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Cheap flights from Portland to Porto from $328

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 3/9. 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
$478Multiple Airlines
Sun, Jan 18 - Sat, Jan 31
Multiple Airlines Logo
7:00 am - 10:30 am
PDX
-
OPO
19h 30m2 stops
Multiple Airlines Logo
5:00 am - 8:25 pm
OPO
-
PDX
23h 25m2 stops
$483Multiple Airlines
Sun, Jan 18 - Sat, Jan 31
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
$484KLM
Sun, Feb 15 - Sun, Mar 8
KLM Logo
7:00 am - 10:30 am
PDX
-
OPO
19h 30m2 stops
KLM Logo
11:15 am - 11:25 am
OPO
-
PDX
32h 10m1 stop
$489KLM
Sun, Feb 15 - Sat, Mar 7
United Airlines Logo
7:00 am - 9:30 am
PDX
-
OPO
18h 30m2 stops
United Airlines Logo
12:30 pm - 12:35 am
OPO
-
PDX
19h 05m2 stops
$491United Airlines
Wed, Feb 25 - Wed, Mar 11
Multiple Airlines Logo
7:00 am - 12:05 pm
PDX
-
OPO
21h 05m2 stops
Multiple Airlines Logo
6:00 am - 10:26 pm
OPO
-
PDX
24h 26m2 stops
$495Multiple Airlines
Sun, Feb 15 - Sat, Mar 7
Lufthansa Logo
3:50 pm - 10:25 pm
PDX
-
OPO
22h 35m2 stops
Lufthansa Logo
6:30 am - 6:30 pm
OPO
-
PDX
20h 00m2 stops
$498Lufthansa
Sun, Feb 15 - Fri, Mar 6
Delta Logo
6:00 am - 10:30 am
PDX
-
OPO
20h 30m2 stops
Delta Logo
5:00 am - 3:11 pm
OPO
-
PDX
18h 11m2 stops
$499Delta
Sat, Feb 14 - Fri, Mar 6
British Airways Logo
5:45 pm - 5:35 pm
PDX
-
OPO
15h 50m1 stop
British Airways Logo
5:35 pm - 3:55 pm
OPO
-
PDX
30h 20m1 stop
$531British Airways
Mon, Feb 16 - Thu, Mar 5
KLM Logo
1:25 pm - 10:30 am
PDX
-
OPO
13h 05m1 stop
KLM Logo
7:00 pm - 11:10 am
OPO
-
PDX
24h 10m1 stop
$583KLM
Wed, Mar 4 - Tue, Mar 31

KLM flights from Portland to Porto

Our best KLM deals on Portland to Porto flight tickets
KLM
Feb 15
PDX1:25 pmPortland
18h 00m
1 stop
OPO3:25 pmPorto
Mar 8
OPO5:00 amPorto
14h 25m
1 stop
PDX11:25 amPortland
$484
Find similar
KLM
Feb 15
PDX7:00 amPortland
19h 30m
2 stops
OPO10:30 amPorto
Mar 7
OPO11:15 amPorto
32h 10m
1 stop
PDX11:25 amPortland
$489
Find similar
KLM
Mar 4
PDX1:25 pmPortland
13h 05m
1 stop
OPO10:30 amPorto
Mar 31
OPO7:00 pmPorto
24h 10m
1 stop
PDX11:10 amPortland
$583
Find similar

Lufthansa flights from Portland to Porto

Our best Lufthansa deals on Portland to Porto flight tickets
Lufthansa
Feb 15
PDX3:50 pmPortland
22h 35m
2 stops
OPO10:25 pmPorto
Mar 6
OPO6:30 amPorto
20h 00m
2 stops
PDX6:30 pmPortland
$498
Find similar
Lufthansa
Feb 16
PDX7:30 amPortland
21h 20m
2 stops
OPO12:50 pmPorto
Mar 6
OPO6:30 amPorto
20h 00m
2 stops
PDX6:30 pmPortland
$586
Find similar
Lufthansa
Feb 16
PDX7:30 amPortland
21h 20m
2 stops
OPO12:50 pmPorto
Mar 7
OPO6:00 amPorto
21h 14m
2 stops
PDX7:14 pmPortland
$594
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 23, 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 1/18

10:00 am-10:30 am

2 stops16h 30m

Porto

Sat 1/31

9:25 am-11:25 am

1 stop34h 00m

$478

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 1/18

7:00 am-10:30 am

2 stops19h 30m

Porto

Sat 1/31

5:00 am-8:25 pm

2 stops23h 25m

$483

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 2/15

1:25 pm-3:25 pm

1 stop18h 00m

Porto

Sun 3/8

5:00 am-11:25 am

1 stop14h 25m

$484

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 2/15

7:00 am-10:30 am

2 stops19h 30m

Porto

Sat 3/7

11:15 am-11:25 am

1 stop32h 10m

$489

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 2/25

7:00 am-9:30 am

2 stops18h 30m

Porto

Wed 3/11

12:30 pm-12:35 am

2 stops19h 05m

$491

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 2/15

7:00 am-12:05 pm

2 stops21h 05m

Porto

Sat 3/7

6:00 am-10:26 pm

2 stops24h 26m

$495

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 2/15

3:50 pm-10:25 pm

2 stops22h 35m

Porto

Fri 3/6

6:30 am-6:30 pm

2 stops20h 00m

$498

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 2/14

6:00 am-10:30 am

2 stops20h 30m

Porto

Fri 3/6

5:00 am-3:11 pm

2 stops18h 11m

$499

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 2/16

5:45 pm-5:35 pm

1 stop15h 50m

Porto

Thu 3/5

5:35 pm-3:55 pm

1 stop30h 20m

$531

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 3/4

1:25 pm-10:30 am

1 stop13h 05m

Porto

Tue 3/31

7:00 pm-11:10 am

1 stop24h 10m

$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.

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 $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

17h 20m

Direct flights

None
The fastest flight from Portland to Porto takes 17h 20m
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 20m, 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
1,434 reviews
Search KLM flights
DeltaPriceFrom $498Free CancellationRating
7.9
8,014 reviews
Search Delta flights
United AirlinesPriceFrom $644Free CancellationRating
7.4
9,103 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.

An easier way to manage your Porto trip

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