London City
Washington, D.C. Dulles Intl
2 stops
19h 30mMultiple Airlines
London Heathrow
Washington, D.C. Dulles Intl
1 stop
14h 05mIcelandair
London Heathrow
Washington, D.C. Dulles Intl
1 stop
14h 00mTAP AIR PORTUGAL
London Heathrow
Washington, D.C. Dulles Intl
1 stop
30h 10mRoyal Air Maroc
London Heathrow
Washington, D.C. Dulles Intl
Nonstop
8h 05mFinnair
London City
Washington, D.C. Dulles Intl
2 stops
19h 30mMultiple Airlines
London Heathrow
Washington, D.C. Dulles Intl
1 stop
17h 20mWashington, D.C. Dulles Intl
London Heathrow
1 stop
19h 35mTAP AIR PORTUGAL
London Heathrow
Washington, D.C. Dulles Intl
1 stop
26h 50mWashington, D.C. Dulles Intl
London Heathrow
1 stop
31h 40mIcelandair
London Heathrow
Washington, D.C. Dulles Intl
1 stop
12h 35mWashington, D.C. Dulles Intl
London Heathrow
1 stop
11h 25mMultiple Airlines
London Heathrow
Washington, D.C. Dulles Intl
Nonstop
8h 15mWashington, D.C. Dulles Intl
London Heathrow
Nonstop
7h 15mLufthansa
London Heathrow
Washington, D.C. Dulles Intl
Nonstop
8h 30mWashington, D.C. Dulles Intl
London Heathrow
Nonstop
7h 10mIberia
London Gatwick
Washington, D.C. Dulles Intl
1 stop
31h 40mWashington, D.C. Dulles Intl
London Gatwick
1 stop
13h 20mRoyal Air Maroc
January
£2,126
February
£2,195
March
£2,072
April
£1,577
May
£2,074
June
£2,475
July
£2,343
August
£2,297
September
£2,065
October
£2,069
November
£1,788
December
£1,856
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.