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>

$257 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

$479

Overall average: $845

Multiple Airlines

Mon 4/13Wed 4/22

SEA - OPO • 1 stop

Cheapest one-way

$257

Typical prices: $351-$928

Air Canada

Sat 8/8

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

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

Mon, Apr 13 - Wed, Apr 22

6:40 pm - 10:00 pm

SEA

OPO

19h 20m

1 stop

4:20 pm - 11:45 am

OPO

SEA

27h 25m

1 stop

$479Multiple Airlines

Sun, Apr 12 - Thu, Apr 23

6:00 am - 6:10 pm

SEA

OPO

28h 10m

2 stops

5:00 am - 11:45 am

OPO

SEA

14h 45m

1 stop

$488Delta

Mon, Apr 13 - Wed, Apr 22

6:40 pm - 10:00 pm

SEA

OPO

19h 20m

1 stop

5:00 am - 5:16 pm

OPO

SEA

20h 16m

2 stops

$489Delta

Mon, Apr 13 - Thu, Apr 23

6:00 am - 7:40 am

SEA

OPO

17h 40m

2 stops

8:20 am - 10:38 pm

OPO

SEA

22h 18m

2 stops

$501American Airlines

Mon, Apr 13 - Thu, Apr 23

8:20 pm - 7:50 pm

SEA

OPO

15h 30m

1 stop

8:20 am - 10:38 pm

OPO

SEA

22h 18m

2 stops

$503British Airways

Wed, Mar 11 - Wed, Mar 18

8:00 am - 3:25 pm

SEA

OPO

24h 25m

2 stops

6:00 am - 12:59 am

OPO

SEA

25h 59m

2 stops

$512United Airlines

Wed, Mar 11 - Wed, Mar 18

8:00 am - 3:25 pm

SEA

OPO

24h 25m

2 stops

12:35 pm - 10:53 pm

OPO

SEA

17h 18m

1 stop

$521United Airlines

Thu, Apr 16 - Thu, Apr 30

1:52 pm - 8:00 pm

PDX

OPO

22h 08m

2 stops

8:20 am - 11:54 pm

OPO

PDX

23h 34m

2 stops

$550Iberia

Sun, Apr 12 - Fri, Apr 24

6:22 am - 11:45 am

PDX

OPO

21h 23m

2 stops

12:25 pm - 11:54 pm

OPO

PDX

19h 29m

2 stops

$625American Airlines

Thu, Apr 16 - Thu, Apr 30

10:35 am - 4:00 pm

PDX

OPO

21h 25m

2 stops

8:20 am - 11:54 pm

OPO

PDX

23h 34m

2 stops

$650Iberia

Useful Info

Low season	January
High season	July
Cheapest flight	$257

Best time to beat the crowds with an average 24% drop in price.

Most popular time to fly with an average 25% 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

Arcos de Valdevez

Espinho

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

$257 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