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>

$239 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

$420

Overall average: $697

Lufthansa

Wed 3/4Thu 3/12

SEA - OPO • 1 stop

Cheapest one-way

$239

Typical prices: $538-$620

Air France

Sun 3/29

SEA - OPO • 1 stop

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, Mar 4 - Thu, Mar 12

3:10 pm - 1:15 pm

SEA

OPO

14h 05m

1 stop

6:00 am - 7:03 pm

OPO

SEA

20h 03m

2 stops

$420Lufthansa

Wed, Mar 4 - Thu, Mar 12

3:10 pm - 1:15 pm

SEA

OPO

14h 05m

1 stop

6:00 am - 7:03 pm

OPO

SEA

20h 03m

2 stops

$421Lufthansa

Wed, Mar 4 - Thu, Mar 12

3:10 pm - 11:40 pm

SEA

OPO

24h 30m

1 stop

7:25 pm - 11:28 pm

OPO

SEA

35h 03m

2 stops

$425Multiple Airlines

Wed, Mar 4 - Thu, Mar 12

7:15 am - 4:45 pm

SEA

OPO

25h 30m

2 stops

8:20 am - 11:13 pm

OPO

SEA

21h 53m

2 stops

$428British Airways

Fri, Feb 27 - Fri, Mar 6

3:10 pm - 11:40 pm

SEA

OPO

24h 30m

1 stop

6:00 am - 7:03 pm

OPO

SEA

21h 03m

2 stops

$429Lufthansa

Fri, Feb 27 - Fri, Mar 6

3:10 pm - 11:40 pm

SEA

OPO

24h 30m

1 stop

6:00 am - 10:45 pm

OPO

SEA

24h 45m

2 stops

$430Lufthansa

Mon, Feb 23 - Tue, Mar 10

11:35 pm - 9:30 am

SEA

OPO

25h 55m

1 stop

12:35 pm - 11:10 am

OPO

SEA

29h 35m

1 stop

$437United Airlines

Mon, Feb 16 - Thu, Feb 26

5:45 pm - 5:35 pm

PDX

OPO

15h 50m

1 stop

8:20 am - 12:17 am

OPO

PDX

23h 57m

2 stops

$448British Airways

Sun, Feb 22 - Thu, Mar 5

11:59 pm - 9:30 am

PDX

OPO

25h 31m

2 stops

12:35 pm - 9:52 pm

OPO

PDX

17h 17m

1 stop

$450United Airlines

Mon, Feb 16 - Mon, Feb 23

11:40 pm - 7:40 am

PDX

OPO

24h 00m

2 stops

8:40 pm - 1:02 pm

OPO

PDX

24h 22m

2 stops

$461American Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$239

Best time to beat the crowds with an average 15% 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

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

$238 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