pmOPO Porto-PDX Portland

47h 20m3 stops Lisbon Humberto Delgado Montreal Pierre Elliott Trudeau Intl Calgary

$1,283Multiple Airlines

Thu, Sep 10 - Mon, Sep 14

3:30 pm - 11:55 pmPDX Portland-OPO Porto

24h 25m3 stops Vancouver Intl Munich Franz Josef Strauss Madrid Barajas

10:30 pm - 1:50 pmOPO Porto-PDX Portland

47h 20m3 stops Lisbon Humberto Delgado Montreal Pierre Elliott Trudeau Intl Calgary

$1,354Multiple Airlines

Thu, Sep 10 - Mon, Sep 14

1:05 pm - 10:40 amPDX Portland-OPO Porto

13h 35m1 stop Amsterdam Schiphol

5:00 am - 11:10 amOPO Porto-PDX Portland

14h 10m1 stop Amsterdam Schiphol

$1,423KLM

Thu, Sep 10 - Sun, Sep 13

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Delta flights from Portland to Porto

Our best Delta deals on Portland to Porto flight tickets

Delta

Oct 18

PDX7:00 amPortland

19h 25m

1 stop

OPO10:25 amPorto

Nov 3

OPO11:15 amPorto

32h 25m

1 stop

PDX11:40 amPortland

$734

Delta

Oct 18

PDX7:10 amPortland

19h 15m

2 stops

OPO10:25 amPorto

Nov 3

OPO11:15 amPorto

32h 25m

1 stop

PDX11:40 amPortland

$735

Delta

Oct 18

PDX3:22 pmPortland

35h 08m

2 stops

OPO10:30 amPorto

Nov 3

OPO5:55 amPorto

38h 01m

2 stops

PDX11:56 amPortland

$746

United Airlines flights from Portland to Porto

Our best United Airlines deals on Portland to Porto flight tickets

United Airlines

Mar 1

PDX5:15 amPortland

20h 15m

2 stops

OPO9:30 amPorto

Mar 5

OPO12:35 pmPorto

16h 46m

1 stop

PDX9:21 pmPortland

$760

United Airlines

Feb 8

PDX4:05 pmPortland

35h 40m

3 stops

OPO11:45 amPorto

Feb 15

OPO6:00 amPorto

49h 12m

2 stops

PDX11:12 pmPortland

$798

United Airlines

Oct 21

PDX5:00 amPortland

18h 00m

2 stops

OPO7:00 amPorto

Oct 28

OPO6:00 amPorto

23h 27m

2 stops

PDX10:27 pmPortland

$809

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Sun 10/18

7:10 am-10:25 am

2 stops19h 15m

Porto

Tue 11/3

11:15 am-11:40 am

1 stop32h 25m

$734

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Sun 10/18

7:00 am-10:25 am

1 stop19h 25m

Porto

Tue 11/3

11:15 am-11:40 am

1 stop32h 25m

$734

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Sun 10/18

3:30 pm-6:50 am

2 stops31h 20m

Porto

Tue 11/3

12:05 pm-9:02 pm

2 stops40h 57m

$734

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Sun 10/18

7:10 am-10:25 am

2 stops19h 15m

Porto

Tue 11/3

11:15 am-11:40 am

1 stop32h 25m

$735

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 2/8

5:45 pm-8:00 pm

2 stops18h 15m

Porto

Mon 2/15

12:25 pm-7:42 pm

2 stops39h 17m

$754

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 3/1

7:00 am-9:30 am

2 stops18h 30m

Porto

Fri 3/5

12:35 pm-10:12 am

2 stops29h 37m

$760

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 3/1

10:59 pm-9:30 am

2 stops26h 31m

Porto

Fri 3/5

12:35 pm-11:53 am

2 stops31h 18m

$760

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Wed 11/11

5:45 pm-4:50 pm

1 stop15h 05m

Porto

Sun 11/15

8:20 am-7:47 pm

2 stops19h 27m

$782

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Fri 10/23

7:00 am-10:30 am

1 stop19h 30m

Porto

Mon 11/2

5:00 am-11:20 am

1 stop14h 20m

$838

Quickest round-trip

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Sat 10/10

1:05 pm-3:30 pm

1 stop18h 25m

Porto

Sat 10/17

5:00 am-11:10 am

1 stop14h 10m

$977

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

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 $857 to $1,097.
The lowest price recently found on this route was $734.

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 November instead. Flights to Porto in November, while not as cheap as those in January, still average around $542.

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

Best Price Found	$369
Fastest flight time	14h 49m
Direct flights	None

The best one-way flight to Porto from Portland in the past 72 hours is $369. The best round-trip flight deal from Portland to Porto found on momondo in the last 72 hours is $734.

The fastest flight from Portland to Porto takes 14h 49m

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 49m, 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?
As of September 2026, there are 3 operators available to choose from 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?
momondo data reveals that the most frequently booked airline on the route from Portland to Porto is KLM, representing 40% of all bookings. The subsequent popular airlines are Delta at 37% and United Airlines at 23%.

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
Delta	PriceFrom $494	Free Cancellation	Rating 7.8 8,557 reviews	Search Delta flights
KLM	PriceFrom $498	Free Cancellation	Rating 7.8 1,569 reviews	Search KLM flights
United Airlines	PriceFrom $502	Free Cancellation	Rating 7.4 10,173 reviews	Search United Airlines flights

Coimbra

Vila Nova de Gaia

Aveiro

Braga

Pinhao

Matosinhos

Esposende

Chaves

Arcos de Valdevez

Viseu

Espinho

Guimarães

Lamego

Ponte de Lima

Penafiel

Caminha

Baiao

Mira

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.

An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Airports servicing Portugal

Faro Airport

Lisbon Humberto Delgado Airport

Azores Airport

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Cheap flights from Portland to Porto from $369

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 12/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Delta flights from Portland to Porto

Our best Delta deals on Portland to Porto flight tickets

United Airlines flights from Portland to Porto

Our best United Airlines deals on Portland to Porto flight tickets

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See travel insights to Porto from

How to get the cheapest flight ticket from Portland to Porto

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

What is the cheapest month to fly to Porto?

Can stopping save me money on Portland to Porto flights?

What is the cheapest airline that flies from Portland to Porto?

What airlines fly to Porto?

Which airport is the most popular layover for flights between Portland and Porto?

Which layover airport offers the lowest fares from Portland to Porto?

Which layover airport has the shortest travel time from Portland to Porto?

Which layover airport has the shortest connection time from Portland to Porto?

When to book flights from Portland to Porto

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying 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

Traveling to a place near Porto?

Why use momondo?

An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Airports servicing Portugal

Fly your favorite airline to Porto

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Porto

List of cabin classes available on flights landing in Porto. Availability may vary depending on flight origin and airline.

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

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