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Cheap flights from Portland to Porto from $349

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 1/20. 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.
Delta Logo
7:10 am - 10:30 amPDX-OPO
43h 20m2 stops
Delta Logo
11:15 am - 12:25 pmOPO-PDX
32h 10m1 stop
$465Delta
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Sun, Mar 1 - Thu, Mar 12
Delta Logo
6:00 am - 10:30 amPDX-OPO
20h 30m2 stops
Delta Logo
11:15 am - 12:25 pmOPO-PDX
32h 10m1 stop
$468Delta
Find Deal
Mon, Mar 2 - Tue, Mar 10
Delta Logo
3:55 pm - 10:30 amPDX-OPO
58h 35m2 stops
Delta Logo
11:15 am - 12:25 pmOPO-PDX
32h 10m1 stop
$471Delta
Find Deal
Sat, Feb 28 - Thu, Mar 12
KLM Logo
1:25 pm - 6:50 pmPDX-OPO
21h 25m1 stop
KLM Logo
4:10 pm - 12:25 pmOPO-PDX
27h 15m1 stop
$476KLM
Find Deal
Mon, Mar 2 - Thu, Mar 12
Delta Logo
1:25 pm - 10:25 pmPDX-OPO
25h 00m1 stop
Delta Logo
11:15 am - 12:25 pmOPO-PDX
32h 10m1 stop
$477Delta
Find Deal
Sun, Mar 1 - Thu, Mar 12
KLM Logo
7:00 am - 10:30 amPDX-OPO
19h 30m2 stops
KLM Logo
5:00 am - 12:25 pmOPO-PDX
14h 25m1 stop
$478KLM
Find Deal
Sun, Mar 1 - Wed, Mar 11
Delta Logo
6:00 am - 10:30 amPDX-OPO
20h 30m2 stops
Delta Logo
11:15 am - 9:11 pmOPO-PDX
40h 56m2 stops
$479Delta
Find Deal
Mon, Mar 2 - Tue, Mar 10
Delta Logo
1:27 pm - 3:25 pmPDX-OPO
17h 58m2 stops
Delta Logo
11:15 am - 12:25 pmOPO-PDX
32h 10m1 stop
$480Delta
Find Deal
Fri, Feb 27 - Tue, Mar 10
Delta Logo
6:56 am - 3:25 pmPDX-OPO
24h 29m2 stops
Delta Logo
11:15 am - 12:25 pmOPO-PDX
32h 10m1 stop
$481Delta
Find Deal
Tue, Mar 3 - Thu, Mar 12
KLM Logo
1:25 pm - 10:25 pmPDX-OPO
25h 00m1 stop
KLM Logo
5:00 am - 6:58 pmOPO-PDX
20h 58m2 stops
$482KLM
Find Deal
Mon, Mar 2 - Fri, Mar 13

Lufthansa flights from Portland to Porto

Our best Lufthansa deals on Portland to Porto flight tickets
Lufthansa
Mar 2
PDX7:30 amPortland
21h 20m
2 stops
OPO12:50 pmPorto
Mar 12
OPO6:00 amPorto
25h 44m
2 stops
PDX12:44 amPortland
$516
Find similar
Lufthansa
Dec 9
PDX10:10 amPortland
18h 40m
2 stops
OPO12:50 pmPorto
Jan 11
OPO1:45 pmPorto
42h 54m
2 stops
PDX12:39 amPortland
$1,011
Find similar
Lufthansa
Dec 10
PDX8:30 amPortland
20h 45m
2 stops
OPO1:15 pmPorto
Dec 19
OPO6:00 amPorto
24h 40m
2 stops
PDX10:40 pmPortland
$1,258
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Air Europa flights from Portland to Porto

Our best Air Europa deals on Portland to Porto flight tickets
Air Europa
Nov 28
PDX7:05 amPortland
24h 10m
2 stops
OPO3:15 pmPorto
Dec 12
OPO11:35 amPorto
41h 05m
2 stops
PDX8:40 pmPortland
$1,073
Find similar
Air Europa
Nov 28
PDX7:05 amPortland
24h 10m
2 stops
OPO3:15 pmPorto
Dec 12
OPO11:35 amPorto
41h 05m
2 stops
PDX8:40 pmPortland
$1,085
Find similar
Air Europa
Nov 28
PDX7:05 amPortland
24h 10m
2 stops
OPO3:15 pmPorto
Dec 12
OPO11:35 amPorto
41h 05m
2 stops
PDX8:40 pmPortland
$1,086
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 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 3/1

7:10 am-10:30 am

2 stops43h 20m

Porto

Thu 3/12

11:15 am-12:25 pm

1 stop32h 10m

$465

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 3/2

6:00 am-10:30 am

2 stops20h 30m

Porto

Tue 3/10

11:15 am-12:25 pm

1 stop32h 10m

$468

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 2/28

3:55 pm-10:30 am

2 stops58h 35m

Porto

Thu 3/12

11:15 am-12:25 pm

1 stop32h 10m

$471

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 3/2

1:25 pm-6:50 pm

1 stop21h 25m

Porto

Thu 3/12

4:10 pm-12:25 pm

1 stop27h 15m

$476

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 3/1

1:25 pm-10:25 pm

1 stop25h 00m

Porto

Thu 3/12

11:15 am-12:25 pm

1 stop32h 10m

$477

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 3/1

7:00 am-10:30 am

2 stops19h 30m

Porto

Wed 3/11

5:00 am-12:25 pm

1 stop14h 25m

$478

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 3/2

6:00 am-10:30 am

2 stops20h 30m

Porto

Tue 3/10

11:15 am-9:11 pm

2 stops40h 56m

$479

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 2/27

1:27 pm-3:25 pm

2 stops17h 58m

Porto

Tue 3/10

11:15 am-12:25 pm

1 stop32h 10m

$480

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 3/3

6:56 am-3:25 pm

2 stops24h 29m

Porto

Thu 3/12

11:15 am-12:25 pm

1 stop32h 10m

$481

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 3/2

1:25 pm-10:25 pm

1 stop25h 00m

Porto

Fri 3/13

5:00 am-6:58 pm

2 stops20h 58m

$482

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 $1,001 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 31% 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 50m

Direct flights

None
The fastest flight from Portland to Porto takes 16h 50m
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
KLMPriceFrom $498Free CancellationRating
7.7
1,423 reviews
Search KLM flights
DeltaPriceFrom $591Free CancellationRating
7.9
7,998 reviews
Search Delta flights
United AirlinesPriceFrom $647Free CancellationRating
7.4
9,046 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
Aveiro
Braga
Matosinhos
Guimarães
Lamego
Esposende
Chaves
Viseu
Espinho
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.

An easier way to manage your Porto trip

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