LIS - IAD

£340 Find Cheap Flights from Lisbon to Washington, D.C. – Compare and Save

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Everything you should know

Cheapest return flight
£474
Typical prices: £500-£703
Icelandair
Thu 20/12Sat 6/1
LIS - IAD • 1 stop
Cheapest direct flights
£539
Typical prices: £506-£725
TAP AIR PORTUGAL
Sat 21/4Wed 25/4
LIS - IAD • Direct
Direct flights
Every day
You can fly direct with TAP AIR PORTUGAL and United Airlines. Average duration is 8h 37m
Direct flights
+1
Direct flights
+1
Avoid delays
United Airlines
Most punctual • 74% on-time
Morning
Best time • Fewest delays
Insights
Insights
When to book
25 weeks
in advance
Our data shows that travellers who book at least 25 weeks in advance save around 32% compared to booking last minute.
Insights
Insights
When to travel
December
Cheapest • 14% price drop
June
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Kastrup Copenhagen (CPH)
Cheapest • Avg £375 (return)
Reykjavik Keflavik Intl (KEF)
Shortest trip • 12h (one-way)
Insights
Insights
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We hope you enjoy your trip to Washington, D.C. Dulles Intl Airport!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Lisbon to Dulles Intl (LIS-IAD)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Lisbon to Dulles Intl

Sun, 20 Dec - Wed, 6 Jan
Icelandair Logo
14:00 - 18:30LIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
33h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
19:40 - 12:50IAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
12h 10m1 stop Reykjavik Keflavik Intl
£474Icelandair
Sun, 13 Dec - Sat, 30 Jan
Delta Logo
05:00 - 15:40LIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
15h 40m1 stop Amsterdam Schiphol
Delta Logo
18:15 - 17:30IAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
18h 15m2 stops New York John F Kennedy Intl Paris Charles de Gaulle
£522Delta
Thu, 19 Nov - Wed, 25 Nov
Delta Logo
05:00 - 15:55LIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
15h 55m1 stop Amsterdam Schiphol
Delta Logo
12:35 - 11:20IAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
17h 45m2 stops New York John F Kennedy Intl Paris Charles de Gaulle
£525Delta
Mon, 7 Dec - Mon, 14 Dec
Delta Logo
05:00 - 15:55LIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
15h 55m1 stop Amsterdam Schiphol
Delta Logo
12:35 - 11:25IAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
17h 50m2 stops New York John F Kennedy Intl Paris Charles de Gaulle
£525Delta
Wed, 25 Nov - Wed, 2 Dec
Delta Logo
05:00 - 17:28LIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
17h 28m2 stops Amsterdam Schiphol New York John F Kennedy Intl
Delta Logo
12:35 - 11:20IAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
17h 45m2 stops New York John F Kennedy Intl Paris Charles de Gaulle
£526Delta
Tue, 24 Nov - Tue, 1 Dec
Delta Logo
05:00 - 15:45LIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
15h 45m1 stop Amsterdam Schiphol
Delta Logo
12:35 - 08:00IAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
14h 25m1 stop New York John F Kennedy Intl
£527Delta
Sun, 13 Dec - Sat, 30 Jan
Delta Logo
05:30 - 17:33LIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
17h 03m2 stops Paris Charles de Gaulle New York John F Kennedy Intl
Delta Logo
18:15 - 17:30IAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
18h 15m2 stops New York John F Kennedy Intl Paris Charles de Gaulle
£528Delta
Thu, 19 Nov - Wed, 25 Nov
Delta Logo
05:00 - 17:28LIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
17h 28m2 stops Amsterdam Schiphol New York John F Kennedy Intl
Delta Logo
12:35 - 11:20IAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
17h 45m2 stops New York John F Kennedy Intl Paris Charles de Gaulle
£528Delta
Thu, 19 Nov - Wed, 25 Nov
Delta Logo
05:00 - 17:28LIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
17h 28m2 stops Amsterdam Schiphol New York John F Kennedy Intl
Delta Logo
18:40 - 17:30IAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
17h 50m1 stop Paris Charles de Gaulle
£529Delta
Tue, 24 Nov - Tue, 1 Dec
Delta Logo
05:00 - 17:28LIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
17h 28m2 stops Amsterdam Schiphol New York John F Kennedy Intl
Delta Logo
12:35 - 08:00IAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
14h 25m1 stop New York John F Kennedy Intl
£531Delta
Booking Insights

Price, demand, and travel trends for Lisbon to Washington, D.C. Dulles Intl Airport flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

How much is a return flight from Lisbon to Washington, D.C. Dulles Intl Airport?

Return flights from Lisbon to Washington, D.C. Dulles Intl Airport typically range from £500 to £703. The lowest price found in the past 5 days was £474 on Icelandair.

