London City
Washington, D.C. Dulles Intl
2 stops
43h 30mMultiple Airlines
London Gatwick
Baltimore/Washington
1 stop
11h 25mIcelandair
London Heathrow
Washington, D.C. Dulles Intl
1 stop
12h 20mTAP AIR PORTUGAL
London Gatwick
Washington, D.C. Dulles Intl
1 stop
31h 40mRoyal Air Maroc
London Heathrow
Washington, D.C. Dulles Intl
Nonstop
8h 05mAustrian Airlines
London Heathrow
Washington, D.C. Dulles Intl
Nonstop
8h 05mLufthansa
London Heathrow
Washington, D.C. Dulles Intl
1 stop
25h 35mWashington, D.C. Dulles Intl
London Heathrow
1 stop
14h 35mTAP AIR PORTUGAL
London Gatwick
Washington, D.C. Dulles Intl
1 stop
31h 25mWashington, D.C. Dulles Intl
London Gatwick
1 stop
13h 35mRoyal Air Maroc
London Heathrow
Washington, D.C. Dulles Intl
1 stop
11h 10mWashington, D.C. Dulles Intl
London Heathrow
1 stop
16h 05mIcelandair
London Heathrow
Washington, D.C. Dulles Intl
Nonstop
8h 00mWashington, D.C. Dulles Intl
London Heathrow
Nonstop
7h 20mFinnair
London Heathrow
Washington, D.C. Dulles Intl
1 stop
15h 00mWashington, D.C. Dulles Intl
London Heathrow
Nonstop
7h 20mBritish Airways
London Heathrow
Washington, D.C. Dulles Intl
2 stops
30h 55mWashington, D.C. Dulles Intl
London Heathrow
1 stop
16h 05mMultiple Airlines
January
£1,062
February
£1,787
March
£1,717
April
£905
May
£2,105
June
£2,284
July
£1,646
August
£1,639
September
£2,190
October
£1,982
November
£2,080
December
£1,745
Currently, April is the cheapest month in which you can book a business class flight to Washington, D.C.. Flying business class to Washington, D.C. in June will prove the most costly. There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.