Find the Cheapest Flights from Washington Dulles International Airport to Portugal

Unlock the cheapest flights and the best airfares from Washington Dulles International Airport to Portugal. Make your dream trip both memorable and affordable!

Sun, Jul 5WAS-LIS
Passaredo Linhas Aereas

oneway$407

Fri, Jul 24WAS-OPO
Royal Air Maroc

oneway$438

Fri, Jun 26WAS-FNC
Porter Airlines

oneway$581

Wed, Sep 2WAS-OPO
TAP Portugal

$780

Thu, Sep 17WAS-LIS
Turkish Airlines

$802

Thu, Sep 24WAS-PDL
Frontier Airlines

$916

See more deals See less

Washington Dulles International Airport to Portugal: Flight information

Cheapest flight found$407

Cheapest month to flyJuly

Most popular airlinePassaredo Linhas Aereas

Average flight duration1d 35m

Cheapest flight found

Jul 2026

$407

Jun 2026

$658

FAQs

How to find cheap flights to Portugal from Washington Dulles International Airport etc..

How long is the flight from Washington Dulles International Airport to Portugal?

What airlines fly from Washington Dulles International Airport to Portugal?

When to buy cheap flights from Washington Dulles International Airport to Portugal?

How can I find the cheapest flights from Washington Dulles International Airport?

How can I cancel / change my flight?

Do the prices include taxes and fees?

Does the flight price include baggage fees?

What should I do if my flight is canceled?

Travel Like Never Before

• Search And compare between flights easily
• A single travel booking that allows you to visit several cities during one trip

Download OUR APP NOW