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Cheap flights from Portland to Porto from $408

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 1/6. 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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Find the cheapest flights from Portland to Porto

Cheap round-trip flights

United Airlines Logo
11:55 pm - 9:30 amPDX-OPO
25h 35m2 stops
United Airlines Logo
12:35 pm - 9:40 amOPO-PDX
28h 05m2 stops
$549United Airlines
Find Deal
Sun, Mar 1 - Thu, Mar 12
United Airlines Logo
11:55 pm - 9:30 amPDX-OPO
25h 35m2 stops
United Airlines Logo
12:35 pm - 9:40 amOPO-PDX
28h 05m2 stops
$555United Airlines
Find Deal
Sat, Feb 28 - Tue, Mar 10
Air Canada Logo
7:00 pm - 11:40 amPDX-OPO
32h 40m2 stops
Air Canada Logo
6:15 am - 2:45 pmOPO-PDX
39h 30m2 stops
$586Air Canada
Find Deal
Sat, Feb 28 - Fri, Mar 13
Lufthansa Logo
3:50 pm - 11:40 pmPDX-OPO
23h 50m2 stops
Lufthansa Logo
6:00 am - 9:18 pmOPO-PDX
23h 18m2 stops
$590Lufthansa
Find Deal
Wed, Feb 11 - Wed, Feb 18
Delta Logo
7:00 am - 10:30 amPDX-OPO
19h 30m2 stops
Delta Logo
11:15 am - 11:25 amOPO-PDX
32h 10m1 stop
$601Delta
Find Deal
Wed, Feb 11 - Tue, Feb 17
Delta Logo
1:25 pm - 10:30 amPDX-OPO
13h 05m1 stop
Delta Logo
11:15 am - 11:25 amOPO-PDX
32h 10m1 stop
$623Delta
Find Deal
Sun, Feb 8 - Tue, Feb 17
KLM Logo
1:25 pm - 10:30 amPDX-OPO
13h 05m1 stop
KLM Logo
4:10 pm - 4:31 pmOPO-PDX
32h 21m2 stops
$633KLM
Find Deal
Sun, Feb 8 - Mon, Feb 16
Air Canada Logo
7:00 pm - 11:40 amPDX-OPO
32h 40m2 stops
Air Canada Logo
6:15 am - 6:30 pmOPO-PDX
20h 15m2 stops
$635Air Canada
Find Deal
Thu, Feb 5 - Fri, Feb 13
Lufthansa Logo
10:05 am - 11:40 pmPDX-OPO
29h 35m2 stops
Lufthansa Logo
12:30 pm - 6:36 pmOPO-PDX
38h 06m2 stops
$652Lufthansa
Find Deal
Fri, Nov 7 - Tue, Nov 11
KLM Logo
1:25 pm - 6:50 pmPDX-OPO
21h 25m1 stop
KLM Logo
11:15 am - 12:25 pmOPO-PDX
32h 10m1 stop
$662KLM
Find Deal
Mon, Mar 2 - Thu, Mar 12

United Airlines flights from Portland to Porto

Our best United Airlines deals on Portland to Porto flight tickets
United Airlines
Mar 1
PDX11:55 pmPortland
25h 35m
2 stops
OPO9:30 amPorto
Mar 12
OPO12:35 pmPorto
28h 05m
2 stops
PDX9:40 amPortland
$549
Find similar
United Airlines
Feb 28
PDX11:55 pmPortland
25h 35m
2 stops
OPO9:30 amPorto
Mar 10
OPO12:35 pmPorto
28h 05m
2 stops
PDX9:40 amPortland
$555
Find similar
United Airlines
Oct 27
PDX11:12 pmPortland
27h 18m
1 stop
OPO9:30 amPorto
Nov 12
OPO12:35 pmPorto
31h 13m
2 stops
PDX11:48 amPortland
$556
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Delta flights from Portland to Porto

Our best Delta deals on Portland to Porto flight tickets
Delta
Feb 11
PDX7:00 amPortland
19h 30m
2 stops
OPO10:30 amPorto
Feb 17
OPO11:15 amPorto
32h 10m
1 stop
PDX11:25 amPortland
$601
Find similar
Delta
Feb 8
PDX1:25 pmPortland
13h 05m
1 stop
OPO10:30 amPorto
Feb 17
OPO11:15 amPorto
32h 10m
1 stop
PDX11:25 amPortland
$623
Find similar
Delta
Feb 8
PDX1:25 pmPortland
25h 00m
1 stop
OPO10:25 pmPorto
Feb 18
OPO11:25 amPorto
39h 46m
2 stops
PDX7:11 pmPortland
$632
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 September 17, 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

11:55 pm-9:30 am

2 stops25h 35m

Porto

Thu 3/12

12:35 pm-9:40 am

2 stops28h 05m

$549

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 2/28

11:55 pm-9:30 am

2 stops25h 35m

Porto

Tue 3/10

12:35 pm-9:40 am

2 stops28h 05m

$555

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 2/28

7:00 pm-11:40 am

2 stops32h 40m

Porto

Fri 3/13

6:15 am-2:45 pm

2 stops39h 30m

$586

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 2/11

3:50 pm-11:40 pm

2 stops23h 50m

Porto

Wed 2/18

6:00 am-9:18 pm

2 stops23h 18m

$590

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 2/11

7:00 am-10:30 am

2 stops19h 30m

Porto

Tue 2/17

11:15 am-11:25 am

1 stop32h 10m

$601

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 2/8

1:25 pm-10:30 am

1 stop13h 05m

Porto

Tue 2/17

11:15 am-11:25 am

1 stop32h 10m

$623

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 2/8

1:25 pm-10:30 am

1 stop13h 05m

Porto

Mon 2/16

4:10 pm-4:31 pm

2 stops32h 21m

$633

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 2/5

7:00 pm-11:40 am

2 stops32h 40m

Porto

Fri 2/13

6:15 am-6:30 pm

2 stops20h 15m

$635

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 11/7

10:05 am-11:40 pm

2 stops29h 35m

Porto

Tue 11/11

12:30 pm-6:36 pm

2 stops38h 06m

$652

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 3/2

1:25 pm-6:50 pm

1 stop21h 25m

Porto

Thu 3/12

11:15 am-12:25 pm

1 stop32h 10m

$662

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 November is, on average, the cheapest month to fly to Porto from Portland, with most prices found around $752. 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 $760.

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 $1,031 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 12% 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
8,926 reviews
Search United Airlines flights
DeltaPriceFrom $709Free CancellationRating
7.9
7,961 reviews
Search Delta flights
KLMPriceFrom $739Free CancellationRating
7.8
1,386 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
Esposende
Lamego
Chaves
Espinho
Arcos de Valdevez
Viseu
Ponte de Lima
Pinhao
Santa Maria da Feira
Curia
Penafiel
Mesao Frio
Mira

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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