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Cheap flights from Portland to Porto from $255

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 4/14. 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 Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Iberia Logo
6:00 am - 4:00 pm
PDX
-
OPO
26h 00m
2 stops
Iberia Logo
8:40 pm - 9:38 pm
OPO
-
PDX
32h 58m
2 stops
$512Iberia
Mon, Apr 27 - Wed, May 6
KLM Logo
1:05 pm - 3:30 pm
PDX
-
OPO
18h 25m
1 stop
KLM Logo
11:45 am - 11:10 am
OPO
-
PDX
31h 25m
1 stop
$535KLM
Thu, Apr 9 - Wed, Apr 22
KLM Logo
1:05 pm - 10:40 am
PDX
-
OPO
13h 35m
1 stop
KLM Logo
5:00 am - 5:10 pm
OPO
-
PDX
20h 10m
2 stops
$544KLM
Thu, Apr 9 - Wed, Apr 22
British Airways Logo
1:52 pm - 7:50 pm
PDX
-
OPO
21h 58m
2 stops
British Airways Logo
8:20 pm - 5:40 pm
OPO
-
PDX
29h 20m
1 stop
$570British Airways
Mon, Apr 27 - Wed, May 6
Delta Logo
1:05 pm - 10:40 am
PDX
-
OPO
13h 35m
1 stop
Delta Logo
11:45 am - 11:10 am
OPO
-
PDX
31h 25m
1 stop
$584Delta
Thu, Apr 9 - Sat, Apr 25
Multiple Airlines Logo
6:22 am - 8:20 pm
PDX
-
OPO
29h 58m
2 stops
Multiple Airlines Logo
4:40 pm - 5:40 pm
OPO
-
PDX
33h 00m
2 stops
$632Multiple Airlines
Thu, Apr 9 - Sat, Apr 25
United Airlines Logo
11:10 pm - 9:30 am
PDX
-
OPO
27h 20m
2 stops
United Airlines Logo
6:00 am - 3:09 pm
OPO
-
PDX
41h 09m
2 stops
$638United Airlines
Tue, Mar 17 - Tue, Mar 31
KLM Logo
1:05 pm - 7:15 pm
PDX
-
OPO
22h 10m
1 stop
KLM Logo
5:00 am - 4:07 pm
OPO
-
PDX
19h 07m
2 stops
$644KLM
Thu, Apr 9 - Wed, Apr 22
United Airlines Logo
2:05 pm - 9:30 am
PDX
-
OPO
36h 25m
2 stops
United Airlines Logo
6:00 am - 6:34 pm
OPO
-
PDX
44h 34m
2 stops
$649United Airlines
Tue, Mar 17 - Tue, Mar 31
Multiple Airlines Logo
1:05 pm - 7:15 pm
PDX
-
OPO
22h 10m
1 stop
Multiple Airlines Logo
5:55 am - 5:32 pm
OPO
-
PDX
19h 37m
2 stops
$651Multiple Airlines
Thu, Apr 9 - Wed, May 6

Iberia flights from Portland to Porto

Our best Iberia deals on Portland to Porto flight tickets
Iberia
Apr 27
PDX6:00 amPortland
26h 00m
2 stops
OPO4:00 pmPorto
May 6
OPO8:40 pmPorto
32h 58m
2 stops
PDX9:38 pmPortland
$512
Iberia
Apr 28
PDX1:52 pmPortland
22h 08m
2 stops
OPO8:00 pmPorto
May 11
OPO8:40 pmPorto
34h 09m
2 stops
PDX10:49 pmPortland
$657
Iberia
Apr 28
PDX1:52 pmPortland
18h 08m
2 stops
OPO4:00 pmPorto
May 20
OPO8:20 amPorto
17h 20m
2 stops
PDX5:40 pmPortland
$782

British Airways flights from Portland to Porto

Our best British Airways deals on Portland to Porto flight tickets
British Airways
Apr 27
PDX1:52 pmPortland
21h 58m
2 stops
OPO7:50 pmPorto
May 6
OPO8:20 pmPorto
29h 20m
1 stop
PDX5:40 pmPortland
$570
British Airways
Apr 27
PDX7:30 pmPortland
16h 20m
1 stop
OPO7:50 pmPorto
May 6
OPO8:20 pmPorto
29h 20m
1 stop
PDX5:40 pmPortland
$690
British Airways
Apr 28
PDX7:30 pmPortland
29h 35m
1 stop
OPO9:05 amPorto
May 20
OPO8:20 pmPorto
29h 20m
1 stop
PDX5:40 pmPortland
$805

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 February 19, 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

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 4/27

6:00 am-4:00 pm

2 stops26h 00m

Porto

Wed 5/6

8:40 pm-9:38 pm

2 stops32h 58m

$512

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 4/9

1:05 pm-3:30 pm

1 stop18h 25m

Porto

Wed 4/22

11:45 am-11:10 am

1 stop31h 25m

$535

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 4/9

1:05 pm-10:40 am

1 stop13h 35m

Porto

Wed 4/22

5:00 am-5:10 pm

2 stops20h 10m

$544

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 4/27

1:52 pm-7:50 pm

2 stops21h 58m

Porto

Wed 5/6

8:20 pm-5:40 pm

1 stop29h 20m

$570

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 4/9

1:05 pm-10:40 am

1 stop13h 35m

Porto

Sat 4/25

11:45 am-11:10 am

1 stop31h 25m

$584

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 4/9

6:22 am-8:20 pm

2 stops29h 58m

Porto

Sat 4/25

4:40 pm-5:40 pm

2 stops33h 00m

$632

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 3/17

11:10 pm-9:30 am

2 stops27h 20m

Porto

Tue 3/31

6:00 am-3:09 pm

2 stops41h 09m

$638

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 4/9

1:05 pm-7:15 pm

1 stop22h 10m

Porto

Wed 4/22

5:00 am-4:07 pm

2 stops19h 07m

$644

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 3/17

2:05 pm-9:30 am

2 stops36h 25m

Porto

Tue 3/31

6:00 am-6:34 pm

2 stops44h 34m

$649

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 4/9

1:05 pm-7:15 pm

1 stop22h 10m

Porto

Wed 5/6

5:55 am-5:32 pm

2 stops19h 37m

$651

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 Porto from

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 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.

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 $935 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 $740 on momondo.

Can stopping save me money on Portland to Porto flights?

You could potentially save up to 14% 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

17h 50m

Direct flights

None
The fastest flight from Portland to Porto takes 17h 50m
There are no direct flights from Portland to Porto. There are no popular flight routes from Portland to Porto.
Search flight deals

  • 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 17h 50m, 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
7.9
8,212 reviews
Search Delta flights
KLMPriceFrom $498Free CancellationRating
7.7
1,459 reviews
Search KLM flights
United AirlinesPriceFrom $537Free CancellationRating
7.4
9,322 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
Matosinhos
Braga
Aveiro
Esposende
Lamego
Guimarães
Pinhao
Chaves
Espinho
Arcos de Valdevez
Viseu
Ponte de Lima
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

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