What's the cheapest day of the week to fly from Lisbon to Washington, D.C. Dulles Intl Airport?

Based on deals KAYAK users found in the last 12 months, Friday is the cheapest day of the week to fly from Lisbon to Washington, D.C. Dulles Intl Airport. It's 4% cheaper than the average day, while Sunday is the most expensive, with prices 11% higher.

What is the cheapest month to fly from Lisbon to Washington, D.C. Dulles Intl Airport?

•December is the cheapest month to fly from Lisbon to Washington, D.C. Dulles Intl Airport at £499 return.
•July (£722) and June (£673) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 44% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Lisbon to Washington, D.C. Dulles Intl Airport the cheapest?

Flights from Lisbon to Washington, D.C. Dulles Intl Airport are cheapest 25 weeks before departure. Booking in this window typically costs about 32% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Expert advice

Expert advice for your flight from Lisbon to Dulles Intl

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Duncan Madden

Duncan Madden

Expert on LIS

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on IAD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or out at sea, likely en route to Antarctica or the Arctic.

Read more

Key details for Lisbon to Washington, D.C. Dulles Intl Airport flights

Low season

February

Cheapest flight

£340
Beat the crowds with an average 30% drop in traveller numbers.
The most popular month to fly with an average 17% increase in traveller numbers.
One-way flight from Lisbon to Washington, D.C. Dulles Intl Airport

When to book flights from Lisbon to Dulles Intl

Are your dates flexible? Find out the best times to travel from Lisbon to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your Lisbon to Washington, D.C. Dulles Intl Airport flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • What are the earliest and latest flights from Lisbon to Washington, D.C. Dulles Intl Airport?

    These are the earliest and latest flight times available from Lisbon to Washington, D.C. Dulles Intl Airport:

    • Earliest: departs at 10:50 and lands at 19:27
    • Latest: departs at 17:15 and lands at 01:52.

    The flight takes about 8h 37m.

  • Which cabin classes can I book on flights from Lisbon to Washington, D.C. Dulles Intl Airport?

    Only Economy class is available on flights from Lisbon to Washington, D.C. Dulles Intl Airport.

  • How long is a flight from Lisbon to Washington, D.C. Dulles Intl Airport?

    A direct flight from Lisbon to Washington, D.C. Dulles Intl Airport takes 8h 37m, covering 3,580 miles.

  • Do I need a passport to fly from Lisbon to Washington, D.C. Dulles Intl Airport?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Lisbon to Washington, D.C. Dulles Intl Airport flight?

    Return flights from Lisbon to Washington, D.C. Dulles Intl Airport range from £500 to £703, with an average of £579 over the past 12 months. Anything below £500 counts as a good deal.

  • How expensive are last-minute Lisbon to Washington, D.C. Dulles Intl Airport flights?

    Last-minute fares on this route (booked within two weeks of departure) run 21% above the £579 route average. Book 25 weeks before departure for the lowest fares.

  • How much can I save by having a stopover when flying from Lisbon to Washington, D.C. Dulles Intl Airport?

    On this route, stopover flights are cheaper than direct options on average. Stopover fares average £375 return via Kastrup Copenhagen (CPH), compared with £590 for direct.

  • What is the standard checked bag allowance on flights from Lisbon to Washington, D.C. Dulles Intl Airport?

    There is no standard. Checked bag policies vary by airline on this route. Most carriers charge £48–£75 for the first checked bag in Economy. Premium fares and elite status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from Lisbon to Washington, D.C. Dulles Intl Airport?

    The Boeing 777 family is used most often on this route, operated mainly by Lufthansa and United Airlines. Other aircraft seen on the route include Airbus A321neo variants.

  • How are flight departures from Lisbon to Washington, D.C. Dulles Intl Airport spread across the day?

    Morning is the busiest departure period on Lisbon to Washington, D.C. Dulles Intl Airport flights, with 50% leaving in that window. Afternoon departures account for 50%, Evening flights for 0%, and Night flights for 0%.

  • How are flight prices from Lisbon to Washington, D.C. Dulles Intl Airport looking right now?

    One-way fares from Lisbon to Washington, D.C. Dulles Intl Airport are currently lower than usual. Average one-way flight prices are about £364, which is 26% below the typical average for this route.

  • Which airports can I use when flying from Lisbon to Washington, D.C. Dulles Intl Airport?

    Flights from Lisbon to Washington, D.C. Dulles Intl Airport usually depart from Lisbon Humberto Delgado (LIS) and arrive at Washington, D.C. Dulles Intl (IAD).

  • What time of day has the fewest delays on flights from Lisbon to Washington, D.C. Dulles Intl Airport?

    Morning flights have the fewest delays on this route, while afternoon departures tend to have the most.

