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Cheap flights from Portland to Porto from $307

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 3/24. 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.
United Airlines Logo
11:59 pm - 9:30 am
PDX
-
OPO
25h 31m
2 stops
United Airlines Logo
12:35 pm - 9:52 pm
OPO
-
PDX
16h 17m
1 stop
$450United Airlines
Sun, Feb 22 - Wed, Mar 11
Iberia Logo
7:38 am - 8:00 pm
PDX
-
OPO
28h 22m
2 stops
Iberia Logo
9:55 pm - 11:27 pm
OPO
-
PDX
33h 32m
2 stops
$458Iberia
Tue, Feb 10 - Tue, Feb 17
American Airlines Logo
11:40 pm - 7:40 am
PDX
-
OPO
24h 00m
2 stops
American Airlines Logo
8:20 am - 12:15 am
OPO
-
PDX
22h 55m
2 stops
$461American Airlines
Sat, Feb 21 - Wed, Mar 11
Delta Logo
1:56 pm - 10:05 pm
PDX
-
OPO
24h 09m
2 stops
Delta Logo
11:45 am - 11:10 am
OPO
-
PDX
31h 25m
1 stop
$470Delta
Tue, Apr 7 - Mon, Apr 20
Multiple Airlines Logo
7:00 am - 10:30 am
PDX
-
OPO
19h 30m
2 stops
Multiple Airlines Logo
11:15 am - 11:25 am
OPO
-
PDX
32h 10m
1 stop
$471Multiple Airlines
Tue, Feb 10 - Tue, Feb 17
Multiple Airlines Logo
7:00 am - 10:30 am
PDX
-
OPO
19h 30m
2 stops
Multiple Airlines Logo
4:10 pm - 11:25 am
OPO
-
PDX
27h 15m
1 stop
$474Multiple Airlines
Wed, Feb 18 - Sat, Feb 28
United Airlines Logo
5:05 am - 9:30 am
PDX
-
OPO
20h 25m
2 stops
United Airlines Logo
12:35 pm - 9:54 am
OPO
-
PDX
29h 19m
2 stops
$475United Airlines
Thu, Feb 26 - Thu, Mar 5
Lufthansa Logo
1:39 pm - 11:25 pm
PDX
-
OPO
25h 46m
2 stops
Lufthansa Logo
6:20 am - 12:44 am
OPO
-
PDX
26h 24m
2 stops
$478Lufthansa
Tue, Apr 7 - Thu, Apr 23
Delta Logo
1:25 pm - 3:25 pm
PDX
-
OPO
18h 00m
1 stop
Delta Logo
5:00 am - 12:25 pm
OPO
-
PDX
14h 25m
1 stop
$479Delta
Sun, Feb 22 - Wed, Mar 11
Delta Logo
7:35 pm - 10:25 am
PDX
-
OPO
54h 50m
2 stops
Delta Logo
11:15 am - 11:25 am
OPO
-
PDX
32h 10m
1 stop
$481Delta
Tue, Feb 17 - Sat, Feb 28

United Airlines flights from Portland to Porto

Our best United Airlines deals on Portland to Porto flight tickets
United Airlines
Feb 22
PDX11:59 pmPortland
25h 31m
2 stops
OPO9:30 amPorto
Mar 11
OPO12:35 pmPorto
16h 17m
1 stop
PDX9:52 pmPortland
$450
United Airlines
Feb 26
PDX5:05 amPortland
20h 25m
2 stops
OPO9:30 amPorto
Mar 5
OPO12:35 pmPorto
29h 19m
2 stops
PDX9:54 amPortland
$475
United Airlines
Apr 6
PDX11:59 pmPortland
27h 11m
2 stops
OPO11:10 amPorto
Apr 23
OPO12:35 pmPorto
17h 24m
1 stop
PDX9:59 pmPortland
$490

Delta flights from Portland to Porto

Our best Delta deals on Portland to Porto flight tickets
Delta
Apr 7
PDX1:56 pmPortland
24h 09m
2 stops
OPO10:05 pmPorto
Apr 20
OPO11:45 amPorto
31h 25m
1 stop
PDX11:10 amPortland
$470
Delta
Feb 22
PDX1:25 pmPortland
18h 00m
1 stop
OPO3:25 pmPorto
Mar 11
OPO5:00 amPorto
14h 25m
1 stop
PDX12:25 pmPortland
$479
Delta
Feb 17
PDX7:35 pmPortland
54h 50m
2 stops
OPO10:25 amPorto
Feb 28
OPO11:15 amPorto
32h 10m
1 stop
PDX11:25 amPortland
$481

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 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

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 2/22

11:59 pm-9:30 am

2 stops25h 31m

Porto

Wed 3/11

12:35 pm-9:52 pm

1 stop16h 17m

$450

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 2/10

7:38 am-8:00 pm

2 stops28h 22m

Porto

Tue 2/17

9:55 pm-11:27 pm

2 stops33h 32m

$458

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 2/21

11:40 pm-7:40 am

2 stops24h 00m

Porto

Wed 3/11

8:20 am-12:15 am

2 stops22h 55m

$461

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/7

1:56 pm-10:05 pm

2 stops24h 09m

Porto

Mon 4/20

11:45 am-11:10 am

1 stop31h 25m

$470

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 2/10

7:00 am-10:30 am

2 stops19h 30m

Porto

Tue 2/17

11:15 am-11:25 am

1 stop32h 10m

$471

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 2/18

7:00 am-10:30 am

2 stops19h 30m

Porto

Sat 2/28

4:10 pm-11:25 am

1 stop27h 15m

$474

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 2/26

5:05 am-9:30 am

2 stops20h 25m

Porto

Thu 3/5

12:35 pm-9:54 am

2 stops29h 19m

$475

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/7

1:39 pm-11:25 pm

2 stops25h 46m

Porto

Thu 4/23

6:20 am-12:44 am

2 stops26h 24m

$478

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 2/22

1:25 pm-3:25 pm

1 stop18h 00m

Porto

Wed 3/11

5:00 am-12:25 pm

1 stop14h 25m

$479

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 2/17

7:35 pm-10:25 am

2 stops54h 50m

Porto

Sat 2/28

11:15 am-11:25 am

1 stop32h 10m

$481

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 $966 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

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
DeltaPriceFrom $494Free CancellationRating
7.9
8,038 reviews
Search Delta flights
KLMPriceFrom $498Free CancellationRating
7.7
1,437 reviews
Search KLM flights
United AirlinesPriceFrom $644Free CancellationRating
7.4
9,144 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
Esposende
Lamego
Guimarães
Chaves
Espinho
Viseu
Pinhao
Arcos de Valdevez
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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