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Cheap flights from Portland to Porto from $316

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 8/23. 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.
American Airlines Logo
5:30 am - 7:40 am
PDX
-
OPO
18h 10m
2 stops
American Airlines Logo
8:20 am - 11:51 pm
OPO
-
PDX
23h 31m
2 stops
$756American Airlines
Tue, Nov 3 - Tue, Nov 17
Scandinavian Airlines Logo
1:00 pm - 4:55 pm
PDX
-
OPO
43h 55m
2 stops
Scandinavian Airlines Logo
5:45 pm - 9:27 pm
OPO
-
PDX
35h 42m
2 stops
$760Scandinavian Airlines
Wed, Nov 4 - Fri, Nov 13
Iberia Logo
11:55 am - 4:00 pm
PDX
-
OPO
20h 05m
2 stops
Iberia Logo
8:40 pm - 9:20 pm
OPO
-
PDX
32h 40m
2 stops
$766Iberia
Wed, Oct 21 - Wed, Nov 4
United Airlines Logo
10:56 am - 9:45 am
PDX
-
OPO
14h 49m
1 stop
United Airlines Logo
6:00 am - 10:38 pm
OPO
-
PDX
24h 38m
2 stops
$802United Airlines
Wed, Oct 21 - Wed, Nov 4
United Airlines Logo
10:56 am - 9:45 am
PDX
-
OPO
14h 49m
1 stop
United Airlines Logo
12:35 pm - 9:21 pm
OPO
-
PDX
16h 46m
1 stop
$811United Airlines
Wed, Oct 21 - Wed, Nov 4
Iberia Logo
7:30 pm - 7:40 am
PDX
-
OPO
28h 10m
2 stops
Iberia Logo
8:40 pm - 9:57 pm
OPO
-
PDX
33h 17m
2 stops
$825Iberia
Mon, Sep 28 - Mon, Oct 19
Lufthansa Logo
3:30 pm - 7:00 am
PDX
-
OPO
55h 30m
2 stops
Lufthansa Logo
6:00 am - 8:49 pm
OPO
-
PDX
22h 49m
2 stops
$831Lufthansa
Mon, Sep 28 - Wed, Nov 4
United Airlines Logo
10:35 pm - 7:00 am
PDX
-
OPO
24h 25m
2 stops
United Airlines Logo
6:00 am - 10:38 pm
OPO
-
PDX
24h 38m
2 stops
$836United Airlines
Mon, Sep 28 - Thu, Nov 5
Lufthansa Logo
3:30 pm - 7:00 am
PDX
-
OPO
55h 30m
2 stops
Lufthansa Logo
12:30 pm - 10:18 pm
OPO
-
PDX
41h 48m
2 stops
$837Lufthansa
Sat, Oct 3 - Thu, Nov 5
United Airlines Logo
10:35 pm - 9:45 am
PDX
-
OPO
27h 10m
1 stop
United Airlines Logo
6:00 am - 12:02 am
OPO
-
PDX
26h 02m
2 stops
$839United Airlines
Sat, Oct 3 - Fri, Nov 6

Lufthansa flights from Portland to Porto

Our best Lufthansa deals on Portland to Porto flight tickets
Lufthansa
Sep 28
PDX3:30 pmPortland
55h 30m
2 stops
OPO7:00 amPorto
Nov 4
OPO6:00 amPorto
22h 49m
2 stops
PDX8:49 pmPortland
$831
Lufthansa
Oct 3
PDX3:30 pmPortland
55h 30m
2 stops
OPO7:00 amPorto
Nov 5
OPO12:30 pmPorto
41h 48m
2 stops
PDX10:18 pmPortland
$837
Lufthansa
Sep 30
PDX9:00 amPortland
30h 25m
2 stops
OPO11:25 pmPorto
Nov 4
OPO6:00 amPorto
22h 49m
2 stops
PDX8:49 pmPortland
$840

Iberia flights from Portland to Porto

Our best Iberia deals on Portland to Porto flight tickets
Iberia
Oct 21
PDX11:55 amPortland
20h 05m
2 stops
OPO4:00 pmPorto
Nov 4
OPO8:40 pmPorto
32h 40m
2 stops
PDX9:20 pmPortland
$766
Iberia
Sep 28
PDX7:30 pmPortland
28h 10m
2 stops
OPO7:40 amPorto
Oct 19
OPO8:40 pmPorto
33h 17m
2 stops
PDX9:57 pmPortland
$825
Iberia
Nov 4
PDX5:45 pmPortland
29h 55m
2 stops
OPO7:40 amPorto
Nov 14
OPO9:55 pmPorto
26h 00m
2 stops
PDX3:55 pmPortland
$853

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 May 12, 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

Tue 11/3

5:30 am-7:40 am

2 stops18h 10m

Porto

Tue 11/17

8:20 am-11:51 pm

2 stops23h 31m

$756

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 11/4

1:00 pm-4:55 pm

2 stops43h 55m

Porto

Fri 11/13

5:45 pm-9:27 pm

2 stops35h 42m

$760

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 10/21

11:55 am-4:00 pm

2 stops20h 05m

Porto

Wed 11/4

8:40 pm-9:20 pm

2 stops32h 40m

$766

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 10/21

10:56 am-9:45 am

1 stop14h 49m

Porto

Wed 11/4

6:00 am-10:38 pm

2 stops24h 38m

$802
Quickest round-trip

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 10/21

10:56 am-9:45 am

1 stop14h 49m

Porto

Wed 11/4

12:35 pm-9:21 pm

1 stop16h 46m

$811

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 9/28

7:30 pm-7:40 am

2 stops28h 10m

Porto

Mon 10/19

8:40 pm-9:57 pm

2 stops33h 17m

$825

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 9/28

3:30 pm-7:00 am

2 stops55h 30m

Porto

Wed 11/4

6:00 am-8:49 pm

2 stops22h 49m

$831

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 9/28

10:35 pm-7:00 am

2 stops24h 25m

Porto

Thu 11/5

6:00 am-10:38 pm

2 stops24h 38m

$836

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 10/3

3:30 pm-7:00 am

2 stops55h 30m

Porto

Thu 11/5

12:30 pm-10:18 pm

2 stops41h 48m

$837

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 10/3

10:35 pm-9:45 am

1 stop27h 10m

Porto

Fri 11/6

6:00 am-12:02 am

2 stops26h 02m

$839

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 from Portland 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 $914 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 $656 on momondo.

Can stopping save me money on Portland to Porto flights?

You could potentially save up to 40% 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 30m

Direct flights

None
The fastest flight from Portland to Porto takes 15h 30m
There are no direct flights from Portland to Porto. There are no popular flight routes from Portland to Porto.
Search flight deals

Frequently asked questions about flying from Portland to Porto

  • 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 30m, 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
8,447 reviews
Search Delta flights
KLMPriceFrom $498Free CancellationRating
7.8
1,514 reviews
Search KLM flights
United AirlinesPriceFrom $502Free CancellationRating
7.4
9,701 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
Lamego
Esposende
Chaves
Pinhao
Espinho
Guimarães
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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