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Cheap flights from Portland to Porto from $312

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 10/7. 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
7:00 am - 9:05 am
PDX
-
OPO
18h 05m
1 stop
Multiple Airlines Logo
5:00 am - 11:20 am
OPO
-
PDX
14h 20m
1 stop
$733Multiple Airlines
Sun, Nov 1 - Wed, Nov 11
Delta Logo
1:20 pm - 10:30 pm
PDX
-
OPO
25h 10m
1 stop
Delta Logo
5:00 am - 11:20 am
OPO
-
PDX
14h 20m
1 stop
$737Delta
Mon, Nov 2 - Wed, Nov 11
Multiple Airlines Logo
7:35 pm - 9:30 am
PDX
-
OPO
29h 55m
2 stops
Multiple Airlines Logo
6:00 am - 2:41 pm
OPO
-
PDX
16h 41m
2 stops
$741Multiple Airlines
Sat, Nov 14 - Wed, Nov 18
Multiple Airlines Logo
11:00 pm - 9:30 am
PDX
-
OPO
26h 30m
1 stop
Multiple Airlines Logo
6:00 am - 6:31 pm
OPO
-
PDX
20h 31m
2 stops
$742Multiple Airlines
Sat, Nov 14 - Wed, Nov 18
United Airlines Logo
5:00 am - 7:00 am
PDX
-
OPO
18h 00m
2 stops
United Airlines Logo
6:00 am - 12:35 am
OPO
-
PDX
26h 35m
3 stops
$744United Airlines
Wed, Oct 14 - Wed, Nov 4
United Airlines Logo
7:07 pm - 9:30 am
PDX
-
OPO
30h 23m
2 stops
United Airlines Logo
6:00 am - 11:12 pm
OPO
-
PDX
25h 12m
2 stops
$745United Airlines
Sun, Nov 1 - Wed, Nov 11
Delta Logo
1:05 pm - 6:20 pm
PDX
-
OPO
21h 15m
1 stop
Delta Logo
5:00 am - 5:04 pm
OPO
-
PDX
20h 04m
2 stops
$746Delta
Wed, Oct 14 - Wed, Nov 4
Delta Logo
10:50 pm - 9:05 am
PDX
-
OPO
27h 15m
2 stops
Delta Logo
5:00 am - 11:47 pm
OPO
-
PDX
26h 47m
2 stops
$747Delta
Sat, Oct 31 - Wed, Nov 11
United Airlines Logo
2:30 pm - 9:30 am
PDX
-
OPO
35h 00m
2 stops
United Airlines Logo
12:35 pm - 7:07 pm
OPO
-
PDX
38h 32m
2 stops
$751United Airlines
Sat, Nov 14 - Wed, Nov 18
United Airlines Logo
11:00 pm - 9:30 am
PDX
-
OPO
26h 30m
1 stop
United Airlines Logo
12:35 pm - 11:53 am
OPO
-
PDX
31h 18m
2 stops
$752United Airlines
Sat, Nov 14 - Wed, Nov 18

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United Airlines flights from Portland to Porto

Our best United Airlines deals on Portland to Porto flight tickets
United Airlines
Oct 14
PDX5:00 amPortland
18h 00m
2 stops
OPO7:00 amPorto
Nov 4
OPO6:00 amPorto
26h 35m
3 stops
PDX12:35 amPortland
$744
United Airlines
Nov 1
PDX7:07 pmPortland
30h 23m
2 stops
OPO9:30 amPorto
Nov 11
OPO6:00 amPorto
25h 12m
2 stops
PDX11:12 pmPortland
$745
United Airlines
Nov 14
PDX2:30 pmPortland
35h 00m
2 stops
OPO9:30 amPorto
Nov 18
OPO12:35 pmPorto
38h 32m
2 stops
PDX7:07 pmPortland
$751

Air Canada flights from Portland to Porto

Our best Air Canada deals on Portland to Porto flight tickets
Air Canada
Oct 6
PDX3:30 pmPortland
31h 30m
2 stops
OPO7:00 amPorto
Oct 14
OPO11:20 amPorto
43h 03m
2 stops
PDX10:23 pmPortland
$789
Air Canada
Oct 6
PDX7:45 pmPortland
27h 15m
2 stops
OPO7:00 amPorto
Oct 16
OPO6:00 amPorto
40h 51m
2 stops
PDX2:51 pmPortland
$790
Air Canada
Oct 7
PDX7:02 amPortland
15h 58m
2 stops
OPO7:00 amPorto
Oct 20
OPO11:15 amPorto
41h 45m
2 stops
PDX9:00 pmPortland
$793

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 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

Cheapest round-trip
Quickest round-trip

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 11/1

7:00 am-9:05 am

1 stop18h 05m

Porto

Wed 11/11

5:00 am-11:20 am

1 stop14h 20m

$733

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 11/2

1:20 pm-10:30 pm

1 stop25h 10m

Porto

Wed 11/11

5:00 am-11:20 am

1 stop14h 20m

$737

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 11/14

7:35 pm-9:30 am

2 stops29h 55m

Porto

Wed 11/18

6:00 am-2:41 pm

2 stops16h 41m

$741

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 11/14

11:00 pm-9:30 am

1 stop26h 30m

Porto

Wed 11/18

6:00 am-6:31 pm

2 stops20h 31m

$742

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 10/14

5:00 am-7:00 am

2 stops18h 00m

Porto

Wed 11/4

6:00 am-12:35 am

3 stops26h 35m

$744

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 11/1

7:07 pm-9:30 am

2 stops30h 23m

Porto

Wed 11/11

6:00 am-11:12 pm

2 stops25h 12m

$745

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 10/14

1:05 pm-6:20 pm

1 stop21h 15m

Porto

Wed 11/4

5:00 am-5:04 pm

2 stops20h 04m

$746

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 10/31

10:50 pm-9:05 am

2 stops27h 15m

Porto

Wed 11/11

5:00 am-11:47 pm

2 stops26h 47m

$747

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 11/14

2:30 pm-9:30 am

2 stops35h 00m

Porto

Wed 11/18

12:35 pm-7:07 pm

2 stops38h 32m

$751

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 11/14

11:00 pm-9:30 am

1 stop26h 30m

Porto

Wed 11/18

12:35 pm-11:53 am

2 stops31h 18m

$752

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 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

16h 08m

Direct flights

None
The fastest flight from Portland to Porto takes 16h 08m
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 16h 08m, 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
8,465 reviews
Search Delta flights
KLMPriceFrom $498Free CancellationRating
7.8
1,537 reviews
Search KLM flights
United AirlinesPriceFrom $502Free CancellationRating
7.4
9,985 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
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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