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Cheap flights from Portland to Porto from $301

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 4/14. 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
3:15 pm - 11:25 pm
PDX
-
OPO
24h 10m
2 stops
Multiple Airlines Logo
8:40 am - 10:29 pm
OPO
-
PDX
21h 49m
2 stops
$493Multiple Airlines
Tue, Apr 7 - Tue, Apr 14
Lufthansa Logo
7:15 am - 11:25 pm
PDX
-
OPO
32h 10m
2 stops
Lufthansa Logo
6:20 am - 9:14 pm
OPO
-
PDX
22h 54m
2 stops
$528Lufthansa
Tue, Apr 7 - Tue, Apr 21
Iberia Logo
1:52 pm - 8:00 pm
PDX
-
OPO
22h 08m
2 stops
Iberia Logo
8:20 am - 11:54 pm
OPO
-
PDX
23h 34m
2 stops
$550Iberia
Thu, Apr 16 - Thu, Apr 30
Multiple Airlines Logo
2:10 pm - 10:45 pm
PDX
-
OPO
24h 35m
2 stops
Multiple Airlines Logo
8:40 am - 8:58 pm
OPO
-
PDX
20h 18m
2 stops
$610Multiple Airlines
Fri, Apr 24 - Sat, May 9
American Airlines Logo
6:22 am - 11:45 am
PDX
-
OPO
21h 23m
2 stops
American Airlines Logo
12:25 pm - 11:54 pm
OPO
-
PDX
19h 29m
2 stops
$625American Airlines
Sun, Apr 12 - Fri, Apr 24
British Airways Logo
7:30 pm - 7:30 pm
PDX
-
OPO
16h 00m
1 stop
British Airways Logo
8:20 am - 10:42 pm
OPO
-
PDX
22h 22m
2 stops
$628British Airways
Tue, Apr 7 - Tue, Apr 14
Iberia Logo
10:35 am - 4:00 pm
PDX
-
OPO
21h 25m
2 stops
Iberia Logo
8:20 am - 11:54 pm
OPO
-
PDX
23h 34m
2 stops
$650Iberia
Thu, Apr 16 - Thu, Apr 30
Iberia Logo
10:35 am - 4:00 pm
PDX
-
OPO
21h 25m
2 stops
Iberia Logo
8:20 am - 11:54 pm
OPO
-
PDX
23h 34m
2 stops
$651Iberia
Thu, Apr 16 - Thu, Apr 30
United Airlines Logo
11:59 pm - 11:40 am
PDX
-
OPO
28h 41m
2 stops
United Airlines Logo
6:00 am - 6:34 pm
OPO
-
PDX
44h 34m
2 stops
$653United Airlines
Tue, Mar 17 - Tue, Mar 31
KLM Logo
1:05 pm - 3:30 pm
PDX
-
OPO
18h 25m
1 stop
KLM Logo
4:20 pm - 11:10 am
OPO
-
PDX
26h 50m
1 stop
$669KLM
Tue, Apr 7 - Tue, Apr 14

Iberia flights from Portland to Porto

Our best Iberia deals on Portland to Porto flight tickets
Iberia
Apr 16
PDX1:52 pmPortland
22h 08m
2 stops
OPO8:00 pmPorto
Apr 30
OPO8:20 amPorto
23h 34m
2 stops
PDX11:54 pmPortland
$550
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 16
PDX10:35 amPortland
21h 25m
2 stops
OPO4:00 pmPorto
Apr 30
OPO8:20 amPorto
23h 34m
2 stops
PDX11:54 pmPortland
$651

United Airlines flights from Portland to Porto

Our best United Airlines deals on Portland to Porto flight tickets
United Airlines
Mar 17
PDX11:59 pmPortland
28h 41m
2 stops
OPO11:40 amPorto
Mar 31
OPO6:00 amPorto
44h 34m
2 stops
PDX6:34 pmPortland
$653
United Airlines
Feb 26
PDX5:05 amPortland
20h 25m
2 stops
OPO9:30 amPorto
Mar 2
OPO6:00 amPorto
20h 49m
2 stops
PDX6:49 pmPortland
$692
United Airlines
Feb 26
PDX11:59 pmPortland
25h 31m
2 stops
OPO9:30 amPorto
Mar 2
OPO12:35 pmPorto
32h 03m
3 stops
PDX12:38 pmPortland
$701

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 13, 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

Tue 4/7

3:15 pm-11:25 pm

2 stops24h 10m

Porto

Tue 4/14

8:40 am-10:29 pm

2 stops21h 49m

$493

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/7

7:15 am-11:25 pm

2 stops32h 10m

Porto

Tue 4/21

6:20 am-9:14 pm

2 stops22h 54m

$528

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 4/16

1:52 pm-8:00 pm

2 stops22h 08m

Porto

Thu 4/30

8:20 am-11:54 pm

2 stops23h 34m

$550

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 4/24

2:10 pm-10:45 pm

2 stops24h 35m

Porto

Sat 5/9

8:40 am-8:58 pm

2 stops20h 18m

$610

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 4/12

6:22 am-11:45 am

2 stops21h 23m

Porto

Fri 4/24

12:25 pm-11:54 pm

2 stops19h 29m

$625

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/7

7:30 pm-7:30 pm

1 stop16h 00m

Porto

Tue 4/14

8:20 am-10:42 pm

2 stops22h 22m

$628

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 4/16

10:35 am-4:00 pm

2 stops21h 25m

Porto

Thu 4/30

8:20 am-11:54 pm

2 stops23h 34m

$650

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 4/16

10:35 am-4:00 pm

2 stops21h 25m

Porto

Thu 4/30

8:20 am-11:54 pm

2 stops23h 34m

$651

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 3/17

11:59 pm-11:40 am

2 stops28h 41m

Porto

Tue 3/31

6:00 am-6:34 pm

2 stops44h 34m

$653

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/7

1:05 pm-3:30 pm

1 stop18h 25m

Porto

Tue 4/14

4:20 pm-11:10 am

1 stop26h 50m

$669

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 14% 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 45m

Direct flights

None
The fastest flight from Portland to Porto takes 17h 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 17h 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
8,203 reviews
Search Delta flights
KLMPriceFrom $498Free CancellationRating
7.7
1,454 reviews
Search KLM flights
United AirlinesPriceFrom $537Free CancellationRating
7.4
9,289 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
Matosinhos
Braga
Aveiro
Esposende
Lamego
Guimarães
Pinhao
Chaves
Espinho
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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