$397 Cheap Flights from Lisbon (LIS) to Washington (IAD)

View $397 flight on Wed, Dec 23, 2026Opens in a new window

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

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Cheap Flights from Lisbon to Washington (LIS-IAD)

Prices were available within the past 7 days and start at $397 for one-way flights and $642 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Fri, Apr 3 - Sun, Apr 12
LIS
Lisbon
IAD
Washington
$642 Roundtrip, found 4 days ago
$642
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Fri, Apr 3 from Lisbon to Washington, returning Sun, Apr 12, priced at $642 found 4 days ago
Royal Air Maroc
Wed, Jan 13 - Wed, Jan 13
LIS
Lisbon
IAD
Washington
$644 Roundtrip, found 5 days ago
$644
Roundtrip
found 5 days ago
Select Royal Air Maroc flight, departing Wed, Jan 13 from Lisbon to Washington, returning Wed, Jan 13, priced at $644 found 5 days ago
Swiss International Air Lines
Tue, Apr 14 - Tue, Apr 21
LIS
Lisbon
IAD
Washington
$652 Roundtrip, found 4 days ago
$652
Roundtrip
found 4 days ago
Select Swiss International Air Lines flight, departing Tue, Apr 14 from Lisbon to Washington, returning Tue, Apr 21, priced at $652 found 4 days ago
TAP Portugal
Wed, Nov 25 - Sat, Dec 5
LIS
Lisbon
IAD
Washington
$660 Roundtrip, found 3 days ago
$660
Roundtrip
found 3 days ago
Select TAP Portugal flight, departing Wed, Nov 25 from Lisbon to Washington, returning Sat, Dec 5, priced at $660 found 3 days ago
British Airways
Tue, Apr 14 - Tue, Apr 21
LIS
Lisbon
IAD
Washington
$673 Roundtrip, found 4 days ago
$673
Roundtrip
found 4 days ago
Select British Airways flight, departing Tue, Apr 14 from Lisbon to Washington, returning Tue, Apr 21, priced at $673 found 4 days ago
Brussels Airlines
Thu, Apr 30 - Thu, May 7
LIS
Lisbon
IAD
Washington
$677 Roundtrip, found 4 days ago
$677
Roundtrip
found 4 days ago
Select Brussels Airlines flight, departing Thu, Apr 30 from Lisbon to Washington, returning Thu, May 7, priced at $677 found 4 days ago
Air Canada
Sat, Nov 21 - Sat, Nov 28
LIS
Lisbon
IAD
Washington
$681 Roundtrip, found 7 hours ago
$681
Roundtrip
found 7 hours ago
Select Air Canada flight, departing Sat, Nov 21 from Lisbon to Washington, returning Sat, Nov 28, priced at $681 found 7 hours ago
Iberia
Tue, Apr 14 - Tue, Apr 21
LIS
Lisbon
IAD
Washington
$682 Roundtrip, found 4 days ago
$682
Roundtrip
found 4 days ago
Select Iberia flight, departing Tue, Apr 14 from Lisbon to Washington, returning Tue, Apr 21, priced at $682 found 4 days ago
American Airlines
Fri, May 1 - Mon, May 4
LIS
Lisbon
IAD
Washington
$684 Roundtrip, found 3 days ago
$684
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, May 1 from Lisbon to Washington, returning Mon, May 4, priced at $684 found 3 days ago
Aer Lingus
Thu, Apr 16 - Sat, Apr 25
LIS
Lisbon
IAD
Washington
$690 Roundtrip, found 2 days ago
$690
Roundtrip
found 2 days ago
Select Aer Lingus flight, departing Thu, Apr 16 from Lisbon to Washington, returning Sat, Apr 25, priced at $690 found 2 days ago

Alternative airports near Washington

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

Select flight to Ronald Reagan Washington National DCA. Closest option available. Average driving time to city center is 8 minutes. Flights from $1,667
DCA
Ronald Reagan Washington National
Closest
Average driving time to city center8 min
Flights from $1,667

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

February is typically the cheapest month to fly

From $471 - $834 per traveler.

