Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Portland to Porto from $384

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 8/17. 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.
American Airlines Logo
8:00 am - 11:45 am
PDX
-
OPO
19h 45m
2 stops
American Airlines Logo
8:20 am - 11:48 pm
OPO
-
PDX
23h 28m
2 stops
$967American Airlines
Wed, Apr 29 - Sun, May 10
Multiple Airlines Logo
3:30 pm - 9:30 am
PDX
-
OPO
34h 00m
3 stops
Multiple Airlines Logo
10:30 pm - 9:30 am
OPO
-
PDX
43h 00m
3 stops
$970Multiple Airlines
Tue, Jun 2 - Tue, Jun 9
Multiple Airlines Logo
10:10 am - 6:15 pm
PDX
-
OPO
24h 05m
2 stops
Multiple Airlines Logo
6:20 am - 11:03 pm
OPO
-
PDX
24h 43m
2 stops
$985Multiple Airlines
Sun, May 17 - Sun, May 24
Delta Logo
1:05 pm - 10:40 am
PDX
-
OPO
13h 35m
1 stop
Delta Logo
5:00 am - 11:10 am
OPO
-
PDX
14h 10m
1 stop
$1,000Delta
Wed, Apr 29 - Sun, May 10
KLM Logo
1:05 pm - 10:40 am
PDX
-
OPO
13h 35m
1 stop
KLM Logo
5:00 am - 11:10 am
OPO
-
PDX
14h 10m
1 stop
$1,001KLM
Wed, Apr 29 - Sun, May 10
Delta Logo
7:00 am - 10:40 am
PDX
-
OPO
19h 40m
2 stops
Delta Logo
5:00 am - 11:10 am
OPO
-
PDX
14h 10m
1 stop
$1,005Delta
Wed, Apr 29 - Sun, May 10
KLM Logo
3:35 pm - 3:30 pm
PDX
-
OPO
15h 55m
2 stops
KLM Logo
5:00 am - 11:10 am
OPO
-
PDX
14h 10m
1 stop
$1,006KLM
Wed, Apr 29 - Sun, May 10
Delta Logo
9:55 am - 3:25 pm
PDX
-
OPO
21h 30m
2 stops
Delta Logo
5:00 am - 5:11 pm
OPO
-
PDX
20h 11m
2 stops
$1,010Delta
Wed, Apr 29 - Sun, May 10
Delta Logo
7:00 am - 10:30 am
PDX
-
OPO
19h 30m
1 stop
Delta Logo
9:25 am - 10:02 pm
OPO
-
PDX
20h 37m
2 stops
$1,012Delta
Tue, Jul 7 - Tue, Jul 14
KLM Logo
5:05 pm - 6:20 pm
PDX
-
OPO
17h 15m
2 stops
KLM Logo
5:00 am - 2:48 pm
OPO
-
PDX
17h 48m
2 stops
$1,015KLM
Wed, Apr 29 - Sun, May 10

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Air Canada flights from Portland to Porto

Our best Air Canada deals on Portland to Porto flight tickets
Air Canada
Sep 26
PDX3:30 pmPortland
55h 30m
2 stops
OPO7:00 amPorto
Oct 7
OPO12:45 pmPorto
40h 20m
2 stops
PDX9:05 pmPortland
$850
Air Canada
Sep 26
PDX7:45 pmPortland
51h 15m
2 stops
OPO7:00 amPorto
Oct 8
OPO11:50 amPorto
53h 41m
2 stops
PDX9:31 amPortland
$863
Air Canada
Sep 17
PDX7:45 pmPortland
27h 25m
2 stops
OPO7:10 amPorto
Sep 23
OPO12:45 pmPorto
34h 20m
2 stops
PDX3:05 pmPortland
$910

United Airlines flights from Portland to Porto

Our best United Airlines deals on Portland to Porto flight tickets
United Airlines
Oct 7
PDX10:56 amPortland
14h 49m
1 stop
OPO9:45 amPorto
Oct 14
OPO12:45 pmPorto
37h 30m
2 stops
PDX6:15 pmPortland
$851
United Airlines
Oct 6
PDX3:36 pmPortland
31h 24m
3 stops
OPO7:00 amPorto
Oct 13
OPO12:15 pmPorto
34h 50m
2 stops
PDX3:05 pmPortland
$854
United Airlines
Sep 27
PDX10:59 pmPortland
24h 01m
2 stops
OPO7:00 amPorto
Oct 7
OPO12:35 pmPorto
16h 38m
1 stop
PDX9:13 pmPortland
$874

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 April 20, 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

Wed 4/29

8:00 am-11:45 am

2 stops19h 45m

Porto

Sun 5/10

8:20 am-11:48 pm

2 stops23h 28m

$967

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 6/2

3:30 pm-9:30 am

3 stops34h 00m

Porto

Tue 6/9

10:30 pm-9:30 am

3 stops43h 00m

$970

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 5/17

10:10 am-6:15 pm

2 stops24h 05m

Porto

Sun 5/24

6:20 am-11:03 pm

2 stops24h 43m

$985
Quickest round-trip

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 4/29

1:05 pm-10:40 am

1 stop13h 35m

Porto

Sun 5/10

5:00 am-11:10 am

1 stop14h 10m

$1,000

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 4/29

1:05 pm-10:40 am

1 stop13h 35m

Porto

Sun 5/10

5:00 am-11:10 am

1 stop14h 10m

$1,001

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 4/29

7:00 am-10:40 am

2 stops19h 40m

Porto

Sun 5/10

5:00 am-11:10 am

1 stop14h 10m

$1,005

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 4/29

3:35 pm-3:30 pm

2 stops15h 55m

Porto

Sun 5/10

5:00 am-11:10 am

1 stop14h 10m

$1,006

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 4/29

9:55 am-3:25 pm

2 stops21h 30m

Porto

Sun 5/10

5:00 am-5:11 pm

2 stops20h 11m

$1,010

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 7/7

7:00 am-10:30 am

1 stop19h 30m

Porto

Tue 7/14

9:25 am-10:02 pm

2 stops20h 37m

$1,012

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 4/29

5:05 pm-6:20 pm

2 stops17h 15m

Porto

Sun 5/10

5:00 am-2:48 pm

2 stops17h 48m

$1,015

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 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 $908 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 17% 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

14h 49m

Direct flights

None
The fastest flight from Portland to Porto takes 14h 49m
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 14h 49m, 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
8,430 reviews
Search Delta flights
KLMPriceFrom $498Free CancellationRating
7.8
1,501 reviews
Search KLM flights
United AirlinesPriceFrom $537Free CancellationRating
7.4
9,611 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.

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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 5/20
Wed 5/27
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal