$356 Cheap Flights from Washington (IAD) to Lisbon (LIS)

View $356 flight on Tue, Jul 7, 2026Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Humberto Delgado Airport (LIS)

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Cheap Flights from Washington to Lisbon (IAD-LIS)

Prices were available within the past 7 days and start at $356 for one-way flights and $561 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Mon, May 18 - Sat, May 23
IAD
Washington
LIS
Lisbon
$561 Roundtrip, found 20 hours ago
$561
Roundtrip
found 20 hours ago
Select Scandinavian Airlines flight, departing Mon, May 18 from Washington to Lisbon, returning Sat, May 23, priced at $561 found 20 hours ago
Royal Air Maroc
Fri, Apr 24 - Sun, Apr 26
IAD
Washington
LIS
Lisbon
$572 Roundtrip, just found
$572
Roundtrip
just found
Select Royal Air Maroc flight, departing Fri, Apr 24 from Washington to Lisbon, returning Sun, Apr 26, priced at $572 just found
Turkish Airlines
Tue, Mar 31 - Wed, Apr 8
IAD
Washington
LIS
Lisbon
$668 Roundtrip, just found
$668
Roundtrip
just found
Select Turkish Airlines flight, departing Tue, Mar 31 from Washington to Lisbon, returning Wed, Apr 8, priced at $668 just found
TAP Portugal
Wed, Feb 18 - Tue, Feb 24
IAD
Washington
LIS
Lisbon
$692 Roundtrip, just found
$692
Roundtrip
just found
Select TAP Portugal flight, departing Wed, Feb 18 from Washington to Lisbon, returning Tue, Feb 24, priced at $692 just found
Aer Lingus
Mon, Apr 13 - Thu, Apr 23
IAD
Washington
LIS
Lisbon
$694 Roundtrip, found 6 hours ago
$694
Roundtrip
found 6 hours ago
Select Aer Lingus flight, departing Mon, Apr 13 from Washington to Lisbon, returning Thu, Apr 23, priced at $694 found 6 hours ago
United
Sun, Apr 26 - Wed, May 6
IAD
Washington
LIS
Lisbon
$780 Roundtrip, found 6 hours ago
$780
Roundtrip
found 6 hours ago
Select United flight, departing Sun, Apr 26 from Washington to Lisbon, returning Wed, May 6, priced at $780 found 6 hours ago
Icelandair
Sat, Apr 11 - Sun, Apr 19
IAD
Washington
LIS
Lisbon
$784 Roundtrip, found 10 hours ago
$784
Roundtrip
found 10 hours ago
Select Icelandair flight, departing Sat, Apr 11 from Washington to Lisbon, returning Sun, Apr 19, priced at $784 found 10 hours ago
Delta
Sun, Apr 26 - Wed, May 6
IAD
Washington
LIS
Lisbon
$786 Roundtrip, found 6 hours ago
$786
Roundtrip
found 6 hours ago
Select Delta flight, departing Sun, Apr 26 from Washington to Lisbon, returning Wed, May 6, priced at $786 found 6 hours ago
Iberia
Mon, Apr 13 - Wed, Apr 22
IAD
Washington
LIS
Lisbon
$793 Roundtrip, found 5 hours ago
$793
Roundtrip
found 5 hours ago
Select Iberia flight, departing Mon, Apr 13 from Washington to Lisbon, returning Wed, Apr 22, priced at $793 found 5 hours ago
Air Canada
Tue, Nov 17 - Tue, Nov 24
IAD
Washington
LIS
Lisbon
$799 Roundtrip, found 1 day ago
$799
Roundtrip
found 1 day ago
Select Air Canada flight, departing Tue, Nov 17 from Washington to Lisbon, returning Tue, Nov 24, priced at $799 found 1 day ago

Alternative airports near Lisbon

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Humberto Delgado LIS. Cheapest option available. Flights from $728
LIS
Humberto Delgado
Cheapest
Flights from $728

Find the cheapest month to fly from Washington (IAD) to Lisbon (LIS)

February is typically the cheapest month to fly

From $469 - $895 per traveler.
Flights from Washington (IAD) to Lisbon (LIS)
Origin airport
Washington Dulles Intl.
Destination airport
Humberto Delgado
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$561
Distance
3582 mi
Average flight time
12 hours 5 mins

