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Cheap flights from Portland to Porto from $463

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Porto departing on 1/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
7:00 am - 12:05 pmPDX-OPO
21h 05m2 stops
Multiple Airlines Logo
12:30 pm - 12:39 amOPO-PDX
20h 09m2 stops
$463Multiple Airlines
Find Deal
Sun, Jan 11 - Sat, Jan 24
Delta Logo
7:00 am - 10:30 amPDX-OPO
19h 30m2 stops
Delta Logo
5:00 am - 11:25 amOPO-PDX
14h 25m1 stop
$482Delta
Find Deal
Wed, Jan 21 - Sun, Jan 25
Delta Logo
1:25 pm - 10:30 amPDX-OPO
13h 05m1 stop
Delta Logo
5:00 am - 11:25 amOPO-PDX
14h 25m1 stop
$483Delta
Find Deal
Wed, Jan 21 - Sun, Jan 25
Delta Logo
1:30 pm - 10:30 amPDX-OPO
61h 00m2 stops
Delta Logo
11:15 am - 11:25 amOPO-PDX
32h 10m1 stop
$485Delta
Find Deal
Sun, Jan 11 - Sat, Jan 24
Delta Logo
12:40 am - 10:25 pmPDX-OPO
37h 45m2 stops
Delta Logo
5:00 am - 11:25 amOPO-PDX
14h 25m1 stop
$488Delta
Find Deal
Tue, Jan 20 - Sun, Jan 25
Delta Logo
7:00 am - 10:30 amPDX-OPO
19h 30m2 stops
Delta Logo
11:15 am - 9:09 amOPO-PDX
53h 54m2 stops
$492Delta
Find Deal
Wed, Jan 21 - Sun, Jan 25
Delta Logo
12:40 am - 3:25 pmPDX-OPO
30h 45m2 stops
Delta Logo
11:15 am - 9:09 amOPO-PDX
53h 54m2 stops
$498Delta
Find Deal
Tue, Jan 20 - Sun, Jan 25
Delta Logo
1:25 pm - 10:25 pmPDX-OPO
25h 00m1 stop
Delta Logo
11:15 am - 11:25 amOPO-PDX
32h 10m1 stop
$576Delta
Find Deal
Sun, Jan 11 - Sat, Jan 24
Lufthansa Logo
9:50 am - 11:40 pmPDX-OPO
29h 50m2 stops
Lufthansa Logo
6:00 am - 12:44 amOPO-PDX
26h 44m2 stops
$623Lufthansa
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Fri, Feb 20 - Sun, Mar 1
KLM Logo
1:25 pm - 3:25 pmPDX-OPO
18h 00m1 stop
KLM Logo
4:10 pm - 11:25 amOPO-PDX
27h 15m1 stop
$633KLM
Find Deal
Fri, Feb 20 - Sun, Mar 1

United Airlines flights from Portland to Porto

Our best United Airlines deals on Portland to Porto flight tickets
United Airlines
Feb 20
PDX10:56 amPortland
38h 34m
3 stops
OPO9:30 amPorto
Mar 1
OPO6:00 amPorto
24h 59m
2 stops
PDX10:59 pmPortland
$649
Find similar
United Airlines
Mar 17
PDX7:30 amPortland
19h 00m
2 stops
OPO9:30 amPorto
Mar 31
OPO6:00 amPorto
37h 42m
2 stops
PDX11:42 amPortland
$695
Find similar
United Airlines
May 16
PDX5:15 amPortland
20h 30m
2 stops
OPO9:45 amPorto
May 24
OPO12:35 pmPorto
16h 46m
1 stop
PDX9:21 pmPortland
$1,158
Find similar

Delta flights from Portland to Porto

Our best Delta deals on Portland to Porto flight tickets
Delta
Jan 21
PDX7:00 amPortland
19h 30m
2 stops
OPO10:30 amPorto
Jan 25
OPO5:00 amPorto
14h 25m
1 stop
PDX11:25 amPortland
$482
Find similar
Delta
Jan 21
PDX1:25 pmPortland
13h 05m
1 stop
OPO10:30 amPorto
Jan 25
OPO5:00 amPorto
14h 25m
1 stop
PDX11:25 amPortland
$483
Find similar
Delta
Jan 11
PDX1:30 pmPortland
61h 00m
2 stops
OPO10:30 amPorto
Jan 24
OPO11:15 amPorto
32h 10m
1 stop
PDX11:25 amPortland
$485
Find similar

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 November 20, 2025.
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 1/11

7:00 am-12:05 pm

2 stops21h 05m

Porto

Sat 1/24

12:30 pm-12:39 am

2 stops20h 09m

$463

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 1/21

7:00 am-10:30 am

2 stops19h 30m

Porto

Sun 1/25

5:00 am-11:25 am

1 stop14h 25m

$482

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 1/21

1:25 pm-10:30 am

1 stop13h 05m

Porto

Sun 1/25

5:00 am-11:25 am

1 stop14h 25m

$483

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 1/11

1:30 pm-10:30 am

2 stops61h 00m

Porto

Sat 1/24

11:15 am-11:25 am

1 stop32h 10m

$485

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 1/20

12:40 am-10:25 pm

2 stops37h 45m

Porto

Sun 1/25

5:00 am-11:25 am

1 stop14h 25m

$488

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 1/21

7:00 am-10:30 am

2 stops19h 30m

Porto

Sun 1/25

11:15 am-9:09 am

2 stops53h 54m

$492

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 1/20

12:40 am-3:25 pm

2 stops30h 45m

Porto

Sun 1/25

11:15 am-9:09 am

2 stops53h 54m

$498

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 1/11

1:25 pm-10:25 pm

1 stop25h 00m

Porto

Sat 1/24

11:15 am-11:25 am

1 stop32h 10m

$576

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 2/20

9:50 am-11:40 pm

2 stops29h 50m

Porto

Sun 3/1

6:00 am-12:44 am

2 stops26h 44m

$623

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 2/20

1:25 pm-3:25 pm

1 stop18h 00m

Porto

Sun 3/1

4:10 pm-11:25 am

1 stop27h 15m

$633

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 December is, on average, the cheapest month to fly to Porto from Portland, with most prices found around $548. If you aren’t able to travel during the month of December, then book flights to Porto from Portland during November instead. Flights to Porto in November, while not as cheap as those in December, still average around $669.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Monday when prices can be found for as low as $1,088. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $1,428. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

At noon is the cheapest time of day to fly from Portland to Porto when you can find flight prices for as low as $1,088. Flying to Porto at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,278 on average. Flights to Porto from Portland in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $1,005 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 $709 on momondo.

Can stopping save me money on Portland to Porto flights?

You could potentially save up to 15% 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

Direct flights

None
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 13h 05m, 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
United AirlinesPriceFrom $647Free CancellationRating
7.4
9,021 reviews
Search United Airlines flights
KLMPriceFrom $647Free CancellationRating
7.7
1,412 reviews
Search KLM flights
DeltaPriceFrom $709Free CancellationRating
7.9
8,002 reviews
Search Delta 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
Aveiro
Matosinhos
Braga
Lamego
Guimarães
Esposende
Chaves
Espinho
Viseu
Ponte de Lima
Arcos de Valdevez
Pinhao
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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