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

Flights via Newark (EWR) offer the lowest average round-trip price of $842.

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

Amsterdam (AMS) has the shortest average layover time for this route: 1h 31m.

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

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

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

Amsterdam (AMS) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

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 43m.

What airlines fly to Porto?

United Airlines, KLM and Delta are the top three most popular airlines that fly to Porto from Portland according to our data. United Airlines is the first choice among our users, with 36% 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.

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 November 2025, 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.

$361 Cheap Flights from Portland to Porto in 2025/26

Q: 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 $644 to $795. The lowest price recently found on this route was $490.

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Find the cheapest flights from Portland to Porto

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7:45 pm - 11:40 pmPDX-OPO

43h 55m2 stops

1:45 pm - 6:30 pmOPO-PDX

36h 45m2 stops

$490Multiple Airlines

Find Deal

Wed, Dec 31 - Mon, Feb 2

7:00 am - 10:30 amPDX-OPO

19h 30m2 stops

6:30 am - 8:32 pmOPO-PDX

22h 02m2 stops

$491Multiple Airlines

Find Deal

Wed, Jan 14 - Fri, Feb 6

1:25 pm - 10:25 pmPDX-OPO

25h 00m1 stop

6:00 am - 10:15 pmOPO-PDX

24h 15m2 stops

$492KLM

Find Deal

Wed, Dec 31 - Wed, Jan 21

5:00 am - 11:40 amPDX-OPO

46h 40m2 stops

12:30 pm - 6:48 pmOPO-PDX

38h 18m2 stops

$594United Airlines

Find Deal

Thu, Jan 1 - Sun, Feb 1

10:10 am - 11:40 pmPDX-OPO

29h 30m2 stops

4:15 pm - 12:41 amOPO-PDX

40h 26m2 stops

$596Lufthansa

Find Deal

Wed, Dec 3 - Tue, Dec 16

5:30 am - 10:30 amPDX-OPO

21h 00m2 stops

11:25 am - 10:15 pmOPO-PDX

18h 50m2 stops

$597Delta

Find Deal

Wed, Dec 3 - Tue, Dec 16

1:25 pm - 7:20 pmPDX-OPO

21h 55m1 stop

11:25 am - 10:15 pmOPO-PDX

18h 50m2 stops

$598KLM

Find Deal

Wed, Dec 3 - Tue, Dec 16

10:10 am - 3:25 pmPDX-OPO

21h 15m2 stops

6:00 am - 12:37 amOPO-PDX

26h 37m2 stops

$602United Airlines

Find Deal

Wed, Dec 3 - Tue, Dec 16

1:14 pm - 2:45 pmPDX-OPO

17h 31m2 stops

1:45 pm - 12:39 amOPO-PDX

42h 54m2 stops

$622Lufthansa

Find Deal

Tue, Dec 9 - Sun, Jan 11

6:00 am - 10:30 amPDX-OPO

20h 30m2 stops

6:30 am - 8:52 pmOPO-PDX

22h 22m2 stops

$691Delta

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Fri, Nov 28 - Fri, Dec 12

American Airlines flights from Portland to Porto

Our best American Airlines deals on Portland to Porto flight tickets

American Airlines

Mar 15

PDX6:45 pmPortland

18h 15m

2 stops

OPO8:00 pmPorto

Mar 27

OPO8:20 amPorto

21h 16m

2 stops

PDX10:36 pmPortland

$929

Find similar

American Airlines

Dec 29

PDX12:49 amPortland

22h 51m

2 stops

OPO7:40 amPorto

Jan 21

OPO8:40 pmPorto

23h 05m

2 stops

PDX11:45 amPortland

$995

Find similar

Delta flights from Portland to Porto

Our best Delta deals on Portland to Porto flight tickets

Delta

Dec 3

PDX5:30 amPortland

21h 00m

2 stops

OPO10:30 amPorto

Dec 16

OPO11:25 amPorto

18h 50m

2 stops

PDX10:15 pmPortland

$597

Find similar

Delta

Nov 28

PDX6:00 amPortland

20h 30m

2 stops

OPO10:30 amPorto

Dec 12

OPO6:30 amPorto

22h 22m

2 stops

PDX8:52 pmPortland

$691

Find similar

Delta

Nov 12

PDX7:05 amPortland

19h 25m

2 stops

OPO10:30 amPorto

Nov 16

OPO5:00 amPorto

14h 25m

1 stop

PDX11:25 amPortland

$805

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 12/31

7:45 pm-11:40 pm

2 stops43h 55m

Porto

Mon 2/2

1:45 pm-6:30 pm

2 stops36h 45m

$490

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 1/14

7:00 am-10:30 am

2 stops19h 30m

Porto

Fri 2/6

6:30 am-8:32 pm

2 stops22h 02m

$491

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 12/31

1:25 pm-10:25 pm

1 stop25h 00m

Porto

Wed 1/21

6:00 am-10:15 pm

2 stops24h 15m

$492

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 1/1

5:00 am-11:40 am

2 stops46h 40m

Porto

Sun 2/1

12:30 pm-6:48 pm

2 stops38h 18m

$594

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 12/3

10:10 am-11:40 pm

2 stops29h 30m

Porto

Tue 12/16

4:15 pm-12:41 am

2 stops40h 26m

$596

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 12/3

5:30 am-10:30 am

2 stops21h 00m

Porto

Tue 12/16

11:25 am-10:15 pm

2 stops18h 50m

$597

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 12/3

1:25 pm-7:20 pm

1 stop21h 55m

Porto

Tue 12/16

11:25 am-10:15 pm

2 stops18h 50m

$598

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 12/3

10:10 am-3:25 pm

2 stops21h 15m

Porto

Tue 12/16

6:00 am-12:37 am

2 stops26h 37m

$602

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 12/9

1:14 pm-2:45 pm

2 stops17h 31m

Porto

