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Cheap flights from Portland to Porto from $320

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 3/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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.
Multiple Airlines Logo
7:00 am - 10:25 am
PDX
-
OPO
19h 25m2 stops
Multiple Airlines Logo
4:10 pm - 11:25 am
OPO
-
PDX
27h 15m1 stop
$479Multiple Airlines
Thu, Feb 19 - Thu, Feb 26
Delta Logo
9:05 am - 10:05 pm
PDX
-
OPO
29h 00m2 stops
Delta Logo
5:00 am - 11:10 am
OPO
-
PDX
14h 10m1 stop
$482Delta
Tue, Apr 7 - Thu, Apr 23
Delta Logo
7:05 am - 10:05 pm
PDX
-
OPO
31h 00m2 stops
Delta Logo
11:45 am - 11:10 am
OPO
-
PDX
31h 25m1 stop
$483Delta
Tue, Apr 7 - Thu, Apr 23
KLM Logo
1:05 pm - 10:15 pm
PDX
-
OPO
25h 10m1 stop
KLM Logo
4:20 pm - 11:10 am
OPO
-
PDX
26h 50m1 stop
$484KLM
Tue, Apr 7 - Thu, Apr 23
KLM Logo
1:25 pm - 3:25 pm
PDX
-
OPO
18h 00m1 stop
KLM Logo
5:00 am - 11:25 am
OPO
-
PDX
14h 25m1 stop
$485KLM
Fri, Feb 20 - Mon, Mar 2
Delta Logo
11:51 am - 6:10 pm
PDX
-
OPO
22h 19m2 stops
Delta Logo
11:45 am - 11:10 am
OPO
-
PDX
31h 25m1 stop
$488Delta
Mon, Apr 20 - Mon, Apr 27
KLM Logo
1:27 pm - 3:25 pm
PDX
-
OPO
17h 58m2 stops
KLM Logo
5:00 am - 11:25 am
OPO
-
PDX
14h 25m1 stop
$489KLM
Fri, Feb 20 - Mon, Mar 2
KLM Logo
1:27 pm - 3:25 pm
PDX
-
OPO
17h 58m2 stops
KLM Logo
4:10 pm - 11:25 am
OPO
-
PDX
27h 15m1 stop
$490KLM
Mon, Feb 16 - Sun, Feb 22
United Airlines Logo
11:59 pm - 9:45 am
PDX
-
OPO
25h 46m2 stops
United Airlines Logo
6:00 am - 12:26 pm
OPO
-
PDX
38h 26m2 stops
$491United Airlines
Sat, Apr 18 - Tue, Apr 28
Delta Logo
1:32 pm - 10:05 pm
PDX
-
OPO
24h 33m2 stops
Delta Logo
5:00 am - 10:05 am
OPO
-
PDX
37h 05m2 stops
$492Delta
Tue, Apr 21 - Thu, Apr 30

KLM flights from Portland to Porto

Our best KLM deals on Portland to Porto flight tickets
KLM
Apr 7
PDX1:05 pmPortland
25h 10m
1 stop
OPO10:15 pmPorto
Apr 23
OPO4:20 pmPorto
26h 50m
1 stop
PDX11:10 amPortland
$484
Find similar
KLM
Feb 20
PDX1:25 pmPortland
13h 05m
1 stop
OPO10:30 amPorto
Mar 2
OPO5:00 amPorto
14h 25m
1 stop
PDX11:25 amPortland
$485
Find similar
KLM
Feb 16
PDX1:27 pmPortland
17h 58m
2 stops
OPO3:25 pmPorto
Feb 22
OPO4:10 pmPorto
27h 15m
1 stop
PDX11:25 amPortland
$490
Find similar

Lufthansa flights from Portland to Porto

Our best Lufthansa deals on Portland to Porto flight tickets
Lufthansa
Apr 7
PDX2:10 pmPortland
25h 15m
2 stops
OPO11:25 pmPorto
Apr 22
OPO6:00 amPorto
24h 29m
2 stops
PDX10:29 pmPortland
$495
Find similar
Lufthansa
Apr 7
PDX2:10 pmPortland
25h 15m
2 stops
OPO11:25 pmPorto
Apr 21
OPO11:05 amPorto
21h 39m
2 stops
PDX12:44 amPortland
$497
Find similar
Lufthansa
Apr 7
PDX2:10 pmPortland
25h 15m
2 stops
OPO11:25 pmPorto
Apr 26
OPO6:20 amPorto
26h 24m
2 stops
PDX12:44 amPortland
$547
Find similar

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 January 2, 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

Thu 2/19

7:00 am-10:25 am

2 stops19h 25m

Porto

Thu 2/26

4:10 pm-11:25 am

1 stop27h 15m

$479

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/7

9:05 am-10:05 pm

2 stops29h 00m

Porto

Thu 4/23

5:00 am-11:10 am

1 stop14h 10m

$482

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/7

7:05 am-10:05 pm

2 stops31h 00m

Porto

Thu 4/23

11:45 am-11:10 am

1 stop31h 25m

$483

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/7

1:05 pm-10:15 pm

1 stop25h 10m

Porto

Thu 4/23

4:20 pm-11:10 am

1 stop26h 50m

$484

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 2/20

1:25 pm-3:25 pm

1 stop18h 00m

Porto

Mon 3/2

5:00 am-11:25 am

1 stop14h 25m

$485

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 4/20

11:51 am-6:10 pm

2 stops22h 19m

Porto

Mon 4/27

11:45 am-11:10 am

1 stop31h 25m

$488

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 2/20

1:27 pm-3:25 pm

2 stops17h 58m

Porto

Mon 3/2

5:00 am-11:25 am

1 stop14h 25m

$489

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 2/16

1:27 pm-3:25 pm

2 stops17h 58m

Porto

Sun 2/22

4:10 pm-11:25 am

1 stop27h 15m

$490

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 4/18

11:59 pm-9:45 am

2 stops25h 46m

Porto

Tue 4/28

6:00 am-12:26 pm

2 stops38h 26m

$491

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/21

1:32 pm-10:05 pm

2 stops24h 33m

Porto

Thu 4/30

5:00 am-10:05 am

2 stops37h 05m

$492

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 December is, on average, the cheapest month to fly to Porto from Portland, with most prices found around $589. If you aren’t able to travel during the month of December, then book flights to Porto from Portland during November instead. Flights to Porto in November, while not as cheap as those in December, still average around $669.

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 $999 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 $800 on momondo.

Can stopping save me money on Portland to Porto flights?

You could potentially save up to 31% 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 15m

Direct flights

None
The fastest flight from Portland to Porto takes 14h 15m
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 14h 15m, 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
KLMPriceFrom $498Free CancellationRating
7.7
1,435 reviews
Search KLM flights
DeltaPriceFrom $498Free CancellationRating
7.9
8,017 reviews
Search Delta flights
United AirlinesPriceFrom $644Free CancellationRating
7.4
9,132 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
Guimarães
Esposende
Lamego
Chaves
Viseu
Espinho
Arcos de Valdevez
Pinhao
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

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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