Cheap flights from Washington to London (IAD-LON) - From $1037

Good to Know: Cheapest and Fastest IAD - LON Flights

Useful information for finding best airline tickets from Washington Dulles International to London All Airport on your next trip.

Cheapest Round Trip Flight

$1037

TAP - Air Portugal • 1 stop • 20h

Aug 18 – Aug 25

The cheapest round trip flight from Washington to London (IAD-LON-IAD) is currently $1037

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Cheapest Direct Flight

$1055

KLM Airlines • nonstop • 15h 35m

Aug 18

The cheapest nonstop flight from Washington to London (IAD-LON) is currently $1055

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Fastest Flight

12h

The fastest nonstop flight from Washington to London (IAD-LON) takes 12h

Top Airlines Flying from Washington to London

Air France

Virgin Atlantic (VS)

Virgin Atlantic

TAP Air Portugal Airline (TP)

TAP - Air Portugal

United Airlines, UA

United Airlines

Lufthansa Airline (LH)

Lufthansa Airlines

American Airlines, AA

American Airlines

Air Canada

Iberia Airlines

ITA Airways

Latest Flight Deals from Washington (IAD) to London (LON)

Compare and book low fare round-trip air tickets from Washington to London. Ideal for travelers with confirmed return itineraries.

Aug 18 - Aug 25, Economy

Washington → London

20h

10:35 PM - 3:35 PM • 1 stop

Washington → London

77h 35m

9:15 PM - 3:10 PM • 2 stops

$1037

TAP - Air Portugal

Aug 18 - Aug 25, Economy

Washington → London

15h 35m

5:40 PM - 9:30 AM • 1 stop

Washington → London

21h 40m

5:55 PM - 8:55 PM • nonstop

$1055

KLM Airlines

Aug 18 - Aug 25, Economy

Washington → London

15h 35m

8:25 PM - 1:35 PM • 1 stop

Washington → London

21h 40m

5:05 PM - 8:20 PM • nonstop

$1106

Finnair

Aug 18 - Aug 25, Economy

Washington → London

25h 15m

10:35 PM - 6:50 PM • 1 stop

Washington → London

17h 35m

9:50 AM - 3:45 PM • 1 stop

$1112

TAP - Air Portugal

Aug 18 - Aug 25, Economy

Washington → London

12h 5m

10:15 PM - 10:40 AM • nonstop

Washington → London

28h 20m

7:25 AM - 7:25 PM • 1 stop

$1143

United Airlines

Aug 18 - Aug 25, Economy

Washington → London

15h 35m

6:30 PM - 6:55 AM • nonstop

Washington → London

21h 40m

12:15 PM - 3:30 PM • nonstop

$1276

Lufthansa Airlines

Looking for the fastest way to London? These direct flight options from IAD to LON offer both convenience and value—no layovers, just straight to your destination.

Aug 18 - Aug 25, Economy

Washington → London

15h 35m

10:55 PM - 11:20 AM • nonstop

Washington → London

21h 40m

5:55 PM - 8:55 PM • nonstop

$1055

KLM Airlines

Aug 18 - Aug 25, Economy

Washington → London

15h 35m

6:30 PM - 6:55 AM • nonstop

Washington → London

21h 40m

12:15 PM - 3:30 PM • nonstop

$1276

Lufthansa Airlines

Aug 18 - Aug 25, Economy

Washington → London

15h 35m

6:30 PM - 6:55 AM • nonstop

Washington → London

21h 40m

12:15 PM - 3:30 PM • nonstop

$1298

Austrian Airlines

Aug 18 - Aug 25, Economy

Washington → London

15h 35m

10:15 PM - 10:40 AM • nonstop

Washington → London

21h 40m

12:15 PM - 3:30 PM • nonstop

$1298

Austrian Airlines

Aug 18 - Aug 25, Economy

Washington → London

12h

9:30 PM - 9:50 AM • nonstop

Washington → London

13h 35m

4:25 PM - 7:40 PM • nonstop

$1375

American Airlines

Aug 18 - Aug 25, Economy

Washington → London

12h 5m

10:25 PM - 10:50 AM • nonstop

Washington → London

13h 35m

4:25 PM - 7:40 PM • nonstop

$1375

American Airlines

Fly from Washington to London with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Washington to London? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Washington to London Flights

What are the airports in Washington?

IAD,BWI,DCA

What’s the most popular airline flying from IAD to LON?

The most popular airline flying from Washington to London are

Can I fly from IAD to LON non-stop?