Washington to Lisbon Flights

The cheapest times to fly from Washington to Lisbon

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Lisbon are during the month of May. You can find some of the cheapest flights from Washington to Lisbon with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Lisbon

Sunday is one of the best days to book for cheap flights from Washington to Lisbon: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Lisbon

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Lisbon in 2026. You can also book with separate airlines for your outbound and return journeys, from $356 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Lisbon flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Lisbon airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado) cost?
You can find cheap one-way flights from $356 and cheap return flights from $561 Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado) with Expedia. One-way flights typically cost between $626 and $7560, and return flights often range between $1009 and $6050. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado)?
October is the cheapest month to fly from Washington, DC (IAD) to Lisbon (LIS), with average round-trip fares around $990. This price is about 14% lower than the average fare throughout the year, likely due to reduced travel demand after the summer peak. Other budget-friendly months for this route include September and November.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado)?
There are 2 airlines offering direct flights from IAD to LIS:

  • TAP Portugal operates around 10 direct flights from IAD to LIS every week
  • United operates around 7 direct flights from IAD to LIS every week

What is the cheapest airline that flies from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado)?
Royal Air Maroc is one of the cheapest airlines offering connecting flights from Washington, DC (IAD) to Lisbon (LIS), with round-trip tickets starting from around $948. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado)?
To find a cheap flight from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado)?
The best airline to fly with from Washington, DC (IAD) to Lisbon (LIS) will differ from traveler to traveler. If you like to fly early, TAP Portugal offers early morning flights. If price is the most important factor, TAP Portugal typically offers the lowest fares. United offers the most daily flights from Washington to Lisbon, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado)?
For your journey from Washington, DC (IAD) to Lisbon (LIS), October and September are the best months to fly. During these months, return flights average around $990, providing a good balance of price and travel experience. September offers warm weather and vibrant city life, while October sees fewer tourists, allowing for a more relaxed visit.*Prices based on flights available on Expedia in the last year.
How many flights per day from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado)?
On average, there are around 2 nonstop flights per day from Washington Dulles Intl. (IAD) to Humberto Delgado (LIS). For more options, look at flights that include layovers.
What is the earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado)?
The earliest flight from Washington Dulles International Airport (IAD) to Humberto Delgado Airport (LIS) typically departs at around 6:00 AM local time, operated by Delta Airlines. This service is seasonal and available in January, so be sure to check for availability if you're planning a trip. An early departure allows you to arrive in Lisbon with plenty of time to explore the city. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado)?
The most popular departure times for flights from Washington, DC (IAD) to Lisbon (LIS) are from 9pm to midnight. About 36% of passengers prefer this time window. Many major carriers, including TAP Portugal, United and British Airways, offer flights during this window. This timing works well because it allows you to enjoy a full day in Washington before your evening flight.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado)?
Flying nonstop from IAD to LIS takes around 7 hours 20 minutes, with the route covering approximately 3,583 miles. Flights with a layover typically take 5 hours 30 minutes longer than direct options. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado)?
Business class seats are offered on the IAD to LIS route. Airlines that offer business class service on this route include:

  • British Airways
  • Air France
  • Iberia
  • United Airlines
  • TAP Portugal
  • Turkish Airlines
  • Lufthansa
  • KLM
  • Swiss International Air Lines
  • Air Canada

First class cabins are available on:

  • Lufthansa
  • Swiss International Air Lines
  • United Airlines

How much is a business class flight from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado)?
A direct, return business class ticket from Washington, DC (IAD) to Lisbon (LIS) typically costs between $6,529 - $9,237. A non-stop, one-way business class flight is usually around $4,292 - $7,051. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado) flight with Expedia?
It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Lisbon from Washington Dulles Intl. (IAD)?
If you're planning to travel to Lisbon from Washington Dulles Intl. (IAD), you can fly into Humberto Delgado (LIS) Some flights may connect through major hubs like Charlotte-Douglas Intl. (CLT), Heathrow (LHR), O'Hare Intl. (ORD) before reaching Lisbon. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado) at the last minute?
Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado) flight and hotel package?
Securing a Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado) Lisbon Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado)?
If you booked your Washington, DC (IAD-Washington Dulles Intl.) to Lisbon (LIS-Humberto Delgado) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

*Flight schedules are subject to change.

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