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Cheap flights from Portland to Porto from $297

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 8/30. 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.
Delta Logo
10:05 pm - 10:35 am
PDX
-
OPO
28h 30m
2 stops
Delta Logo
5:00 am - 11:20 am
OPO
-
PDX
14h 20m
1 stop
$741Delta
Sat, Jan 16 - Fri, Feb 12
Delta Logo
1:20 pm - 3:25 pm
PDX
-
OPO
18h 05m
1 stop
Delta Logo
5:00 am - 11:20 am
OPO
-
PDX
14h 20m
1 stop
$741Delta
Mon, Jan 18 - Fri, Feb 12
Delta Logo
1:20 pm - 10:30 am
PDX
-
OPO
13h 10m
1 stop
Delta Logo
5:00 am - 11:20 am
OPO
-
PDX
14h 20m
1 stop
$741Delta
Sun, Jan 17 - Fri, Feb 12
Multiple Airlines Logo
7:00 am - 10:35 am
PDX
-
OPO
19h 35m
2 stops
Multiple Airlines Logo
5:00 am - 4:34 pm
OPO
-
PDX
19h 34m
2 stops
$751Multiple Airlines
Wed, Jan 20 - Tue, Feb 9
SWISS Logo
8:46 am - 11:15 am
PDX
-
OPO
42h 29m
2 stops
SWISS Logo
12:05 pm - 11:12 pm
OPO
-
PDX
43h 07m
2 stops
$762SWISS
Sun, Jan 17 - Mon, Feb 8
Lufthansa Logo
8:45 am - 12:50 pm
PDX
-
OPO
20h 05m
2 stops
Lufthansa Logo
1:45 pm - 11:12 pm
OPO
-
PDX
41h 27m
2 stops
$770Lufthansa
Mon, Jan 18 - Mon, Feb 8
KLM Logo
1:20 pm - 3:25 pm
PDX
-
OPO
18h 05m
1 stop
KLM Logo
5:00 am - 11:20 am
OPO
-
PDX
14h 20m
1 stop
$791KLM
Mon, Jan 18 - Mon, Feb 8
United Airlines Logo
7:00 am - 9:30 am
PDX
-
OPO
18h 30m
2 stops
United Airlines Logo
12:35 pm - 6:31 pm
OPO
-
PDX
37h 56m
2 stops
$801United Airlines
Wed, Nov 25 - Mon, Nov 30
United Airlines Logo
7:00 am - 9:30 am
PDX
-
OPO
18h 30m
2 stops
United Airlines Logo
12:35 pm - 6:31 pm
OPO
-
PDX
37h 56m
2 stops
$801United Airlines
Wed, Nov 25 - Mon, Nov 30
KLM Logo
1:20 pm - 3:25 pm
PDX
-
OPO
18h 05m
1 stop
KLM Logo
5:00 am - 11:20 am
OPO
-
PDX
14h 20m
1 stop
$831KLM
Wed, Nov 25 - Mon, Nov 30

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Delta flights from Portland to Porto

Our best Delta deals on Portland to Porto flight tickets
Delta
Jan 17
PDX10:05 pmPortland
28h 30m
2 stops
OPO10:35 amPorto
Feb 11
OPO11:15 amPorto
32h 05m
1 stop
PDX11:20 amPortland
$741
Delta
Jan 17
PDX1:20 pmPortland
18h 05m
1 stop
OPO3:25 pmPorto
Feb 9
OPO5:00 amPorto
23h 23m
2 stops
PDX8:23 pmPortland
$751
Delta
Jan 21
PDX11:10 amPortland
20h 15m
2 stops
OPO3:25 pmPorto
Feb 8
OPO11:15 amPorto
37h 19m
2 stops
PDX4:34 pmPortland
$805

SWISS flights from Portland to Porto

Our best SWISS deals on Portland to Porto flight tickets
SWISS
Jan 17
PDX8:46 amPortland
42h 29m
2 stops
OPO11:15 amPorto
Feb 8
OPO12:05 pmPorto
43h 07m
2 stops
PDX11:12 pmPortland
$762
SWISS
Jan 17
PDX8:46 amPortland
42h 29m
2 stops
OPO11:15 amPorto
Feb 6
OPO12:05 pmPorto
43h 07m
2 stops
PDX11:12 pmPortland
$812
SWISS
Nov 25
PDX7:00 amPortland
20h 15m
2 stops
OPO11:15 amPorto
Nov 30
OPO7:20 pmPorto
33h 13m
2 stops
PDX8:33 pmPortland
$836

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 29, 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

Sat 1/16

10:05 pm-10:35 am

2 stops28h 30m

Porto

Fri 2/12

5:00 am-11:20 am

1 stop14h 20m

$741

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 1/18

1:20 pm-3:25 pm

1 stop18h 05m

Porto

Fri 2/12

5:00 am-11:20 am

1 stop14h 20m

$741
Quickest round-trip

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 1/17

1:20 pm-10:30 am

1 stop13h 10m

Porto

Fri 2/12

5:00 am-11:20 am

1 stop14h 20m

$741

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 1/20

7:00 am-10:35 am

2 stops19h 35m

Porto

Tue 2/9

5:00 am-4:34 pm

2 stops19h 34m

$751

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 1/17

8:46 am-11:15 am

2 stops42h 29m

Porto

Mon 2/8

12:05 pm-11:12 pm

2 stops43h 07m

$762

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 1/18

8:45 am-12:50 pm

2 stops20h 05m

Porto

Mon 2/8

1:45 pm-11:12 pm

2 stops41h 27m

$770

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 1/18

1:20 pm-3:25 pm

1 stop18h 05m

Porto

Mon 2/8

5:00 am-11:20 am

1 stop14h 20m

$791

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 11/25

7:00 am-9:30 am

2 stops18h 30m

Porto

Mon 11/30

12:35 pm-6:31 pm

2 stops37h 56m

$801

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 11/25

7:00 am-9:30 am

2 stops18h 30m

Porto

Mon 11/30

12:35 pm-6:31 pm

2 stops37h 56m

$801

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 11/25

1:20 pm-3:25 pm

1 stop18h 05m

Porto

Mon 11/30

5:00 am-11:20 am

1 stop14h 20m

$831

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?

Prices are currently low for flights on this route.

Typical prices usually range from $920 to $1,179.
The lowest price recently found on this route was $741.

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 $901 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 $772 on momondo.

Can stopping save me money on Portland to Porto flights?

You could potentially save up to 5% 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

13h 35m

Direct flights

None
The fastest flight from Portland to Porto takes 13h 35m
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 13h 35m, 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
8,487 reviews
Search Delta flights
KLMPriceFrom $498Free CancellationRating
7.8
1,551 reviews
Search KLM flights
United AirlinesPriceFrom $502Free CancellationRating
7.4
10,051 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
Pinhao
Esposende
Lamego
Chaves
Arcos de Valdevez
Guimarães
Viseu
Espinho
Ponte de Lima
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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