  • At what point is a flight considered delayed on the route from Lisbon to Washington, D.C. Dulles Intl Airport?

    A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Lisbon to Washington, D.C. Dulles Intl Airport route, 29% of flights were delayed in the past three months, with delays averaging 2h 20m.

  • Which airports do connecting flights from Lisbon to Washington, D.C. Dulles Intl Airport pass through?

    One-stop flights from Lisbon to Washington, D.C. Dulles Intl Airport most commonly connect through:

    • Paris Charles de Gaulle (CDG) – 37% of one-stop connections
    • Casablanca Mohamed V (CMN) – 16% of one-stop connections
    • London Heathrow (LHR) – 16% of one-stop connections
    • Amsterdam Schiphol (AMS) – 8% of one-stop connections

  • Can I save money by using flexible dates for flights from Lisbon to Washington, D.C. Dulles Intl Airport?

    Yes. Flexible dates can save you up to 14% on flights from Lisbon to Washington, D.C. Dulles Intl Airport. Friday is the cheapest departure day at £556 return on average, while Sunday is the most expensive at £645, a difference of £89.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • Which airlines fly from Lisbon to Washington, D.C. Dulles Intl Airport?

    2 airlines operate flights between Lisbon and Washington, D.C. Dulles Intl Airport. The airlines offering direct flights on this route include:

    • TAP AIR PORTUGAL
    • United Airlines

  • How much time can I save by choosing a different stopover airport from Lisbon to Washington, D.C. Dulles Intl Airport?

    Flying via Reykjavik Keflavik Intl (KEF) gives the shortest average 1-stop total travel time of 12h, compared to 13h via Paris Charles de Gaulle (CDG) and 13h 48m via Amsterdam Schiphol (AMS).

  • What is the time difference between Lisbon and Washington, D.C. Dulles Intl Airport?

    Washington, D.C. Dulles Intl Airport is 4 hours behind Lisbon (Eastern Time vs Western European Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Washington, D.C. Dulles Intl Airport?

    Some of the most popular sights in Washington, D.C. Dulles Intl Airport are Charles Sumner School Museum and Archives, Capital One Arena, and Grand Hyatt Washington. These are among the most viewed places in Washington, D.C. Dulles Intl Airport on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Lisbon to Washington, D.C. Dulles Intl Airport flights?

    Among airlines operating Lisbon to Washington, D.C. Dulles Intl Airport flights:

    • TAP AIR PORTUGAL: offers extra legroom; offers free seat selection
    • United Airlines: offers extra legroom; offers free seat selection
    • JetBlue: offers extra legroom; offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Lisbon to Washington, D.C. Dulles Intl Airport flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • TAP AIR PORTUGAL: a cabin bag and a checked bag in Economy class
    • United Airlines: a cabin bag and a checked bag in Economy class
    • Lufthansa: a cabin bag and a checked bag in Economy class

    Baggage allowance can vary by ticket type, cabin class, route, and airline, so always check the fare details before booking.

Your guide to booking Lisbon to Washington, D.C. Dulles Intl Airport flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Friday departure and avoid flying on Sunday. On this route, Friday flights average £556, about £89 less than Sunday fares (14% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 25 weeks before you fly. On this route, that window historically saves about 32% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Lisbon to Washington, D.C. Dulles Intl Airport trip for December. Fares historically average £499 return in that month – typically £223 less than the most expensive month, which is July (based on the last 12 months).
  • For the best chance of arriving on time, fly with United Airlines. Over the past three months, 74% of United Airlines flights from Lisbon to Washington, D.C. Dulles Intl Airport arrived on time, slightly above the route average of 71%. When flights on this route arrive late, they're delayed by an average of 2h 20m, so choosing an airline with strong on-time performance can make a difference if you're on a tight schedule.
  • If you have the time, taking a 1-stop flight through Kastrup Copenhagen Airport (CPH) can be cheaper than flying direct. The cheapest stopover option averages £375 return on this route – about £215 less than direct flights (based on the last 12 months).

Prefer to fly direct from Lisbon to Washington, D.C.?

 
Find which airlines fly direct from Lisbon Humberto Delgado Airport to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

Lisbon Humberto Delgado to Washington, D.C. Dulles Intl

Monday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

Tuesday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

Wednesday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

Thursday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

Friday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

Saturday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

Sunday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

See more direct flights

Direct returns

Washington, D.C. Dulles Intl to Lisbon Humberto Delgado

Monday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

Tuesday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

Wednesday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

Thursday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

Friday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

Saturday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

Sunday

TAP AIR PORTUGAL,United Airlines

TAP AIR PORTUGAL,United Airlines

See more direct flights

More options for your flight from Lisbon to Dulles Intl

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