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 Gatwick
Washington, D.C. Dulles Intl
1 stop
11h 15mIcelandair
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
£2,126
February
£2,103
March
£2,072
April
£1,577
May
£2,074
June
£2,475
July
£2,343
August
£2,170
September
£1,952
October
£2,069
November
£1,771
December
£2,085
Currently, April is the cheapest month in which you can book a business class flight to Washington, D.C. Dulles Intl. Flying business class to Washington, D.C. Dulles Intl 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.