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Cheap flights from Portland to Porto from $245

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 4/27. 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.
Delta Logo
1:05 pm - 3:30 pm
PDX
-
OPO
18h 25m
1 stop
Delta Logo
11:25 am - 11:10 am
OPO
-
PDX
31h 45m
1 stop
$699Delta
Sun, Apr 12 - Mon, Apr 27
KLM Logo
1:05 pm - 3:30 pm
PDX
-
OPO
18h 25m
1 stop
KLM Logo
5:00 am - 11:10 am
OPO
-
PDX
14h 10m
1 stop
$703KLM
Tue, Apr 14 - Tue, Apr 28
Delta Logo
1:32 pm - 6:20 pm
PDX
-
OPO
20h 48m
2 stops
Delta Logo
5:00 am - 11:10 am
OPO
-
PDX
14h 10m
1 stop
$708Delta
Tue, Apr 14 - Tue, Apr 28
Delta Logo
1:32 pm - 6:20 pm
PDX
-
OPO
20h 48m
2 stops
Delta Logo
5:00 am - 2:53 pm
OPO
-
PDX
17h 53m
2 stops
$717Delta
Tue, Apr 14 - Tue, Apr 28
Delta Logo
5:36 pm - 10:00 pm
PDX
-
OPO
44h 24m
2 stops
Delta Logo
5:00 am - 11:56 pm
OPO
-
PDX
26h 56m
2 stops
$748Delta
Sun, Apr 12 - Mon, Apr 27
KLM Logo
1:05 pm - 10:15 pm
PDX
-
OPO
25h 10m
1 stop
KLM Logo
7:10 pm - 11:10 am
OPO
-
PDX
24h 00m
1 stop
$777KLM
Thu, Apr 16 - Thu, Apr 30
KLM Logo
1:05 pm - 6:20 pm
PDX
-
OPO
21h 15m
1 stop
KLM Logo
7:00 pm - 11:10 am
OPO
-
PDX
24h 10m
1 stop
$783KLM
Tue, Apr 28 - Tue, May 12
Delta Logo
1:05 pm - 3:30 pm
PDX
-
OPO
18h 25m
1 stop
Delta Logo
5:00 am - 5:10 pm
OPO
-
PDX
20h 10m
2 stops
$787Delta
Thu, Apr 16 - Thu, Apr 30
KLM Logo
1:05 pm - 6:20 pm
PDX
-
OPO
21h 15m
1 stop
KLM Logo
5:00 am - 2:48 pm
OPO
-
PDX
17h 48m
2 stops
$793KLM
Wed, May 6 - Thu, May 21
Multiple Airlines Logo
1:05 pm - 10:15 pm
PDX
-
OPO
25h 10m
1 stop
Multiple Airlines Logo
6:15 am - 5:15 pm
OPO
-
PDX
19h 00m
2 stops
$800Multiple Airlines
Tue, Apr 28 - Tue, May 12

United Airlines flights from Portland to Porto

Our best United Airlines deals on Portland to Porto flight tickets
United Airlines
Apr 15
PDX7:15 amPortland
24h 25m
2 stops
OPO3:40 pmPorto
Apr 22
OPO6:00 amPorto
24h 58m
2 stops
PDX10:58 pmPortland
$812
United Airlines
Apr 15
PDX7:15 amPortland
24h 25m
2 stops
OPO3:40 pmPorto
Apr 22
OPO12:35 pmPorto
17h 24m
1 stop
PDX9:59 pmPortland
$821
United Airlines
May 4
PDX5:30 amPortland
26h 10m
2 stops
OPO3:40 pmPorto
May 18
OPO6:00 amPorto
35h 38m
2 stops
PDX9:38 amPortland
$875

Lufthansa flights from Portland to Porto

Our best Lufthansa deals on Portland to Porto flight tickets
Lufthansa
Apr 24
PDX3:30 pmPortland
23h 55m
2 stops
OPO11:25 pmPorto
May 10
OPO6:00 amPorto
20h 45m
2 stops
PDX6:45 pmPortland
$895
Lufthansa
Apr 16
PDX7:15 amPortland
32h 10m
2 stops
OPO11:25 pmPorto
Apr 30
OPO12:10 pmPorto
19h 49m
2 stops
PDX11:59 pmPortland
$937
Lufthansa
Apr 24
PDX3:30 pmPortland
23h 55m
2 stops
OPO11:25 pmPorto
May 10
OPO6:00 amPorto
25h 55m
2 stops
PDX11:55 pmPortland
$950

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 March 6, 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

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 4/12

1:05 pm-3:30 pm

1 stop18h 25m

Porto

Mon 4/27

11:25 am-11:10 am

1 stop31h 45m

$699
Quickest round-trip

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/14

1:05 pm-3:30 pm

1 stop18h 25m

Porto

Tue 4/28

5:00 am-11:10 am

1 stop14h 10m

$703

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/14

1:32 pm-6:20 pm

2 stops20h 48m

Porto

Tue 4/28

5:00 am-11:10 am

1 stop14h 10m

$708

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/14

1:32 pm-6:20 pm

2 stops20h 48m

Porto

Tue 4/28

5:00 am-2:53 pm

2 stops17h 53m

$717

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 4/12

5:36 pm-10:00 pm

2 stops44h 24m

Porto

Mon 4/27

5:00 am-11:56 pm

2 stops26h 56m

$748

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 4/16

1:05 pm-10:15 pm

1 stop25h 10m

Porto

Thu 4/30

7:10 pm-11:10 am

1 stop24h 00m

$777

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/28

1:05 pm-6:20 pm

1 stop21h 15m

Porto

Tue 5/12

7:00 pm-11:10 am

1 stop24h 10m

$783

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 4/16

1:05 pm-3:30 pm

1 stop18h 25m

Porto

Thu 4/30

5:00 am-5:10 pm

2 stops20h 10m

$787

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 5/6

1:05 pm-6:20 pm

1 stop21h 15m

Porto

Thu 5/21

5:00 am-2:48 pm

2 stops17h 48m

$793

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/28

1:05 pm-10:15 pm

1 stop25h 10m

Porto

Tue 5/12

6:15 am-5:15 pm

2 stops19h 00m

$800

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

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 $925 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 5% 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

13h 35m

Direct flights

None
The fastest flight from Portland to Porto takes 13h 35m
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 13h 35m, 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
8,260 reviews
Search Delta flights
KLMPriceFrom $498Free CancellationRating
7.8
1,467 reviews
Search KLM flights
United AirlinesPriceFrom $537Free CancellationRating
7.4
9,403 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
Matosinhos
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.

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