London City
Washington, D.C. Dulles Intl
2 stops
34h 25mMultiple Airlines
London Heathrow
Washington, D.C. Dulles Intl
1 stop
14h 15mTAP AIR PORTUGAL
London Heathrow
Baltimore/Washington
1 stop
27h 00mIcelandair
London Gatwick
Washington, D.C. Dulles Intl
1 stop
31h 40mRoyal Air Maroc
London Heathrow
Washington, D.C. Dulles Intl
Nonstop
8h 00mFinnair
London Heathrow
Washington, D.C. Dulles Intl
Nonstop
8h 05mLufthansa
London Gatwick
Washington, D.C. Dulles Intl
1 stop
14h 10mWashington, D.C. Dulles Intl
London Gatwick
1 stop
31h 30mIcelandair
London Heathrow
Washington, D.C. Dulles Intl
1 stop
14h 20mWashington, D.C. Dulles Intl
London Heathrow
1 stop
11h 25mTAP AIR PORTUGAL
London Gatwick
Washington, D.C. Dulles Intl
1 stop
31h 40mWashington, D.C. Dulles Intl
London Gatwick
1 stop
13h 20mRoyal Air Maroc
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
Nonstop
8h 00mWashington, D.C. Dulles Intl
London Heathrow
Nonstop
7h 20mMultiple Airlines
London Heathrow
Washington, D.C. Dulles Intl
1 stop
24h 05mWashington, D.C. Dulles Intl
London Heathrow
Nonstop
7h 15mAustrian Airlines
January
£1,941
February
£1,554
March
£1,766
April
£1,460
May
£1,895
June
£2,439
July
£2,329
August
£2,161
September
£2,081
October
£2,198
November
£2,099
December
£1,699
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.