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$415 Cheap Flights from Washington (IAD) to Lisbon (LIS)

View $415 flight on Mon, Sep 21, 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 $415 for one-way flights and $705 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Royal Air Maroc
Fri, Oct 30 - Sun, Nov 8
IAD
Washington
LIS
Lisbon
$705 Roundtrip, found 14 hours ago
$705
Roundtrip
found 14 hours ago
Select Royal Air Maroc flight, departing Fri, Oct 30 from Washington to Lisbon, returning Sun, Nov 8, priced at $705 found 14 hours ago
Turkish Airlines
Mon, Aug 31 - Tue, Oct 27
IAD
Washington
LIS
Lisbon
$804 Roundtrip, just found
$804
Roundtrip
just found
Select Turkish Airlines flight, departing Mon, Aug 31 from Washington to Lisbon, returning Tue, Oct 27, priced at $804 just found
Scandinavian Airlines
Mon, Nov 23 - Tue, Dec 1
IAD
Washington
LIS
Lisbon
$834 Roundtrip, found 17 hours ago
$834
Roundtrip
found 17 hours ago
Select Scandinavian Airlines flight, departing Mon, Nov 23 from Washington to Lisbon, returning Tue, Dec 1, priced at $834 found 17 hours ago
Aer Lingus
Mon, Aug 17 - Tue, Sep 1
IAD
Washington
LIS
Lisbon
$936 Roundtrip, found 3 days ago
$936
Roundtrip
found 3 days ago
Select Aer Lingus flight, departing Mon, Aug 17 from Washington to Lisbon, returning Tue, Sep 1, priced at $936 found 3 days ago
TAP Portugal
Mon, Apr 5 - Fri, Apr 16
IAD
Washington
LIS
Lisbon
$961 Roundtrip, just found
$961
Roundtrip
just found
Select TAP Portugal flight, departing Mon, Apr 5 from Washington to Lisbon, returning Fri, Apr 16, priced at $961 just found
Air Canada
Wed, Nov 4 - Wed, Nov 11
IAD
Washington
LIS
Lisbon
$992 Roundtrip, just found
$992
Roundtrip
just found
Select Air Canada flight, departing Wed, Nov 4 from Washington to Lisbon, returning Wed, Nov 11, priced at $992 just found
Lufthansa
Wed, Nov 4 - Wed, Nov 11
IAD
Washington
LIS
Lisbon
$996 Roundtrip, just found
$996
Roundtrip
just found
Select Lufthansa flight, departing Wed, Nov 4 from Washington to Lisbon, returning Wed, Nov 11, priced at $996 just found
United
Tue, Apr 20 - Tue, Apr 27
IAD
Washington
LIS
Lisbon
$999 Roundtrip, found 1 hour ago
$999
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Apr 20 from Washington to Lisbon, returning Tue, Apr 27, priced at $999 found 1 hour ago
Swiss International Air Lines
Wed, Nov 4 - Wed, Nov 11
IAD
Washington
LIS
Lisbon
$1,000 Roundtrip, just found
$1,000
Roundtrip
just found
Select Swiss International Air Lines flight, departing Wed, Nov 4 from Washington to Lisbon, returning Wed, Nov 11, priced at $1,000 just found
Finnair
Wed, Dec 2 - Wed, Dec 9
IAD
Washington
LIS
Lisbon
$1,000 Roundtrip, found 2 hours ago
$1,000
Roundtrip
found 2 hours ago
Select Finnair flight, departing Wed, Dec 2 from Washington to Lisbon, returning Wed, Dec 9, priced at $1,000 found 2 hours 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 $1,633
LIS
Humberto Delgado
Cheapest
Flights from $1,633

What you need to know for your flight from Washington Dulles Intl. to Humberto Delgado

Washington (IAD) to Lisbon (LIS) at a glance

Discover a range of airlines servicing the route from Washington Dulles International Airport (IAD) to Humberto Delgado Airport (LIS) on this international long-haul journey. You can compare choices from both full-service and budget carriers to select the itinerary that aligns with your budget, schedule, and travel aspirations as you delve into the iconic sights and neighborhoods of Lisbon. Find essential information for flights departing from Washington to Lisbon here.

  • Fastest flight duration: around 7h 15m non-stop
  • Route distance: roughly 3,600 miles (5,790 km)
  • Flights per week: around 14 flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $165–$880, depending on seasonality and how far ahead you book

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

Based on the latest traveler bookings, here are the top airlines favored for flights from Washington to Lisbon, including both non-stop and one-stop options. Popular layover spots include Mohammed V Airport (CMN) with approximately a 1-hour 30-minute layover, Heathrow Airport (LHR) with about a 2-hour layover, and Kastrup Airport (CPH) with a roughly 50-minute layover. These choices allow you to balance cost, overall travel time, and cabin class to create the ideal itinerary.

