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Cheap flights from Lisbon to Washington, D.C. Dulles Intl Airport from £271

LIS — IAD
17 Oct — 24 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Lisbon to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Lisbon to Dulles Intl

Wed 23/1216:55 -
1 stop29h 20m
Thu 25/220:30 -
1 stop14h 35m
Deal found 17/9£271
Tue 22/1216:55 -
1 stop29h 20m
Mon 8/320:30 -
1 stop14h 35m
Deal found 17/9£434
Wed 23/1208:20 -
1 stop13h 00m
Thu 7/121:45 -
1 stop19h 10m
Deal found 17/9£435
Tue 22/1206:30 -
1 stop14h 50m
Sat 23/118:05 -
1 stop13h 00m
Deal found 16/9£436
Thu 8/1005:00 -
1 stop15h 35m
Sat 17/1021:45 -
1 stop19h 40m
Deal found 17/9£437
Thu 8/1005:00 -
1 stop15h 35m
Sat 17/1021:45 -
1 stop15h 05m
Deal found 16/9£437
Thu 1/1019:45 -
1 stop24h 50m
Tue 6/1018:15 -
1 stop18h 35m
Deal found 14/9£440
Tue 13/1012:15 -
1 stop12h 20m
Tue 20/1018:15 -
1 stop12h 00m
Deal found 15/9£441
Tue 6/1005:00 -
2 stops17h 33m
Thu 29/1019:40 -
1 stop15h 30m
Deal found 15/9£442
Thu 1/1005:35 -
1 stop15h 30m
Tue 6/1012:30 -
2 stops15h 20m
Deal found 14/9£442

Find flight deals from Lisbon to Dulles Intl

Round-trip from

£271

Popular in

June

Cheapest in

March

Average price

£626
Scandinavian Airlines
  • Scandinavian Airlines
  • 23/12-25/2
  • 2 total stops
  • 43h 55m total
  • Lisbon to Washington, D.C.
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Highest demand for flights based on searches. 13% potential increase in price (£72 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
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Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Lisbon to Washington, D.C. Dulles Intl Airport that are best for you.

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Route

Depart

Return

Price

Cheapest return flight

LisbonWashington, D.C.

LIS Lisbon Humberto Delgado - IAD Washington, D.C. Dulles Intl

LISIAD

Lisbon Humberto Delgado

Tue 22/12

06:30-16:20

1 stop14h 50m

Washington, D.C. Dulles Intl

Sat 23/1

18:05-12:05

1 stop13h 00m

£436

LisbonWashington, D.C.

LIS Lisbon Humberto Delgado - IAD Washington, D.C. Dulles Intl

LISIAD

Lisbon Humberto Delgado

Thu 8/10

05:00-15:35

1 stop15h 35m

Washington, D.C. Dulles Intl

Sat 17/10

18:31-17:50

2 stops18h 19m

£437

LisbonWashington, D.C.

LIS Lisbon Humberto Delgado - IAD Washington, D.C. Dulles Intl

LISIAD

Lisbon Humberto Delgado

Wed 23/12

08:20-16:20

1 stop13h 00m

Washington, D.C. Dulles Intl

Thu 7/1

21:45-21:55

1 stop19h 10m

£437

LisbonWashington, D.C.

LIS Lisbon Humberto Delgado - IAD Washington, D.C. Dulles Intl

LISIAD

Lisbon Humberto Delgado

Thu 5/11

05:00-15:45

1 stop15h 45m

Washington, D.C. Dulles Intl

Wed 18/11

18:20-17:30

2 stops18h 10m

£439

LisbonWashington, D.C.

LIS Lisbon Humberto Delgado - IAD Washington, D.C. Dulles Intl

LISIAD

Lisbon Humberto Delgado

Thu 8/10

19:45-15:35

1 stop24h 50m

Washington, D.C. Dulles Intl

Mon 19/10

18:15-17:50

1 stop18h 35m

£439

LisbonWashington, D.C.