Yes, you can fly IAD to LON non-stop on

Which airlines fly nonstop between Washington and London?

The non-stop flights between Washington and London are .

What’s the earliest departure time from IAD to LON Airport?

The earliest flight leaves IAD at 5:40 pm and lands in LON - London All Airport

What are the airports in London?

LON

Can I make changes to my Washington to London flight tickets or cancel them on FareLeaders.com?

No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.

Can I cancel my flight tickets from IAD to LON?

Read the fare rules of the Washington to London air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.

Which airline alliances offer flights from Washington and London?

operate flights between Washington and London

How long does a flight from Washington to London take?

It takes approximately 8 hour to fly non-stop from IAD to LON, which is 3676.74 miles by air.

Which airlines provide the cheapest flights from Washington (IAD) to London (LON) ?

In the past couple of days, the cheapest tickets to LON from IAD were found on KL : USD 1055

Do I need a passport to fly between IAD and LON?

Yes

What’s the latest departure time from IAD to LON ?

The last flight leaves IAD at 10:55 pm

Hotels in London (LON)

5 hotels near London All Airport — compare rates from top booking sites.

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Go Native Mayfair

📍 10 Lees Place,Mayfair, Westminster, London W1K 6LL

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Go Native Tower Hill

📍 8 India Street, London EC3N 2HS

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Ham Yard Hotel

📍 1 Ham Yard, London W1D 7DT

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The Royal Horseguards

📍 2 Whitehall Court, London SW1A 2EJ

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Brighton Inn Boutique Guest Accommodation

📍 20 St. Georges Terrace, Brighton BN2 1JH

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Hotel Deals in New London (CT)

Red Roof Inn Mystic - New London

Red Roof Inn Mystic - New London

★★☆☆☆ Hotel 107.0 rooms

📍 707 Colman Street, Building A, New London (CT), Connecticut

Great care is taken to ensure guests experience comfort through top-notch services and amenities. Remain linked during your visit by utilizing the complimentary internet access available. The hotel o…

Check-in 03:00 PM · Check-out 12:00 PM

HomeTowne Studios Mystic - New London

HomeTowne Studios Mystic - New London

★★☆☆☆ Hotel 56.0 rooms

📍 707 Colman St, Building B, New London (CT), Connecticut

Check-in 03:00 PM · Check-out 11:00 AM

Americas Best Value Inn New London Mystic

Americas Best Value Inn New London Mystic

★★☆☆☆ Hotel 25.0 rooms

📍 380 Bayonet Street, New London (CT), Connecticut

At Americas Best Value Inn New London Mystic, exceptional service and top-notch amenities create a memorable experience for guests. Remain linked during your visit by utilizing the complimentary inte…

Check-in 02:00 PM · Check-out 11:00 AM

Regency Inn &Suites

Regency Inn &Suites

★★☆☆☆ Hotel 1.0 rooms

✓ Free WiFi ✓ Breakfast

📍 269 N Frontage Rd, New London, New London (CT), Connecticut

King-bed room with private bath -FREE WIFI-- New London-Mystic

King-bed room with private bath -FREE WIFI-- New London-Mystic

★★★★☆

Holiday Inn New London By IHG

InterContinental Hotels Group

Holiday Inn New London By IHG

★★★☆☆ Hotel 120.0 rooms

✓ Free WiFi ✓ Breakfast

📍 35 Governor Winthrop Boulevard, New London (CT), Connecticut

Holiday Inn New London By IHG offers top-notch services and amenities, ensuring guests experience utmost comfort.Share your photos and respond to emails at your convenience, thanks to the free Wi-Fi …

Check-in 03:00 PM · Check-out 12:00 PM

SpringHill Suites by Marriott Mystic Waterford

SpringHill Suites by Marriott Mystic Waterford

★★★☆☆ Hotel

📍 401 North Frontage Road, New London (CT), Connecticut

SpringHill Suites Mystic Waterford offers top-notch services and amenities, ensuring guests experience utmost comfort. Share your photos and respond to emails at your convenience, thanks to the free …

Check-in 04:00 PM · Check-out 11:00 AM

Inn at Ocean Avenue

Inn at Ocean Avenue

★★★☆☆

✓ Free WiFi ✓ Breakfast

Washington (IAD) to London (LON): Airport Information

Origin Airport	Washington Dulles International , Washington, US
Destination Airport	London All Airport, London, GB
Distance	3677 miles

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