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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 4/9. 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.
Delta Logo
2:25 pm - 10:30 am
PDX
-
OPO
13h 05m
1 stop
Delta Logo
11:15 am - 12:25 pm
OPO
-
PDX
32h 10m
1 stop
$486Delta
Mon, Mar 9 - Tue, Mar 17
Delta Logo
10:30 pm - 3:25 pm
PDX
-
OPO
33h 55m
2 stops
Delta Logo
11:15 am - 12:25 pm
OPO
-
PDX
32h 10m
1 stop
$490Delta
Sun, Mar 8 - Tue, Mar 17
United Airlines Logo
11:28 pm - 9:30 am
PDX
-
OPO
26h 02m
2 stops
United Airlines Logo
12:30 pm - 6:47 pm
OPO
-
PDX
37h 17m
2 stops
$492United Airlines
Sat, Mar 7 - Tue, Mar 17
Multiple Airlines Logo
7:05 pm - 11:25 pm
PDX
-
OPO
44h 20m
2 stops
Multiple Airlines Logo
6:20 am - 12:44 am
OPO
-
PDX
26h 24m
2 stops
$493Multiple Airlines
Sat, Apr 18 - Tue, Apr 28
Lufthansa Logo
3:45 pm - 11:40 pm
PDX
-
OPO
23h 55m
2 stops
Lufthansa Logo
6:15 am - 12:35 am
OPO
-
PDX
25h 20m
2 stops
$497Lufthansa
Sat, Mar 7 - Sat, Mar 14
SWISS Logo
1:39 pm - 6:30 pm
PDX
-
OPO
21h 51m
2 stops
SWISS Logo
7:25 pm - 11:04 pm
OPO
-
PDX
34h 39m
2 stops
$499SWISS
Tue, Mar 10 - Tue, Mar 17
Multiple Airlines Logo
3:15 pm - 3:40 pm
PDX
-
OPO
40h 25m
2 stops
Multiple Airlines Logo
8:40 am - 10:29 pm
OPO
-
PDX
21h 49m
2 stops
$505Multiple Airlines
Tue, Apr 7 - Tue, Apr 21
United Airlines Logo
11:59 pm - 11:15 am
PDX
-
OPO
27h 16m
2 stops
United Airlines Logo
6:00 am - 12:44 am
OPO
-
PDX
26h 44m
2 stops
$508United Airlines
Sun, Apr 12 - Fri, Apr 24
United Airlines Logo
11:59 pm - 3:40 pm
PDX
-
OPO
31h 41m
2 stops
United Airlines Logo
12:35 pm - 11:44 am
OPO
-
PDX
31h 09m
3 stops
$521United Airlines
Sun, Apr 12 - Fri, Apr 24
Lufthansa Logo
7:30 am - 11:40 pm
PDX
-
OPO
32h 10m
2 stops
Lufthansa Logo
6:15 am - 12:35 am
OPO
-
PDX
25h 20m
2 stops
$528Lufthansa
Sat, Mar 7 - Sat, Mar 14

Iberia flights from Portland to Porto

Our best Iberia deals on Portland to Porto flight tickets
Iberia
Apr 16
PDX10:35 amPortland
21h 25m
2 stops
OPO4:00 pmPorto
Apr 30
OPO8:20 amPorto
23h 34m
2 stops
PDX11:54 pmPortland
$650
Iberia
Apr 9
PDX10:35 amPortland
25h 25m
2 stops
OPO8:00 pmPorto
Apr 13
OPO8:40 pmPorto
56h 58m
2 stops
PDX9:38 pmPortland
$667

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 21
OPO4:20 pmPorto
26h 50m
1 stop
PDX11:10 amPortland
$669
KLM
Mar 4
PDX1:25 pmPortland
21h 55m
1 stop
OPO7:20 pmPorto
Mar 8
OPO5:00 amPorto
14h 25m
1 stop
PDX11:25 amPortland
$685
KLM
Apr 9
PDX1:05 pmPortland
22h 10m
1 stop
OPO7:15 pmPorto
Apr 14
OPO4:20 pmPorto
26h 50m
1 stop
PDX11:10 amPortland
$719

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 8, 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 3/9

2:25 pm-10:30 am

1 stop13h 05m

Porto

Tue 3/17

11:15 am-12:25 pm

1 stop32h 10m

$486

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 3/8

10:30 pm-3:25 pm

2 stops33h 55m

Porto

Tue 3/17

11:15 am-12:25 pm

1 stop32h 10m

$490

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 3/7

11:28 pm-9:30 am

2 stops26h 02m

Porto

Tue 3/17

12:30 pm-6:47 pm

2 stops37h 17m

$492

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 4/18

7:05 pm-11:25 pm

2 stops44h 20m

Porto

Tue 4/28

6:20 am-12:44 am

2 stops26h 24m

$493

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 3/7

3:45 pm-11:40 pm

2 stops23h 55m

Porto

Sat 3/14

6:15 am-12:35 am

2 stops25h 20m

$497

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 3/10

1:39 pm-6:30 pm

2 stops21h 51m

Porto

Tue 3/17

7:25 pm-11:04 pm

2 stops34h 39m

$499

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/7

3:15 pm-3:40 pm

2 stops40h 25m

Porto

Tue 4/21

8:40 am-10:29 pm

2 stops21h 49m

$505

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 4/12

11:59 pm-11:15 am

2 stops27h 16m

Porto

Fri 4/24

6:00 am-12:44 am

2 stops26h 44m

$508

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 4/12

11:59 pm-3:40 pm

2 stops31h 41m

Porto

Fri 4/24

12:35 pm-11:44 am

3 stops31h 09m

$521

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 3/7

7:30 am-11:40 pm

2 stops32h 10m

Porto

Sat 3/14

6:15 am-12:35 am

2 stops25h 20m

$528

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 $942 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 $652 on momondo.

Can stopping save me money on Portland to Porto flights?

You could potentially save up to 4% 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

15h 45m

Direct flights

None
The fastest flight from Portland to Porto takes 15h 45m
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 15h 45m, 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
8,172 reviews
Search Delta flights
KLMPriceFrom $498Free CancellationRating
7.7
1,450 reviews
Search KLM flights
United AirlinesPriceFrom $591Free CancellationRating
7.4
9,254 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
Esposende
Lamego
Guimarães
Espinho
Chaves
Pinhao
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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