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Cheap flights from Portland to Porto from $325

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 10/5. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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 - 9:30 am
PDX
-
OPO
15h 30m
1 stop
Multiple Airlines Logo
6:00 am - 8:46 pm
OPO
-
PDX
22h 46m
2 stops
$731Multiple Airlines
Sun, Nov 15 - Thu, Dec 10
Delta Logo
7:00 am - 9:05 am
PDX
-
OPO
18h 05m
1 stop
Delta Logo
11:15 am - 11:20 am
OPO
-
PDX
32h 05m
1 stop
$733Delta
Sun, Nov 15 - Thu, Dec 10
Multiple Airlines Logo
5:00 am - 9:30 am
PDX
-
OPO
20h 30m
2 stops
Multiple Airlines Logo
6:00 am - 6:31 pm
OPO
-
PDX
20h 31m
2 stops
$735Multiple Airlines
Sun, Nov 15 - Thu, Dec 10
Delta Logo
1:20 pm - 10:30 pm
PDX
-
OPO
25h 10m
1 stop
Delta Logo
11:15 am - 11:20 am
OPO
-
PDX
32h 05m
1 stop
$736Delta
Mon, Nov 16 - Thu, Dec 10
Delta Logo
9:45 pm - 9:05 am
PDX
-
OPO
27h 20m
2 stops
Delta Logo
11:15 am - 11:20 am
OPO
-
PDX
32h 05m
1 stop
$737Delta
Sat, Nov 14 - Thu, Dec 10
Delta Logo
11:40 am - 3:25 pm
PDX
-
OPO
19h 45m
2 stops
Delta Logo
5:00 am - 11:20 am
OPO
-
PDX
14h 20m
1 stop
$741Delta
Mon, Nov 2 - Wed, Nov 11
Delta Logo
7:00 am - 9:05 am
PDX
-
OPO
18h 05m
1 stop
Delta Logo
5:00 am - 4:27 pm
OPO
-
PDX
19h 27m
2 stops
$742Delta
Sun, Nov 15 - Wed, Dec 9
Delta Logo
10:05 pm - 9:05 am
PDX
-
OPO
27h 00m
1 stop
Delta Logo
11:15 am - 11:20 am
OPO
-
PDX
32h 05m
1 stop
$744Delta
Sat, Nov 14 - Thu, Dec 10
United Airlines Logo
5:00 am - 9:30 am
PDX
-
OPO
20h 30m
2 stops
United Airlines Logo
12:35 pm - 12:54 am
OPO
-
PDX
20h 19m
2 stops
$745United Airlines
Sun, Nov 15 - Fri, Dec 11
Delta Logo
6:15 am - 10:35 am
PDX
-
OPO
20h 20m
2 stops
Delta Logo
5:00 am - 4:27 pm
OPO
-
PDX
19h 27m
2 stops
$746Delta
Mon, Nov 16 - Fri, Dec 11

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Delta flights from Portland to Porto

Our best Delta deals on Portland to Porto flight tickets
Delta
Nov 15
PDX7:00 amPortland
18h 05m
1 stop
OPO9:05 amPorto
Dec 10
OPO11:15 amPorto
32h 05m
1 stop
PDX11:20 amPortland
$733
Delta
Nov 16
PDX1:20 pmPortland
25h 10m
1 stop
OPO10:30 pmPorto
Dec 10
OPO11:15 amPorto
32h 05m
1 stop
PDX11:20 amPortland
$736
Delta
Nov 14
PDX9:45 pmPortland
27h 20m
2 stops
OPO9:05 amPorto
Dec 10
OPO11:15 amPorto
32h 05m
1 stop
PDX11:20 amPortland
$737

United Airlines flights from Portland to Porto

Our best United Airlines deals on Portland to Porto flight tickets
United Airlines
Nov 15
PDX5:00 amPortland
20h 30m
2 stops
OPO9:30 amPorto
Dec 11
OPO12:35 pmPorto
20h 19m
2 stops
PDX12:54 amPortland
$745
United Airlines
Nov 16
PDX10:00 amPortland
15h 30m
1 stop
OPO9:30 amPorto
Dec 15
OPO12:35 pmPorto
16h 46m
1 stop
PDX9:21 pmPortland
$750
United Airlines
Oct 31
PDX11:00 pmPortland
27h 30m
1 stop
OPO9:30 amPorto
Nov 10
OPO12:35 pmPorto
28h 46m
1 stop
PDX9:21 amPortland
$762

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 July 7, 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

Sun 11/15

10:00 am-9:30 am

1 stop15h 30m

Porto

Thu 12/10

6:00 am-8:46 pm

2 stops22h 46m

$731

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 11/15

7:00 am-9:05 am

1 stop18h 05m

Porto

Thu 12/10

11:15 am-11:20 am

1 stop32h 05m

$733

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 11/15

5:00 am-9:30 am

2 stops20h 30m

Porto

Thu 12/10

6:00 am-6:31 pm

2 stops20h 31m

$735

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 11/16

1:20 pm-10:30 pm

1 stop25h 10m

Porto

Thu 12/10

11:15 am-11:20 am

1 stop32h 05m

$736

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 11/14

9:45 pm-9:05 am

2 stops27h 20m

Porto

Thu 12/10

11:15 am-11:20 am

1 stop32h 05m

$737
Quickest round-trip

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 11/2

11:40 am-3:25 pm

2 stops19h 45m

Porto

Wed 11/11

5:00 am-11:20 am

1 stop14h 20m

$741

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 11/15

7:00 am-9:05 am

1 stop18h 05m

Porto

Wed 12/9

5:00 am-4:27 pm

2 stops19h 27m

$742

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 11/14

10:05 pm-9:05 am

1 stop27h 00m

Porto

Thu 12/10

11:15 am-11:20 am

1 stop32h 05m

$744

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 11/15

5:00 am-9:30 am

2 stops20h 30m

Porto

Fri 12/11

12:35 pm-12:54 am

2 stops20h 19m

$745

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 11/16

6:15 am-10:35 am

2 stops20h 20m

Porto

Fri 12/11

5:00 am-4:27 pm

2 stops19h 27m

$746

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.

Can stopping save me money on Portland to Porto flights?

You could potentially save up to 22% 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 49m

Direct flights

None
The fastest flight from Portland to Porto takes 14h 49m
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 14h 49m, 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
7.8
8,452 reviews
Search Delta flights
KLMPriceFrom $498Free CancellationRating
7.8
1,534 reviews
Search KLM flights
United AirlinesPriceFrom $502Free CancellationRating
7.4
9,945 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
Chaves
Pinhao
Arcos de Valdevez
Guimarães
Espinho
Ponte de Lima
Viseu
Curia
Mesao Frio
Penafiel
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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