LIS Lisbon Humberto Delgado - IAD Washington, D.C. Dulles Intl

LISIAD

Lisbon Humberto Delgado

Thu 5/11

05:00-15:45

1 stop15h 45m

Washington, D.C. Dulles Intl

Tue 17/11

18:20-15:10

2 stops15h 50m

£439

LisbonWashington, D.C.

LIS Lisbon Humberto Delgado - IAD Washington, D.C. Dulles Intl

LISIAD

Lisbon Humberto Delgado

Wed 28/10

05:00-16:55

1 stop15h 55m

Washington, D.C. Dulles Intl

Sun 1/11

17:45-10:30

1 stop11h 45m

£442

LisbonWashington, D.C.

LIS Lisbon Humberto Delgado - IAD Washington, D.C. Dulles Intl

LISIAD

Lisbon Humberto Delgado

Thu 26/11

11:25-15:15

Nonstop8h 50m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£457

LisbonWashington, D.C.

LIS Lisbon Humberto Delgado - IAD Washington, D.C. Dulles Intl

LISIAD

Lisbon Humberto Delgado

Thu 5/11

11:25-15:15

Nonstop8h 50m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£483

LisbonWashington, D.C.

LIS Lisbon Humberto Delgado - IAD Washington, D.C. Dulles Intl

LISIAD

Lisbon Humberto Delgado

Sun 1/11

05:00-18:33

2 stops17h 33m

Washington, D.C. Dulles Intl

Sun 8/11

18:32-17:30

2 stops17h 58m

£518

Flights are sorted by cheapest return flights first.

Deals found on 17/9

Showing 1-10 of 23 resultsSorted by cheapest first
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Best time to book a flight from Lisbon to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Lisbon with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from Lisbon to Washington, D.C. Dulles Intl Airport

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

Currently, March is the cheapest month in which you can book a flight from Lisbon to Washington, D.C. Dulles Intl Airport (average of £497). Flying from Lisbon to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of £745). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LIS to IAD?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Lisbon to Washington, D.C. Dulles Intl Airport as you normally would.

How much does it cost for a return flight from Lisbon to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment.

Lisbon to Washington, D.C. Dulles Intl Airport flights typically cost between £563 and £697 in December.
The cheapest return price found within the last 5 days was £271 on Scandinavian Airlines (23 Dec–13 Mar).

Related info for your journey

  • What airport do you fly from for flights from Lisbon to Washington, D.C. Dulles Intl?

    If you book a flight to Washington, D.C. Dulles Intl from Lisbon, you will be flying from Humberto Delgado, which is the city’s only airport. Lisbon Humberto Delgado (LIS) is located 4.2 mi from the center of Lisbon. There are 4 flights from Humberto Delgado to Washington, D.C. Dulles Intl per day from 0 different airlines.

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

    Airlines like Delta fly from Lisbon to Washington, D.C. Dulles Intl Airport in about 15h 35m. The time it takes to get you to your destination can typically vary by up to . There are 3580 mi between Lisbon and Washington, D.C. Dulles Intl Airport.

  • What are the most reliable airlines from Lisbon to Washington, D.C. Dulles Intl Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Lisbon to Washington, D.C. Dulles Intl Airport on time: JetBlue (73%), TAP AIR PORTUGAL (73%), airBaltic (62%).

  • Can I find deals for flights from Lisbon to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Lisbon to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Lisbon to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Lisbon to Dulles Intl.

  • Can I find deals for business class flights from Lisbon to Dulles Intl?

    Yes. Cheapflights offers flight deals from Lisbon to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Lisbon to Washington, D.C. Dulles Intl Airport?

    Currently, March is the cheapest month in which you can book a flight from Lisbon to Washington, D.C. Dulles Intl Airport (average of £497). Flying from Lisbon to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of £745). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Alexandria
Gaithersburg
Oxon Hill
Hanover
Woodbridge
Glen Burnie
Springfield
Sterling

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