  • TAP Portugal: This full-service airline provides non-stop flights, representing around 60% of departures on this route. One-way ticket prices generally fall between $165 and $840, with a total travel duration of 7 hours and 15 minutes.
  • United: Offering both non-stop and one-stop flights, this full-service carrier accounts for about 21% of departures. One-way fares typically range from $350 to $1825, and non-stop travel time is approximately 7 hours and 15 minutes.
  • Royal Air Maroc: As a full-service airline, Royal Air Maroc provides one-stop flights, covering around 8% of departures on this route. One-way fares usually range from $300 to $1485, with an in-flight duration of 8 hours and 30 minutes, totaling about 10 hours and 45 minutes including layover.
  • JetBlue Airways: This low-cost airline offers non-stop service, making up roughly 4% of route departures. One-way fares typically vary from $545 to $985, with a complete journey time of 7 hours and 15 minutes.
  • Lufthansa: As a full-service carrier, Lufthansa facilitates non-stop flights and accounts for approximately 2% of departures on this route. Expect one-way fares in the range of $395 to $1210, maintaining a total journey time of 7 hours and 15 minutes.

Travelers flying from Washington to Lisbon have the option to enhance their experience by upgrading their flight. United provides both business class and premium economy service, while TAP Portugal and Royal Air Maroc offer business class options.

Best time to fly from Washington (IAD) to Lisbon (LIS)

The most popular months for travelers flying from Washington to Lisbon are March, April, and September, when peak temperatures in Lisbon reach up to 70.3°F in September. If you prefer quieter travel, consider February, the least busy time to visit with temperatures around 54.5°F and typically the lowest average one-way fare (around $454). Flight availability peaks in June and July, with approximately 19 flights per week, making it easier to find convenient departure times. January has the fewest flights, with approximately 8 flights per week.

  • Cheapest time to fly: February usually offers good deals with average one-way fare around $454, roughly 21% cheaper than the yearly average.
  • More budget-friendly months to fly: October and September typically offer average one-way fares of around $458.
  • Most flight options: June and July have the highest number of flights from Washington to Lisbon, with approximately 19 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January54.0°F (12.2°C)Moderately Low8$585
February54.5°F (12.5°C)Moderately Low9$454
March57.0°F (13.9°C)Moderately High14$608
April59.9°F (15.5°C)Moderately High13$575
May64.8°F (18.2°C)Average18$698
June68.2°F (20.1°C)Average19$782
July71.1°F (21.7°C)Average19$629
August72.0°F (22.2°C)Average17$565
September70.3°F (21.3°C)Moderately High16$458
October66.9°F (19.4°C)Average14$458
November59.9°F (15.5°C)Average12$514
December55.9°F (13.3°C)Moderately Low13$639

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative route from Washington (IAD) to Lisbon (LIS)

  • Washington to Lisbon (DCA-LIS): Ronald Reagan Washington National Airport (DCA) is located approximately 23 miles from Washington Dulles International Airport (IAD). One-way economy prices for this route generally fall between $190 and $835, influenced by the season and how far in advance you book. Typically, this route features one-stop flights, with common layovers at Logan International Airport (BOS) and John F. Kennedy International Airport (JFK). Major airlines operating on this route include Delta and Virgin Atlantic.

How to find the best prices for flights from Washington (IAD) to Lisbon (LIS)

Getting some of the best deals on flights from Washington to Lisbon is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually found when booking 2 to 8 weeks in advance, although most travelers tend to book at least 2 months ahead. Departures in the afternoon (12 PM to 6 PM) often offer lower prices, while evening flights (6 PM to 12 AM) are the most popular. Additionally, flying on Thursday typically provides cheaper rates, although Friday is the busiest travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find Lisbon hotel and flight deals.
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Humberto Delgado Airport from Washington Dulles International Airport

Lisbon welcomes travelers from Washington with a range of transport options based on price, convenience, and proximity. For departures, Washington Dulles International Airport is roughly a 40-minute drive (covering about 29 miles) from central Washington. Here's how to reach Lisbon efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Lisbon, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
  • Car rental: Renting a car from Humberto Delgado Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Humberto Delgado Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Humberto Delgado Airport, travelers will find Lisbon Airport Station, a metro station, just a short 0.1-mile walk away, while Oriente Bus Station, a bus station, is located about 1.8 miles from the airport and is best reached by car. Additionally, Roma-Areeiro Station, a train station, is also approximately 1.8 miles away by car.

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 $415 and cheap return flights from $705 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.

Travel information

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, JetBlue Airways, KLM, Lufthansa, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Roundtrip price
$704
Distance
3582 mi
Average flight time
12 hours 16 mins

Book with confidence

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 October. 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 $415 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.

 

Washington to Lisbon Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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