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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 12/5. 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 - 10:30 amPDX-OPO
19h 30m2 stops
Multiple Airlines Logo
11:15 am - 11:25 amOPO-PDX
32h 10m1 stop
$481Multiple Airlines
Find Deal
lun., ene. 12 - mar., ene. 20
KLM Logo
1:25 pm - 10:30 amPDX-OPO
13h 05m1 stop
KLM Logo
11:15 am - 11:25 amOPO-PDX
32h 10m1 stop
$483KLM
Find Deal
mié., dic. 3 - mar., dic. 9
Lufthansa Logo
3:55 pm - 11:40 pmPDX-OPO
23h 45m2 stops
Lufthansa Logo
6:00 am - 6:45 pmOPO-PDX
20h 45m2 stops
$484Lufthansa
Find Deal
mié., dic. 3 - mar., dic. 9
Lufthansa Logo
3:55 pm - 11:40 pmPDX-OPO
23h 45m2 stops
Lufthansa Logo
6:15 am - 12:37 amOPO-PDX
26h 22m2 stops
$486Lufthansa
Find Deal
sáb., dic. 6 - lun., dic. 15
Multiple Airlines Logo
1:00 pm - 11:40 pmPDX-OPO
26h 40m2 stops
Multiple Airlines Logo
12:30 pm - 2:47 pmOPO-PDX
34h 17m2 stops
$490Multiple Airlines
Find Deal
mié., dic. 3 - mar., dic. 9
United Airlines Logo
3:50 pm - 11:40 amPDX-OPO
35h 50m3 stops
United Airlines Logo
6:00 am - 6:48 pmOPO-PDX
44h 48m3 stops
$524United Airlines
Find Deal
lun., ene. 12 - mar., ene. 20
United Airlines Logo
11:59 pm - 3:05 pmPDX-OPO
31h 06m2 stops
United Airlines Logo
12:30 pm - 10:40 pmOPO-PDX
42h 10m2 stops
$528United Airlines
Find Deal
vie., feb. 13 - sáb., feb. 21
Delta Logo
1:25 pm - 3:25 pmPDX-OPO
18h 00m1 stop
Delta Logo
11:15 am - 12:25 pmOPO-PDX
32h 10m1 stop
$533Delta
Find Deal
mié., feb. 25 - jue., mar. 12
Delta Logo
5:23 am - 10:30 amPDX-OPO
45h 07m2 stops
Delta Logo
11:15 am - 12:25 pmOPO-PDX
32h 10m1 stop
$537Delta
Find Deal
mié., feb. 25 - jue., mar. 12
SWISS Logo
10:56 am - 6:35 pmPDX-OPO
23h 39m2 stops
SWISS Logo
12:05 pm - 10:16 pmOPO-PDX
41h 11m2 stops
$633SWISS
Find Deal
lun., mar. 2 - jue., mar. 12

KLM flights from Portland to Porto

Our best KLM deals on Portland to Porto flight tickets
KLM
Dec 3
PDX1:25 pmPortland
13h 05m
1 stop
OPO10:30 amPorto
Dec 9
OPO11:15 amPorto
32h 10m
1 stop
PDX11:25 amPortland
$483
Find similar
KLM
Dec 3
PDX1:25 pmPortland
13h 05m
1 stop
OPO10:30 amPorto
Dec 9
OPO9:55 amPorto
20h 15m
2 stops
PDX10:10 pmPortland
$493
Find similar
KLM
Feb 26
PDX7:00 amPortland
19h 30m
2 stops
OPO10:30 amPorto
Mar 7
OPO4:10 pmPorto
27h 15m
1 stop
PDX11:25 amPortland
$587
Find similar

Lufthansa flights from Portland to Porto

Our best Lufthansa deals on Portland to Porto flight tickets
Lufthansa
Dec 3
PDX3:55 pmPortland
23h 45m
2 stops
OPO11:40 pmPorto
Dec 9
OPO6:00 amPorto
20h 45m
2 stops
PDX6:45 pmPortland
$484
Find similar
Lufthansa
Dec 6
PDX3:55 pmPortland
23h 45m
2 stops
OPO11:40 pmPorto
Dec 15
OPO6:15 amPorto
26h 22m
2 stops
PDX12:37 amPortland
$486
Find similar
Lufthansa
Feb 27
PDX3:50 pmPortland
23h 50m
2 stops
OPO11:40 pmPorto
Mar 11
OPO6:00 amPorto
21h 49m
2 stops
PDX8:49 pmPortland
$542
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 noviembre 3, 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

lun. 1/12

7:00 am-10:30 am

2 stops19h 30m

Porto

mar. 1/20

11:15 am-11:25 am

1 stop32h 10m

$481

PortlandPorto

PDX - OPO

PDXOPO

Portland

mié. 12/3

1:25 pm-10:30 am

1 stop13h 05m

Porto

mar. 12/9

11:15 am-11:25 am

1 stop32h 10m

$483

PortlandPorto

PDX - OPO

PDXOPO

Portland

mié. 12/3

3:55 pm-11:40 pm

2 stops23h 45m

Porto

mar. 12/9

6:00 am-6:45 pm

2 stops20h 45m

$484

PortlandPorto

PDX - OPO

PDXOPO

Portland

sáb. 12/6

3:55 pm-11:40 pm

2 stops23h 45m

Porto

lun. 12/15

6:15 am-12:37 am

2 stops26h 22m

$486

PortlandPorto

PDX - OPO

PDXOPO

Portland

mié. 12/3

1:00 pm-11:40 pm

2 stops26h 40m

Porto

mar. 12/9

12:30 pm-2:47 pm

2 stops34h 17m

$490

PortlandPorto

PDX - OPO

PDXOPO

Portland

lun. 1/12

3:50 pm-11:40 am

3 stops35h 50m

Porto

mar. 1/20

6:00 am-6:48 pm

3 stops44h 48m

$524

PortlandPorto

PDX - OPO

PDXOPO

Portland

vie. 2/13

11:59 pm-3:05 pm

2 stops31h 06m

Porto

sáb. 2/21

12:30 pm-10:40 pm

2 stops42h 10m

$528

PortlandPorto

PDX - OPO

PDXOPO

Portland

mié. 2/25

1:25 pm-3:25 pm

1 stop18h 00m

Porto

jue. 3/12

11:15 am-12:25 pm

1 stop32h 10m

$533

PortlandPorto

PDX - OPO

PDXOPO

Portland

mié. 2/25

5:23 am-10:30 am

2 stops45h 07m

Porto

jue. 3/12

11:15 am-12:25 pm

1 stop32h 10m

$537

PortlandPorto

PDX - OPO

PDXOPO

Portland

lun. 3/2

10:56 am-6:35 pm

2 stops23h 39m

Porto

jue. 3/12

12:05 pm-10:16 pm

2 stops41h 11m

$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 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 $690. If you aren’t able to travel during the month of November, then book flights to Porto from Portland during December instead. Flights to Porto in December, while not as cheap as those in November, still average around $736.

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 $1,025 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
8,997 reviews
Search United Airlines flights
KLMPriceFrom $647Free CancellationRating
7.7
1,404 reviews
Search KLM flights
DeltaPriceFrom $709Free CancellationRating
7.9
8,001 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
Braga
Matosinhos
Lamego
Esposende
Guimarães
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.

An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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1 adult
mié. 12/3
mié. 12/10
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