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Cheap flights from Portland to Porto from $608

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.
1 adult
0 bags

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Find the cheapest flights from Portland to Porto

Cheap round-trip flights

Iberia Logo
7:59 am - 8:00 pmPDX-OPO
28h 01m2 stops
Iberia Logo
8:40 pm - 12:20 pmOPO-PDX
23h 40m2 stops
$608Iberia
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Sun, Jan 11 - Wed, Jan 28
United Airlines Logo
6:00 am - 9:30 amPDX-OPO
19h 30m3 stops
United Airlines Logo
6:00 am - 10:56 pmOPO-PDX
24h 56m2 stops
$644United Airlines
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Wed, Nov 12 - Sun, Nov 16
United Airlines Logo
6:00 am - 9:30 amPDX-OPO
19h 30m3 stops
United Airlines Logo
12:35 pm - 10:53 amOPO-PDX
30h 18m3 stops
$647United Airlines
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Wed, Nov 12 - Sun, Nov 16
American Airlines Logo
5:45 pm - 8:00 pmPDX-OPO
18h 15m2 stops
American Airlines Logo
8:20 am - 10:26 pmOPO-PDX
22h 06m2 stops
$657American Airlines
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Fri, Nov 28 - Fri, Dec 12
United Airlines Logo
5:00 am - 9:30 amPDX-OPO
20h 30m2 stops
United Airlines Logo
12:35 pm - 10:53 amOPO-PDX
30h 18m3 stops
$667United Airlines
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Wed, Nov 12 - Sun, Nov 16
Delta Logo
7:05 am - 10:30 amPDX-OPO
19h 25m2 stops
Delta Logo
11:15 am - 11:25 amOPO-PDX
32h 10m1 stop
$680Delta
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Wed, Nov 12 - Sun, Nov 16
KLM Logo
1:25 pm - 7:20 pmPDX-OPO
21h 55m1 stop
KLM Logo
4:10 pm - 11:25 amOPO-PDX
27h 15m1 stop
$701KLM
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Wed, Nov 12 - Sun, Nov 16
Delta Logo
1:25 pm - 10:30 amPDX-OPO
13h 05m1 stop
Delta Logo
11:15 am - 11:25 amOPO-PDX
32h 10m1 stop
$702Delta
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Wed, Nov 12 - Sun, Nov 16
KLM Logo
1:25 pm - 7:15 pmPDX-OPO
21h 50m1 stop
KLM Logo
6:30 am - 8:25 pmOPO-PDX
21h 55m2 stops
$711KLM
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Fri, Nov 28 - Fri, Dec 12
Lufthansa Logo
12:53 pm - 3:45 pmPDX-OPO
18h 52m2 stops
Lufthansa Logo
12:30 pm - 12:43 amOPO-PDX
20h 13m2 stops
$712Lufthansa
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Tue, Sep 30 - Fri, Jan 30

Delta flights from Portland to Porto

Our best Delta deals on Portland to Porto flight tickets
Delta
Nov 12
PDX7:05 amPortland
19h 25m
2 stops
OPO10:30 amPorto
Nov 16
OPO11:15 amPorto
32h 10m
1 stop
PDX11:25 amPortland
$680
Find similar
Delta
Nov 12
PDX1:25 pmPortland
13h 05m
1 stop
OPO10:30 amPorto
Nov 16
OPO11:15 amPorto
32h 10m
1 stop
PDX11:25 amPortland
$702
Find similar
Delta
Nov 11
PDX12:35 amPortland
25h 55m
2 stops
OPO10:30 amPorto
Nov 16
OPO11:15 amPorto
32h 10m
1 stop
PDX11:25 amPortland
$706
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United Airlines flights from Portland to Porto

Our best United Airlines deals on Portland to Porto flight tickets
United Airlines
Nov 12
PDX6:00 amPortland
19h 30m
3 stops
OPO9:30 amPorto
Nov 16
OPO6:00 amPorto
24h 56m
2 stops
PDX10:56 pmPortland
$644
Find similar
United Airlines
Nov 12
PDX6:00 amPortland
19h 30m
3 stops
OPO9:30 amPorto
Nov 16
OPO12:35 pmPorto
30h 18m
3 stops
PDX10:53 amPortland
$647
Find similar
United Airlines
Nov 12
PDX5:00 amPortland
20h 30m
2 stops
OPO9:30 amPorto
Nov 16
OPO12:35 pmPorto
30h 18m
3 stops
PDX10:53 amPortland
$667
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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 August 26, 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

7:59 am-8:00 pm

2 stops28h 01m

Porto

Wed 1/28

8:40 pm-12:20 pm

2 stops23h 40m

$608

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 11/12

6:00 am-9:30 am

3 stops19h 30m

Porto

Sun 11/16

6:00 am-10:56 pm

2 stops24h 56m

$644

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 11/12

6:00 am-9:30 am

3 stops19h 30m

Porto

Sun 11/16

12:35 pm-10:53 am

3 stops30h 18m

$647

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 11/28

5:45 pm-8:00 pm

2 stops18h 15m

Porto

Fri 12/12

8:20 am-10:26 pm

2 stops22h 06m

$657

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 11/12

5:00 am-9:30 am

2 stops20h 30m

Porto

Sun 11/16

12:35 pm-10:53 am

3 stops30h 18m

$667

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 11/12

7:05 am-10:30 am

2 stops19h 25m

Porto

Sun 11/16

11:15 am-11:25 am

1 stop32h 10m

$680

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 11/12

1:25 pm-7:20 pm

1 stop21h 55m

Porto

Sun 11/16

4:10 pm-11:25 am

1 stop27h 15m

$701

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 11/12

1:25 pm-10:30 am

1 stop13h 05m

Porto

Sun 11/16

11:15 am-11:25 am

1 stop32h 10m

$702

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 11/28

1:25 pm-7:15 pm

1 stop21h 50m

Porto

Fri 12/12

6:30 am-8:25 pm

2 stops21h 55m

$711

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 9/30

12:53 pm-3:45 pm

2 stops18h 52m

Porto

Fri 1/30

12:30 pm-12:43 am

2 stops20h 13m

$712

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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 November is, on average, the cheapest month to fly to Porto from Portland, with most prices found around $775. If you aren’t able to travel during the month of November, then book flights to Porto from Portland during February instead. Flights to Porto in February, while not as cheap as those in November, still average around $778.

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 $1,041 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 33% 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.
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  • 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
8,943 reviews
Search United Airlines flights
DeltaPriceFrom $709Free CancellationRating
7.9
7,979 reviews
Search Delta flights
KLMPriceFrom $739Free CancellationRating
7.8
1,387 reviews
Search KLM flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Aveiro
Coimbra
Braga
Matosinhos
Caminha
Guimarães
Lamego
Esposende
Chaves
Arcos de Valdevez
Espinho
Viseu
Ponte de Lima
Pinhao
Santa Maria da Feira
Curia
Penafiel
Mesao Frio
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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