$381 Cheap Flights from Lisbon (LIS) to Washington (IAD)

View $381 flight on Thu, May 15, 2025Opens in a new window

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

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Find available prices by choosing your travel dates.

Cheap Flights from Lisbon to Washington (LIS-IAD)

Prices were available within the past 7 days and start at $381 for one-way flights and $546 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Mon, Aug 25 - Mon, Sep 8
LIS
Lisbon
IAD
Washington
$546 Roundtrip, found 11 hours ago
$546
Roundtrip
found 11 hours ago
Select Aer Lingus flight, departing Mon, Aug 25 from Lisbon to Washington, returning Mon, Sep 8, priced at $546 found 11 hours ago
Iberia
Thu, Sep 25 - Wed, Oct 15
LIS
Lisbon
IAD
Washington
$555 Roundtrip, found 4 hours ago
$555
Roundtrip
found 4 hours ago
Select Iberia flight, departing Thu, Sep 25 from Lisbon to Washington, returning Wed, Oct 15, priced at $555 found 4 hours ago
Lufthansa
Tue, Jan 13 - Tue, Mar 17
LIS
Lisbon
IAD
Washington
$572 Roundtrip, found 2 days ago
$572
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Tue, Jan 13 from Lisbon to Washington, returning Tue, Mar 17, priced at $572 found 2 days ago
Swiss International Air Lines
Tue, Sep 23 - Wed, Oct 15
LIS
Lisbon
IAD
Washington
$578 Roundtrip, just found
$578
Roundtrip
just found
Select Swiss International Air Lines flight, departing Tue, Sep 23 from Lisbon to Washington, returning Wed, Oct 15, priced at $578 just found
Lufthansa
Fri, Nov 21 - Fri, Nov 28
LIS
Lisbon
IAD
Washington
$585 Roundtrip, found 2 days ago
$585
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Fri, Nov 21 from Lisbon to Washington, returning Fri, Nov 28, priced at $585 found 2 days ago
American Airlines
Thu, Jun 12 - Mon, Jun 16
LIS
Lisbon
IAD
Washington
$589 Roundtrip, found 12 hours ago
$589
Roundtrip
found 12 hours ago
Select American Airlines flight, departing Thu, Jun 12 from Lisbon to Washington, returning Mon, Jun 16, priced at $589 found 12 hours ago
TAP Portugal
Fri, Oct 17 - Wed, Nov 5
LIS
Lisbon
IAD
Washington
$592 Roundtrip, found 22 hours ago
$592
Roundtrip
found 22 hours ago
Select TAP Portugal flight, departing Fri, Oct 17 from Lisbon to Washington, returning Wed, Nov 5, priced at $592 found 22 hours ago
Royal Air Maroc
Tue, Oct 7 - Wed, Oct 29
LIS
Lisbon
IAD
Washington
$593 Roundtrip, found 2 days ago
$593
Roundtrip
found 2 days ago
Select Royal Air Maroc flight, departing Tue, Oct 7 from Lisbon to Washington, returning Wed, Oct 29, priced at $593 found 2 days ago
United
Tue, Jan 13 - Tue, Mar 17
LIS
Lisbon
IAD
Washington
$595 Roundtrip, found 2 days ago
$595
Roundtrip
found 2 days ago
Select United flight, departing Tue, Jan 13 from Lisbon to Washington, returning Tue, Mar 17, priced at $595 found 2 days ago
Delta
Wed, Oct 29 - Sat, Nov 15
LIS
Lisbon
IAD
Washington
$599 Roundtrip, found 3 hours ago
$599
Roundtrip
found 3 hours ago
Select Delta flight, departing Wed, Oct 29 from Lisbon to Washington, returning Sat, Nov 15, priced at $599 found 3 hours ago

Frequently asked questions

How much does a flight from Humberto Delgado Airport (LIS) to Washington Dulles Intl. Airport (IAD) cost?
You can land affordable return tickets from Humberto Delgado Airport (LIS) to Washington Dulles Intl. Airport (IAD) starting at $585. Grab your seat and start your adventure. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Lufthansa flight leaving LIS on May 18 2025 and touching down at IAD. The price was last updated on April 23 2025 and has not changed since.
What is the cheapest month to fly from LIS to IAD?
The cheapest flights from LIS to IAD are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Humberto Delgado Airport (LIS) to Washington Dulles Intl. Airport (IAD)?
Take a direct flight with TAP Portugal and journey straight from Humberto Delgado Airport (LIS) to Washington Dulles Intl. Airport (IAD).
What is the cheapest airline that flies from LIS to IAD?
With prices starting from $362 for a one-way journey from LIS to IAD, TAP Portugal is currently the cheapest carrier operating this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from LIS on June 26 2025. Prices were last updated on April 23 2025 and have not changed since.
How many flights per day from Humberto Delgado Airport (LIS) to Washington Dulles Intl. Airport (IAD)?
On average, Humberto Delgado Airport (LIS) offers 6 nonstop flights to Washington Dulles Intl. Airport (IAD) weekly. For more options, take advantage of Expedia’s filter tool to discover flights with one or two stops. Squeeze in a visit to another location or simply break up your travels.
What are the most popular departure times for flights from Humberto Delgado Airport (LIS) to Washington Dulles Intl. Airport (IAD)?
Flights between LIS and IAD are their busiest at 5 PM. If you’re after a more relaxed trip and potentially cheaper prices, choose a departure that’s outside typical rush times.
What day of the week has the most flights from LIS to IAD?
Friday offers the most flights from Humberto Delgado Airport (LIS) to Washington Dulles Intl. Airport (IAD). Consider taking off on this day and you’ll have a greater chance of finding a departure that fits your plans.
What is the earliest flight from Humberto Delgado Airport (LIS) to Washington Dulles Intl. Airport (IAD)?
Take the earliest flight at around 10:45AM UTC+0, departing from Humberto Delgado Airport (LIS). You’ll be in the air for about 8h 45m, coming in to land at Washington Dulles Intl. Airport (IAD) at approximately 2:30PM UTC-5.
How long does it take to fly from Humberto Delgado Airport (LIS) to Washington Dulles Intl. Airport (IAD)?
Typically, it takes 8 hours and 45 minutes to cover the 3,600 mi from LIS to IAD.
What is the best time to fly from Humberto Delgado Airport (LIS) to Washington Dulles Intl. Airport (IAD)?
To arrive at Washington Dulles Intl. Airport (IAD) on time, book a flight that takes off from Humberto Delgado Airport (LIS) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Washington from Humberto Delgado Airport (LIS)?
If you’re boarding a direct flight from Humberto Delgado Airport (LIS) to Washington, Washington Dulles Intl. Airport (IAD) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Humberto Delgado Airport (LIS) to Washington Dulles Intl. Airport (IAD) last-minute?
Last-minute fares from LIS to IAD are generally more expensive. To secure the best prices, start looking for flights as early as possible. That being said, if your travel plans are flexible, you may score a cheap ticket right before your journey.
Is it cheaper to book a LIS to IAD flight and hotel package?
You can save money by booking a LIS to IAD flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it’s simple to manage everything in one convenient place. Once you’ve chosen your ideal accommodations and flights, consider other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Humberto Delgado Airport (LIS) to Washington Dulles Intl. Airport (IAD)?
If you booked your LIS to IAD flight in 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 that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.
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