Frequently asked questions

How much does a flight from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) cost?
You can find cheap one-way flights from $397 and cheap return flights from $642 Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) with Expedia. One-way flights usually range from $566 to $7313, and return flights typically cost between $726 and $6083. 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 Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) 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 Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
September is the cheapest month to fly from Lisbon to Washington, DC, with average return fares around $643. This is about 12% lower than the average price throughout the year, as demand typically decreases after the summer travel season. Other economical months to consider are March and April.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
Choose from 2 airlines operating direct flights from LIS to IAD:

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

What is the cheapest airline that flies from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
JetBlue Airways is one of the cheapest airlines offering nonstop flights from Humberto Delgado (LIS) to Washington Dulles Intl. (IAD), with round-trip tickets starting from around $1,469. 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 Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
To find a cheap flight from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.), 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 Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
The best airline to fly with from Lisbon (LIS) to Washington, DC (IAD) 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. TAP Portugal also offers the most daily flights from LIS to IAD, 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 Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
The best times to fly from Lisbon (LIS) to Washington, DC (IAD) are typically April and September. In April, you can expect prices around $643 for a return flight, making it a budget-friendly option. September is also popular, offering a great balance of moderate prices and pleasant weather, which enhances your travel experience. This information is based on booking data from the past year.*Prices based on flights available on Expedia in the last year.
How many flights per day from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
There are approximately 2 nonstop flights per day from Humberto Delgado (LIS) to Washington Dulles Intl. (IAD). For more options, look at flights that include layovers.
What is the earliest flight from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from Humberto Delgado Airport (LIS) to Washington Dulles International Airport (IAD) typically departs at around 5:00 AM, operated by KLM and Air France. This seasonal service is active in May, allowing you to start your day early in Washington, DC. 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 Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
The most popular departure times for flights from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) are in the late morning, from 9am to noon. About 31% of passengers prefer this time window. Many major carriers, including United and TAP Portugal, operate flights during this period. This timing is popular as it allows you to arrive in Washington, DC with a full day ahead to explore.
How long does it take to fly from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
Flying nonstop from LIS to IAD takes around 8 hours 30 minutes, with the route covering approximately 3,583 miles. Flights with a layover typically take 5 hours 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 Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
Business class is available on flights from LIS to IAD. Airlines that offer business class service on this route include:

  • British Airways
  • TAP Portugal
  • United Airlines
  • Turkish Airlines
  • Lufthansa
  • Air Canada
  • Brussels Airlines
  • Swiss International Air Lines
  • Iberia
  • Delta Air Lines

First class is available with Emirates.
How much is a business class flight from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
A direct, return business class ticket from Lisbon (LIS) to Washington, DC (IAD) typically costs between $4,108 - $10,337. A non-stop, one-way business class flight is usually around $2,932 - $3,178. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) 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 Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia?
It's easy to earn miles on a Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) 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 Washington from Humberto Delgado (LIS)?
From Humberto Delgado (LIS), you can fly into Washington Dulles Intl. (IAD) and Ronald Reagan Washington National (DCA) in Washington. Some flights may connect through major hubs like Adolfo Suarez Madrid-Barajas (MAD), Philadelphia Intl. (PHL), Heathrow (LHR) before reaching Washington. 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 Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute?
Typically, booking a last minute flight from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) 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 Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package?
Securing a Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) Fairfax County 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 Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
If you booked your Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) 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.

Travel information

Origin airport
Humberto Delgado
Destination airport
Washington Dulles Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, JetBlue Airways, KLM, Lufthansa, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$642
Distance
3582 mi
Average flight time
4 hours 43 mins

Book with confidence

Lisbon to Washington Flights

The cheapest times to fly from Lisbon to Washington

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 Lisbon to Washington are during the month of April. You can find some of the cheapest flights from Lisbon to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Lisbon to Washington

Sunday is one of the best days to book for cheap flights from Lisbon to Washington: 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 Lisbon to Washington

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 Lisbon to Washington in 2026. You can also book with separate airlines for your outbound and return journeys, from $397 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 Lisbon to Washington 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 Lisbon to Washington 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.

 

Lisbon to Washington Flights

*Flight schedules are subject to change.

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