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Cheap flights from Portland to Porto from $324

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 3/7. 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
10:00 am - 10:30 am
PDX
-
OPO
16h 30m2 stops
Multiple Airlines Logo
9:25 am - 11:25 am
OPO
-
PDX
34h 00m1 stop
$479Multiple Airlines
Sun, Jan 25 - Sat, Feb 7
KLM Logo
1:05 pm - 10:55 am
PDX
-
OPO
13h 50m1 stop
KLM Logo
11:45 am - 11:10 am
OPO
-
PDX
31h 25m1 stop
$483KLM
Sun, Apr 19 - Tue, Apr 28
Delta Logo
1:25 pm - 3:25 pm
PDX
-
OPO
18h 00m1 stop
Delta Logo
11:15 am - 11:25 am
OPO
-
PDX
32h 10m1 stop
$485Delta
Sun, Jan 25 - Sat, Feb 7
KLM Logo
3:18 pm - 3:30 pm
PDX
-
OPO
16h 12m2 stops
KLM Logo
7:00 pm - 11:10 am
OPO
-
PDX
24h 10m1 stop
$488KLM
Sun, Apr 19 - Mon, Apr 27
Delta Logo
7:00 am - 10:25 am
PDX
-
OPO
19h 25m2 stops
Delta Logo
5:00 am - 3:11 pm
OPO
-
PDX
18h 11m2 stops
$493Delta
Thu, Feb 5 - Fri, Feb 20
United Airlines Logo
7:45 am - 2:45 pm
PDX
-
OPO
23h 00m2 stops
United Airlines Logo
6:00 am - 2:46 pm
OPO
-
PDX
40h 46m2 stops
$507United Airlines
Thu, Jan 29 - Mon, Feb 2
British Airways Logo
7:30 pm - 8:20 pm
PDX
-
OPO
16h 50m1 stop
British Airways Logo
12:25 pm - 5:40 pm
OPO
-
PDX
37h 15m2 stops
$535British Airways
Sun, Apr 19 - Tue, Apr 28
Delta Logo
1:32 pm - 6:10 pm
PDX
-
OPO
20h 38m2 stops
Delta Logo
5:00 am - 11:10 am
OPO
-
PDX
14h 10m1 stop
$538Delta
Thu, Apr 16 - Thu, Apr 30
Multiple Airlines Logo
7:00 am - 10:30 am
PDX
-
OPO
19h 30m2 stops
Multiple Airlines Logo
7:00 pm - 11:10 am
OPO
-
PDX
24h 10m1 stop
$582Multiple Airlines
Wed, Mar 4 - Tue, Mar 31
British Airways Logo
7:30 pm - 8:20 pm
PDX
-
OPO
16h 50m1 stop
British Airways Logo
9:25 pm - 5:40 pm
OPO
-
PDX
28h 15m1 stop
$583British Airways
Sun, Apr 26 - Sun, May 3

United Airlines flights from Portland to Porto

Our best United Airlines deals on Portland to Porto flight tickets
United Airlines
Mar 2
PDX5:05 amPortland
20h 25m
2 stops
OPO9:30 amPorto
Mar 10
OPO12:30 pmPorto
31h 03m
2 stops
PDX12:33 pmPortland
$491
Find similar
United Airlines
Feb 28
PDX7:00 amPortland
18h 30m
2 stops
OPO9:30 amPorto
Mar 11
OPO12:35 pmPorto
19h 00m
2 stops
PDX12:35 amPortland
$500
Find similar
United Airlines
Jan 29
PDX7:45 amPortland
23h 00m
2 stops
OPO2:45 pmPorto
Feb 2
OPO6:00 amPorto
40h 46m
2 stops
PDX2:46 pmPortland
$507
Find similar

Delta flights from Portland to Porto

Our best Delta deals on Portland to Porto flight tickets
Delta
Jan 25
PDX7:00 amPortland
19h 30m
2 stops
OPO10:30 amPorto
Feb 7
OPO11:15 amPorto
32h 10m
1 stop
PDX11:25 amPortland
$479
Find similar
Delta
Mar 1
PDX6:00 amPortland
20h 30m
2 stops
OPO10:30 amPorto
Mar 13
OPO5:00 amPorto
14h 25m
1 stop
PDX12:25 pmPortland
$483
Find similar
Delta
Feb 27
PDX1:25 pmPortland
13h 05m
1 stop
OPO10:30 amPorto
Mar 12
OPO11:15 amPorto
32h 10m
1 stop
PDX12:25 pmPortland
$485
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 December 28, 2025.
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

Sun 1/25

10:00 am-10:30 am

2 stops16h 30m

Porto

Sat 2/7

9:25 am-11:25 am

1 stop34h 00m

$479

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 4/19

1:05 pm-10:55 am

1 stop13h 50m

Porto

Tue 4/28

11:45 am-11:10 am

1 stop31h 25m

$483

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 1/25

1:25 pm-3:25 pm

1 stop18h 00m

Porto

Sat 2/7

11:15 am-11:25 am

1 stop32h 10m

$485

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 4/19

3:18 pm-3:30 pm

2 stops16h 12m

Porto

Mon 4/27

7:00 pm-11:10 am

1 stop24h 10m

$488

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 2/5

7:00 am-10:25 am

2 stops19h 25m

Porto

Fri 2/20

5:00 am-3:11 pm

2 stops18h 11m

$493

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 1/29

7:45 am-2:45 pm

2 stops23h 00m

Porto

Mon 2/2

6:00 am-2:46 pm

2 stops40h 46m

$507

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 4/19

7:30 pm-8:20 pm

1 stop16h 50m

Porto

Tue 4/28

12:25 pm-5:40 pm

2 stops37h 15m

$535

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 4/16

1:32 pm-6:10 pm

2 stops20h 38m

Porto

Thu 4/30

5:00 am-11:10 am

1 stop14h 10m

$538

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 3/4

7:00 am-10:30 am

2 stops19h 30m

Porto

Tue 3/31

7:00 pm-11:10 am

1 stop24h 10m

$582

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 4/26

7:30 pm-8:20 pm

1 stop16h 50m

Porto

Sun 5/3

9:25 pm-5:40 pm

1 stop28h 15m

$583

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 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 $998 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

19h 25m

Direct flights

None
The fastest flight from Portland to Porto takes 19h 25m
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 19h 25m, 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
8,021 reviews
Search Delta flights
United AirlinesPriceFrom $644Free CancellationRating
7.4
9,116 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
Aveiro
Matosinhos
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.

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