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>

$303 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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Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$474

Overall average: $882

Multiple Airlines

Wed 1/14Wed 1/21

SEA - OPO • 2 stops

Cheapest one-way

$303

Typical prices: $575-$589

Multiple Airlines

Fri 12/5

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

Recent round-trip flight deals from Washington to Porto

Wed, Jan 14 - Wed, Jan 21

2:35 pm - 2:55 pmSEA-OPO

16h 20m2 stops

6:45 am - 5:00 pmOPO-SEA

18h 15m2 stops

$474Multiple Airlines

Find Deal

Wed, Jan 14 - Wed, Jan 21

2:10 pm - 10:25 amSEA-OPO

36h 15m1 stop

11:15 am - 11:50 amOPO-SEA

32h 35m1 stop

$479KLM

Find Deal

Sat, Feb 21 - Sat, Feb 28

7:30 am - 12:50 pmPDX-OPO

21h 20m2 stops

6:00 am - 10:56 pmOPO-PDX

24h 56m2 stops

$486Lufthansa

Find Deal

Sat, Feb 21 - Sat, Feb 28

7:00 am - 9:30 amPDX-OPO

18h 30m2 stops

6:00 am - 8:43 pmOPO-PDX

22h 43m2 stops

$489United Airlines

Find Deal

Wed, Jan 14 - Wed, Jan 21

2:10 pm - 10:25 amSEA-OPO

36h 15m1 stop

6:00 am - 8:00 pmOPO-SEA

22h 00m2 stops

$489KLM

Find Deal

Fri, Jan 9 - Sun, Jan 18

12:35 pm - 11:15 amSEA-OPO

38h 40m2 stops

6:00 am - 10:16 pmOPO-SEA

24h 16m2 stops

$490Multiple Airlines

Find Deal

Wed, Jan 21 - Fri, Jan 30

7:10 am - 10:30 amSEA-OPO

19h 20m2 stops

6:30 am - 11:15 pmOPO-SEA

24h 45m2 stops

$492Delta

Find Deal

Wed, Jan 21 - Fri, Jan 30

3:10 pm - 1:15 pmSEA-OPO

14h 05m1 stop

4:15 pm - 12:10 pmOPO-SEA

27h 55m1 stop

$493Lufthansa

Find Deal

Sat, Feb 21 - Sat, Feb 28

7:00 am - 9:30 amPDX-OPO

18h 30m2 stops

12:35 pm - 8:43 pmOPO-PDX

16h 08m1 stop

$499United Airlines

Find Deal

Thu, Feb 19 - Sun, Mar 1

6:00 am - 3:25 pmPDX-OPO

25h 25m2 stops

5:00 am - 11:25 amOPO-PDX

14h 25m1 stop

$638Delta

Find Deal

Useful Info

Low season	February
High season	July
Cheapest flight	$303

Best time to beat the crowds with an average 17% drop in price.

Most popular time to fly with an average 21% 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

Caminha

Baiao

Mira

Santa Maria da Feira

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

$303 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

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