LIS - IAD

$366 Find Cheap Flights from Lisbon to Washington, D.C. - Compare and Save

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Everything you should know

Cheapest round-trip
$584
Typical prices: $666-$936
Icelandair
Sat 12/22Tue 1/23
LIS - IAD • 1 stop
Cheapest non-stop
$662
Typical prices: $675-$965
TAP AIR PORTUGAL
Mon 11/19Sun 11/25
LIS - IAD • Non-stop
Nonstop 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 travelers 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 layover airports
Kastrup Copenhagen (CPH)
Cheapest • Avg $500 (round-trip)
Reykjavik Keflavik Intl (KEF)
Shortest trip • 12h (one-way)
Insights
Insights
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We hope you love 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 round-trip flight deals from Lisbon to Dulles Intl

Tue, Dec 22 - Sat, Jan 23
Icelandair Logo
11:40 am - 6:30 pmLIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
11h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
7:40 pm - 12:50 pmIAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
12h 10m1 stop Reykjavik Keflavik Intl
$584Icelandair
Tue, Dec 22 - Sat, Jan 23
Icelandair Logo
11:40 am - 6:30 pmLIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
11h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
7:40 pm - 12:50 pmIAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
12h 10m1 stop Reykjavik Keflavik Intl
$590Icelandair
Tue, Dec 22 - Sat, Jan 23
Icelandair Logo
11:40 am - 6:30 pmLIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
11h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
7:40 pm - 12:50 pmIAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
12h 10m1 stop Reykjavik Keflavik Intl
$591Icelandair
Tue, Dec 22 - Wed, Jan 6
Icelandair Logo
11:40 am - 6:30 pmLIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
11h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
7:40 pm - 12:50 pmIAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
12h 10m1 stop Reykjavik Keflavik Intl
$626Icelandair
Thu, Nov 19 - Wed, Nov 25
TAP AIR PORTUGAL Logo
11:25 am - 3:15 pmLIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
8h 50mnonstop
TAP AIR PORTUGAL Logo
10:30 pm - 10:40 amIAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
7h 10mnonstop
$662TAP AIR PORTUGAL
Thu, Nov 19 - Wed, Nov 25
TAP AIR PORTUGAL Logo
11:25 am - 3:15 pmLIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
8h 50mnonstop
TAP AIR PORTUGAL Logo
10:30 pm - 10:40 amIAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
7h 10mnonstop
$664TAP AIR PORTUGAL
Thu, Nov 19 - Wed, Nov 25
TAP AIR PORTUGAL Logo
11:25 am - 3:15 pmLIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
8h 50mnonstop
TAP AIR PORTUGAL Logo
10:30 pm - 10:40 amIAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
7h 10mnonstop
$665TAP AIR PORTUGAL
Thu, Dec 3 - Sat, Dec 12
United Airlines Logo
12:20 pm - 3:40 pmLIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
8h 20mnonstop
United Airlines Logo
5:46 pm - 8:10 amIAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
9h 24m1 stop Newark
$692United Airlines
Thu, Dec 3 - Sat, Dec 12
United Airlines Logo
12:20 pm - 3:40 pmLIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
8h 20mnonstop
United Airlines Logo
10:30 pm - 10:20 amIAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
6h 50mnonstop
$692United Airlines
Sat, Nov 21 - Sat, Nov 28
United Airlines Logo
5:00 am - 8:05 pmLIS  Lisbon Humberto Delgado-IAD Washington, D.C. Dulles Intl
20h 05m1 stop Frankfurt am Main
United Airlines Logo
10:30 pm - 10:20 amIAD  Washington, D.C. Dulles Intl-LIS Lisbon Humberto Delgado
6h 50mnonstop
$727United Airlines
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 round-trip flight from Lisbon to Washington, D.C. Dulles Intl Airport?

Round-trip flights from Lisbon to Washington, D.C. Dulles Intl Airport typically range from $666 to $936. The lowest price found in the past 5 days was $584, 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’s 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 $665 round-trip.
•July ($962) and June ($897) 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.

Find deals
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 TAP AIR PORTUGAL and 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 United Airlines and 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 on the 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

$366
Beat the crowds with an average 30% drop in travelers.
The most popular month to fly with an average 17% increase in travelers.
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 round-trip 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 am and lands at 7:27 pm
    • Latest: departs at 5:15 pm and lands at 1:52 am.

    The flight takes about 8h 37m.

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

    Three cabin classes are available on flights from Lisbon to Washington, D.C. Dulles Intl Airport:

    • Economy Class
    • Premium Economy Class
    • Business Class

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

    A nonstop 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?

    Round-trip flights from Lisbon to Washington, D.C. Dulles Intl Airport range from $666 to $936, with an average of $771 over the past 12 months. Anything below $666 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 $771 route average. Book 25 weeks before departure for the lowest fares.

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

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $500 round-trip via Kastrup Copenhagen (CPH), compared to $786 for nonstop.

  • 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 $64–$100 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% of flights 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 $581, which is 12% below the typical average for this route.

  • What car rental options are available at Washington, D.C. Dulles Intl Airport (IAD)?

    Washington, D.C. Dulles Intl Airport (IAD) hosts 5 major car rental companies, with daily rates starting from around $24 for economy cars. Top options include:

    • Dollar
    • Hertz
    • Budget
    • Sixt
    • Thrifty

  • 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 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 3 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 $741 round-trip on average, while Sunday is the most expensive at $860, a difference of $119.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What 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 nonstop flights on this route include:

    • TAP AIR PORTUGAL
    • United Airlines

  • How much time can I save by choosing a different layover 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 at 12h, compared with 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 Walter E. Washington Convention Center, National Mall and Capital One Arena. 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

    Bag 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 $741, about $119 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 $665 round-trip in that month - typically $297 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 layover option averages $500 round-trip on this route - about $286 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

Complete your trip to Washington, D.C. with a hotel stay or car rental

Car rentals in Washington, D.C.
Hotels in Washington, D.C.
Vacations in Washington, D.C.