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Cheap flights from Portland to Porto from $317

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 8/19. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:45 pm - 8:00 pm
PDX
-
OPO
18h 15m
2 stops
Multiple Airlines Logo
8:20 am - 11:51 pm
OPO
-
PDX
23h 31m
2 stops
$754Multiple Airlines
Sun, Nov 1 - Tue, Nov 24
American Airlines Logo
1:30 pm - 4:00 pm
PDX
-
OPO
18h 30m
2 stops
American Airlines Logo
8:20 am - 11:51 pm
OPO
-
PDX
23h 31m
2 stops
$756American Airlines
Sun, Oct 18 - Tue, Nov 17
Air Canada Logo
7:45 pm - 7:00 am
PDX
-
OPO
51h 15m
2 stops
Air Canada Logo
6:15 am - 9:25 am
OPO
-
PDX
35h 10m
2 stops
$793Air Canada
Sat, Oct 17 - Fri, Nov 20
Air Canada Logo
10:10 am - 6:30 pm
PDX
-
OPO
24h 20m
2 stops
Air Canada Logo
6:15 am - 2:40 pm
OPO
-
PDX
40h 25m
2 stops
$799Air Canada
Wed, Oct 21 - Fri, Nov 20
Lufthansa Logo
3:30 pm - 7:00 am
PDX
-
OPO
55h 30m
2 stops
Lufthansa Logo
6:00 am - 12:02 am
OPO
-
PDX
26h 02m
2 stops
$801Lufthansa
Sat, Oct 17 - Wed, Nov 18
United Airlines Logo
10:56 am - 9:45 am
PDX
-
OPO
14h 49m
1 stop
United Airlines Logo
12:30 pm - 9:30 am
OPO
-
PDX
29h 00m
2 stops
$802United Airlines
Sun, Oct 18 - Tue, Nov 17
Multiple Airlines Logo
7:45 pm - 7:00 am
PDX
-
OPO
27h 15m
2 stops
Multiple Airlines Logo
7:20 pm - 10:18 pm
OPO
-
PDX
34h 58m
2 stops
$803Multiple Airlines
Sun, Oct 18 - Mon, Nov 16
United Airlines Logo
5:00 am - 7:00 am
PDX
-
OPO
18h 00m
2 stops
United Airlines Logo
6:00 am - 6:05 pm
OPO
-
PDX
20h 05m
2 stops
$805United Airlines
Wed, Oct 21 - Wed, Nov 18
United Airlines Logo
10:56 am - 9:45 am
PDX
-
OPO
14h 49m
1 stop
United Airlines Logo
12:35 pm - 9:21 pm
OPO
-
PDX
16h 46m
1 stop
$811United Airlines
Sun, Oct 18 - Fri, Nov 20
SWISS Logo
11:07 am - 11:25 am
PDX
-
OPO
40h 18m
2 stops
SWISS Logo
7:20 pm - 10:18 pm
OPO
-
PDX
34h 58m
2 stops
$814SWISS
Tue, Oct 20 - Mon, Nov 16

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Air Canada flights from Portland to Porto

Our best Air Canada deals on Portland to Porto flight tickets
Air Canada
Oct 17
PDX7:45 pmPortland
51h 15m
2 stops
OPO7:00 amPorto
Nov 20
OPO6:15 amPorto
35h 10m
2 stops
PDX9:25 amPortland
$793
Air Canada
Oct 21
PDX10:10 amPortland
24h 20m
2 stops
OPO6:30 pmPorto
Nov 20
OPO6:15 amPorto
40h 25m
2 stops
PDX2:40 pmPortland
$799
Air Canada
Oct 15
PDX3:30 pmPortland
55h 30m
2 stops
OPO7:00 amPorto
Nov 20
OPO6:15 amPorto
20h 15m
2 stops
PDX6:30 pmPortland
$843

Lufthansa flights from Portland to Porto

Our best Lufthansa deals on Portland to Porto flight tickets
Lufthansa
Oct 17
PDX3:30 pmPortland
55h 30m
2 stops
OPO7:00 amPorto
Nov 18
OPO6:00 amPorto
26h 02m
2 stops
PDX12:02 amPortland
$801
Lufthansa
Oct 15
PDX3:30 pmPortland
31h 40m
2 stops
OPO7:10 amPorto
Nov 17
OPO12:30 pmPorto
19h 32m
2 stops
PDX12:02 amPortland
$851
Lufthansa
Oct 21
PDX2:14 pmPortland
25h 11m
2 stops
OPO11:25 pmPorto
Nov 14
OPO6:00 amPorto
22h 49m
2 stops
PDX8:49 pmPortland
$860

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 May 6, 2026.
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

Cheapest round-trip

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 11/1

5:45 pm-8:00 pm

2 stops18h 15m

Porto

Tue 11/24

8:20 am-11:51 pm

2 stops23h 31m

$754

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 10/18

1:30 pm-4:00 pm

2 stops18h 30m

Porto

Tue 11/17

8:20 am-11:51 pm

2 stops23h 31m

$756

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 10/17

7:45 pm-7:00 am

2 stops51h 15m

Porto

Fri 11/20

6:15 am-9:25 am

2 stops35h 10m

$793

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 10/21

10:10 am-6:30 pm

2 stops24h 20m

Porto

Fri 11/20

6:15 am-2:40 pm

2 stops40h 25m

$799

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 10/17

3:30 pm-7:00 am

2 stops55h 30m

Porto

Wed 11/18

6:00 am-12:02 am

2 stops26h 02m

$801

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 10/18

10:56 am-9:45 am

1 stop14h 49m

Porto

Tue 11/17

12:30 pm-9:30 am

2 stops29h 00m

$802

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 10/18

7:45 pm-7:00 am

2 stops27h 15m

Porto

Mon 11/16

7:20 pm-10:18 pm

2 stops34h 58m

$803

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 10/21

5:00 am-7:00 am

2 stops18h 00m

Porto

Wed 11/18

6:00 am-6:05 pm

2 stops20h 05m

$805
Quickest round-trip

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 10/18

10:56 am-9:45 am

1 stop14h 49m

Porto

Fri 11/20

12:35 pm-9:21 pm

1 stop16h 46m

$811

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 10/20

11:07 am-11:25 am

2 stops40h 18m

Porto

Mon 11/16

7:20 pm-10:18 pm

2 stops34h 58m

$814

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 January is, on average, the cheapest month to fly to Porto from Portland, with most prices found around $484. If you aren’t able to travel during the month of January, then book flights to Porto from Portland during December instead. Flights to Porto in December, while not as cheap as those in January, still average around $589.

How far in advance should I book a flight from Portland 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 $903 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 $733 on momondo.

Can stopping save me money on Portland to Porto flights?

You could potentially save up to 40% 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

18h 15m

Direct flights

None
The fastest flight from Portland to Porto takes 18h 15m
There are no direct flights from Portland to Porto. There are no popular flight routes from Portland to Porto.
Search flight deals

Frequently asked questions about flying from Portland to Porto

  • 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 18h 15m, 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
DeltaPriceFrom $494Free CancellationRating
7.9
8,459 reviews
Search Delta flights
KLMPriceFrom $498Free CancellationRating
7.8
1,511 reviews
Search KLM flights
United AirlinesPriceFrom $537Free CancellationRating
7.4
9,684 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
Braga
Aveiro
Matosinhos
Lamego
Esposende
Chaves
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Ponte de Lima
Viseu
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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