£264 Cheap Flights from Lisbon (LIS) to Washington (IAD)

View £264 flight on Mon, 28 Sept 2026Opens in a new window

Flight 1

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

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

Prices were available within the past 7 days and start at £264 for one-way flights and £480 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Iberia
Fri, 15 Jan - Sun, 17 Jan
LIS
Lisbon
IAD
Washington
£480 Return, found 21 hours ago
£480
Return
found 21 hours ago
Select Iberia flight, departing Fri, 15 Jan from Lisbon to Washington, returning Sun, 17 Jan, priced at £480 found 21 hours ago
British Airways
Fri, 15 Jan - Sun, 17 Jan
LIS
Lisbon
IAD
Washington
£499 Return, found 21 hours ago
£499
Return
found 21 hours ago
Select British Airways flight, departing Fri, 15 Jan from Lisbon to Washington, returning Sun, 17 Jan, priced at £499 found 21 hours ago
Lufthansa
Sat, 13 Jun - Mon, 15 Jun
LIS
Lisbon
IAD
Washington
£519 Return, found 1 day ago
£519
Return
found 1 day ago
Select Lufthansa flight, departing Sat, 13 Jun from Lisbon to Washington, returning Mon, 15 Jun, priced at £519 found 1 day ago
Royal Air Maroc
Thu, 29 Oct - Wed, 4 Nov
LIS
Lisbon
IAD
Washington
£522 Return, found 3 days ago
£522
Return
found 3 days ago
Select Royal Air Maroc flight, departing Thu, 29 Oct from Lisbon to Washington, returning Wed, 4 Nov, priced at £522 found 3 days ago
Swiss International Air Lines
Fri, 15 Jan - Sun, 17 Jan
LIS
Lisbon
IAD
Washington
£525 Return, found 21 hours ago
£525
Return
found 21 hours ago
Select Swiss International Air Lines flight, departing Fri, 15 Jan from Lisbon to Washington, returning Sun, 17 Jan, priced at £525 found 21 hours ago
Air France
Fri, 15 Jan - Sun, 17 Jan
LIS
Lisbon
IAD
Washington
£528 Return, found 21 hours ago
£528
Return
found 21 hours ago
Select Air France flight, departing Fri, 15 Jan from Lisbon to Washington, returning Sun, 17 Jan, priced at £528 found 21 hours ago
KLM
Tue, 2 Jun - Wed, 10 Jun
LIS
Lisbon
IAD
Washington
£531 Return, found 6 days ago
£531
Return
found 6 days ago
Select KLM flight, departing Tue, 2 Jun from Lisbon to Washington, returning Wed, 10 Jun, priced at £531 found 6 days ago
Iberia
Tue, 2 Jun - Wed, 10 Jun
LIS
Lisbon
IAD
Washington
£534 Return, found 6 days ago
£534
Return
found 6 days ago
Select Iberia flight, departing Tue, 2 Jun from Lisbon to Washington, returning Wed, 10 Jun, priced at £534 found 6 days ago
United
Tue, 26 May - Sat, 29 Aug
LIS
Lisbon
IAD
Washington
£538 Return, found 4 days ago
£538
Return
found 4 days ago
Select United flight, departing Tue, 26 May from Lisbon to Washington, returning Sat, 29 Aug, priced at £538 found 4 days ago
Lufthansa
Sun, 6 Sept - Sun, 13 Sept
LIS
Lisbon
IAD
Washington
£540 Return, found 1 day ago
£540
Return
found 1 day ago
Select Lufthansa flight, departing Sun, 6 Sept from Lisbon to Washington, returning Sun, 13 Sept, priced at £540 found 1 day ago

Alternative airports near Washington

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

Select flight to Washington Dulles Intl. IAD. Cheapest option available. Average driving time to city centre is 36 minutes. Flights from £538
IAD
Washington Dulles Intl.
Cheapest
Average driving time to city centre36 min
Flights from £538

Frequently asked questions

How much does a flight from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) cost?
One-way flights typically cost between £678 and £2,866 and return flights often range between £567 and £4,459. 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 Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
September is typically the cheapest month to fly from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.), with average return fares of approximately £481. This is about 12% lower than the average price throughout the year. September often sees lower prices as the peak summer travel season ends and demand decreases. Other cheap months to fly from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) include March and April.
Which airlines fly direct from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
Enter LIS to IAD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
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-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) will differ from traveller to traveller. If you like to fly early, UA offers early morning flights. If price is the most important factor, B6 typically offers the lowest fares. TP offers the most daily flights from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.), which is brilliant 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.)?
When looking for the best time to fly from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.), it's a good idea to consider both price and popularity. Based on booking data from the past year, September and April tend to be the cheapest months, with average prices around £481. However, January and March are the most popular months for this route, meaning you'll find plenty of flight options and schedules to choose from. While there isn't a single month that is both cheapest and most popular, if you prioritise value, aiming for September or April could save you money, while January or March will offer the most flexibility in terms of flight times.
How many flights per day from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
There are approximately 3 nonstop flights per day from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.). For even more choice, look at flights that include layovers, as there are around 49 connecting flights per day. Some common connection points include Heathrow (LHR), Adolfo Suarez Madrid-Barajas (MAD), and Unknown (DUB).
What is the earliest flight from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) typically departs around 5:00 AM local time. This service is operated by KLM and Air France. This is a seasonal service active in March, May, and June. An early departure like this can help you maximize your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
You'll find the most flights from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.) on a Sunday, with around 57 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include TP, BA, and IB. Flight options are notably more plentiful on Sundays compared to other days of the week.
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 morning, between 9am and 12pm. About 26% of passengers prefer this time window. Many major carriers, including United Airlines and TAP Air Portugal, offer flights during this window. This timing works well because it allows you to start your journey relatively early and arrive in Washington, DC with plenty of time to settle in.
How long does it take to fly from Lisbon (LIS-Humberto Delgado) to Washington, DC (IAD-Washington Dulles Intl.)?
A nonstop flight from LIS to IAD typically takes around 8 hours 30 minutes, covering approximately 3,583 miles. Connecting flights on this route usually add 5 hours 50 minutes to your travel time. 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.)?
Select the "Business class" and "First class" filters when looking for LIS to IAD flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
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)?
When traveling from Humberto Delgado (LIS) to Washington, you can fly into Washington Dulles Intl. (IAD) and Ronald Reagan Washington National (DCA). Some flights may connect through major hubs like Adolfo Suarez Madrid-Barajas (MAD), Heathrow (LHR), Philadelphia Intl. (PHL) 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.) flight and hotel package 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, Austrian Airlines, British Airways, Brussels Airlines, Finnair, Iberia, KLM, Lufthansa, Royal Air Maroc, Swiss International Air Lines, TAP Portugal, Turkish Airlines, Virgin Atlantic
Return price
£479
Distance
5732 km
Average flight time
3 hours 18 mins

Book with confidence

Compare flights from Lisbon to Washington easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Lisbon to Washington. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Washington Dulles Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Humberto Delgado to Washington Dulles Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Humberto Delgado (LIS) to Washington Dulles Intl. (IAD)

The easiest way to view the best deals on flights from Lisbon to Washington today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Humberto Delgado to Washington Dulles Intl. start at just £480 and range up to £570.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Lisbon and Washington
  • booking your flight during January, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Lisbon to Washington flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Humberto Delgado to Washington Dulles Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Lisbon to Washington easily and book with confidence

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