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>

$347 Cheap Flights from Washington to Porto

OPO

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

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Cheapest round-trip

$461

Overall average: $896

Lufthansa

Sat 2/7Mon 2/23

SEA - OPO • 1 stop

Cheapest one-way

$347

Typical prices: $504-$548

Multiple Airlines

Sat 1/31

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

Sat, Feb 7 - Mon, Feb 23

2:00 pm - 3:05 pm

SEA

OPO

17h 05m1 stop

4:15 pm - 7:03 pm

OPO

SEA

34h 48m2 stops

$461Lufthansa

Tue, Feb 24 - Sun, Mar 1

8:10 am - 2:45 pm

SEA

OPO

22h 35m2 stops

6:15 am - 1:20 pm

OPO

SEA

15h 05m1 stop

$475Multiple Airlines

Tue, Feb 24 - Sun, Mar 1

1:40 pm - 10:30 am

SEA

OPO

12h 50m1 stop

4:10 pm - 11:35 am

OPO

SEA

27h 25m1 stop

$478KLM

Sat, Feb 7 - Mon, Feb 23

1:40 pm - 10:30 am

SEA

OPO

12h 50m1 stop

11:15 am - 11:40 am

OPO

SEA

32h 25m1 stop

$479Delta

Wed, Jan 14 - Wed, Jan 21

2:10 pm - 10:25 am

SEA

OPO

36h 15m1 stop

5:00 am - 11:50 am

OPO

SEA

14h 50m1 stop

$480Multiple Airlines

Wed, Jan 14 - Wed, Jan 21

3:10 pm - 1:15 pm

SEA

OPO

14h 05m1 stop

12:10 pm - 9:12 pm

OPO

SEA

41h 02m2 stops

$482Multiple Airlines

Sat, Jan 31 - Sat, Feb 7

3:10 pm - 10:30 am

SEA

OPO

35h 20m1 stop

11:15 am - 11:40 am

OPO

SEA

32h 25m1 stop

$484KLM

Sat, Feb 7 - Mon, Feb 23

10:58 am - 11:10 am

SEA

OPO

40h 12m2 stops

7:20 pm - 9:01 pm

OPO

SEA

33h 41m2 stops

$485SWISS

Thu, Jan 15 - Thu, Feb 5

6:00 am - 11:45 am

PDX

OPO

21h 45m2 stops

8:20 am - 8:22 pm

OPO

PDX

20h 02m2 stops

$510American Airlines

Tue, Mar 17 - Tue, Mar 31

7:05 am - 10:30 am

PDX

OPO

20h 25m2 stops

5:00 am - 11:10 am

OPO

PDX

14h 10m1 stop

$682Delta

Useful Info

Low season	February
High season	July
Cheapest flight	$347

Best time to beat the crowds with an average 17% 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

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

$347 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