Sun 1/11

1:45 pm-12:39 am

2 stops42h 54m

$622

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 11/28

6:00 am-10:30 am

2 stops20h 30m

Porto

Fri 12/12

6:30 am-8:52 pm

2 stops22h 22m

$691

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?

What is the cheapest month to fly to Porto?

The month of November is, on average, the cheapest month to fly to Porto from Portland, with most prices found around $690. If you aren’t able to travel during the month of November, then book flights to Porto from Portland during December instead. Flights to Porto in December, while not as cheap as those in November, still average around $736.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Monday when prices can be found for as low as $1,088. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $1,428. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

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

At noon is the cheapest time of day to fly from Portland to Porto when you can find flight prices for as low as $1,088. Flying to Porto at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,278 on average. Flights to Porto from Portland in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Porto?

You are more likely to see cheaper flights to Porto from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $1,025 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Portland for as low as $709 on momondo.

Can stopping save me money on Portland to Porto flights?

You could potentially save up to 15% 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

Direct flights	None

There are no direct flights from Portland to Porto. There are no popular flight routes from Portland to Porto.

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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 13h 05m, 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 November 2025, 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 United Airlines, representing 36% of all bookings. The subsequent popular airlines are KLM at 35% and Delta at 29%.

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
United Airlines	PriceFrom $647	Free Cancellation	Rating 7.4 9,003 reviews	Search United Airlines flights
KLM	PriceFrom $647	Free Cancellation	Rating 7.7 1,405 reviews	Search KLM flights
Delta	PriceFrom $709	Free Cancellation	Rating 7.9 8,004 reviews	Search Delta flights

Vila Nova de Gaia

Coimbra

Aveiro

Matosinhos

Braga

Lamego

Guimarães

Esposende

Chaves

Espinho

Viseu

Ponte de Lima

Arcos de Valdevez

Pinhao

Curia

Penafiel

Mesao Frio

Mira

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.

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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Cheap flights from Portland to Porto from $361

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 4/6. 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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Filter for what you want

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Cheap round-trip flights

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American Airlines flights from Portland to Porto

Our best American Airlines deals on Portland to Porto flight tickets

Delta flights from Portland to Porto

Our best Delta deals on Portland to Porto flight tickets

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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?

What is the cheapest month to fly to Porto?

What is the cheapest day to depart on your flight to Porto?

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

How far in advance should I book a flight to Porto?

Can stopping save me money on Portland to Porto flights?

You could potentially save up to 15% on your flight if you consider stops on a Portland to Porto flight.

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

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

What airlines fly to Porto?

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

Amsterdam (AMS) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Newark (EWR) offer the lowest average round-trip price of $842.

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 43m.

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

Amsterdam (AMS) has the shortest average layover time for this route: 1h 31m.

When to book flights from Portland to Porto

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

Direct flights

How far is Portland to Porto by plane?

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

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?

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

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

Traveling to a place near Porto?

Why use momondo?

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

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

How can momondo help me find flights 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?

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