How does KAYAK find such low prices on flights from Washington to Porto?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Porto. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Porto?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Washington is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Washington to Porto?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to Washington with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Porto?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$360 CHEAP FLIGHTS from Washington to Porto

OPO

KAYAK searches hundreds of travel sites at once for deals on flights to Porto

...and more

Travelers love KAYAK

41,299,237 searches in the past 7 days on KAYAK

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Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$459

Overall average: $914

Multiple Airlines

Wed 2/11Sun 2/22

SEA - OPO • 1 stop

Cheapest one-way

$360

Multiple Airlines

Sat 2/21

SEA - OPO • 2 stops

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Porto!

Flight Deals

Cheap Flights from Washington to Porto

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington to Porto that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Washington to Porto

Wed, Feb 11 - Sun, Feb 22

3:10 pm - 1:15 pm

SEA

OPO

14h 05m1 stop

6:15 am - 10:06 pm

OPO

SEA

23h 51m2 stops

$459Multiple Airlines

Wed, Jan 28 - Tue, Feb 10

9:59 pm - 10:25 am

SEA

OPO

28h 26m2 stops

11:15 am - 11:40 am

OPO

SEA

32h 25m1 stop

$477Delta

Tue, Jan 27 - Fri, Feb 13

1:40 pm - 10:30 am

SEA

OPO

12h 50m1 stop

11:15 am - 11:40 am

OPO

SEA

32h 25m1 stop

$478Delta

Wed, Jan 28 - Mon, Feb 9

2:10 pm - 10:25 am

SEA

OPO

36h 15m1 stop

11:15 am - 11:40 am

OPO

SEA

32h 25m1 stop

$479Delta

Thu, Jan 29 - Mon, Feb 9

3:10 pm - 1:20 pm

SEA

OPO

14h 10m1 stop

11:15 am - 11:40 am

OPO

SEA

32h 25m1 stop

$483KLM

Tue, Jan 27 - Fri, Feb 13

8:10 am - 12:50 pm

SEA

OPO

20h 40m2 stops

6:30 am - 7:16 pm

OPO

SEA

20h 46m2 stops

$487Air Canada

Tue, Jan 20 - Tue, Jan 27

11:59 am - 3:25 pm

PDX

OPO

19h 26m2 stops

9:55 am - 11:25 am

OPO

PDX

33h 30m1 stop

$488KLM

Tue, Jan 20 - Tue, Jan 27

7:00 am - 12:50 pm

PDX

OPO

21h 50m2 stops

6:00 am - 6:10 pm

OPO

PDX

20h 10m2 stops

$493Lufthansa

Tue, Jan 20 - Tue, Jan 27

7:00 am - 11:40 am

PDX

OPO

20h 40m2 stops

6:00 am - 9:12 pm

OPO

PDX

23h 12m3 stops

$510United Airlines

Sat, Feb 7 - Sat, Feb 28

1:35 pm - 3:15 pm

PDX

OPO

41h 40m3 stops

6:00 am - 8:43 pm

OPO

PDX

22h 43m2 stops

$514United Airlines

Useful Info

Low season	February
High season	July
Cheapest flight	$360

Best time to beat the crowds with an average 18% drop in price.

Most popular time to fly with an average 20% increase in price.

Flight from Seattle to Porto

How does KAYAK find such low prices on flights from Washington to Porto?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Porto.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Porto?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Washington is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Washington to Porto?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to Washington with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Porto?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Lamego

Guimarães

Pinhao

Chaves

Esposende

Viseu

Espinho

Arcos de Valdevez

Ponte de Lima

Baiao

Caminha

Santa Maria da Feira

Mira

Penafiel

Amares

Curia

Everything you need to know for your flight to Porto

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Porto

Porto (OPO)

OPO

$360 Find Cheap Flights from Washington to Porto

KAYAK searches hundreds of travel sites at once for deals on flights to Porto

Everything you should know

Cheap Flights from Washington to Porto

Recent round-trip flight deals from Washington to Porto

Recent one-way flight deals from Washington to Porto

Recent last minute flight deals from Washington to Porto

Good to know

FAQs for booking flights from Washington to Porto

How does KAYAK find such low prices on flights from Washington to Porto?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Porto.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Porto?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Washington is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Washington to Porto?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to Washington with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Porto?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Porto?

Everything you need to know for your flight to Porto

Information on the airport you'll fly into in Porto

Cabin class types available on flights to Washington

Complete your trip to Porto with a hotel stay or car rental

Find direct flights for Porto

Flights to other popular destinations

Flights from domestic origins to Porto

Choose which airport to fly into in Porto

Find deals for your return flight