London City
Washington, D.C. Dulles Intl
2 stops
19h 30mMultiple Airlines
London Heathrow
Washington, D.C. Dulles Intl
1 stop
14h 20mTAP AIR PORTUGAL
London Heathrow
Washington, D.C. Dulles Intl
1 stop
29h 45mIcelandair
London Gatwick
Washington, D.C. Dulles Intl
1 stop
31h 40mRoyal Air Maroc
London Heathrow
Washington, D.C. Dulles Intl
Nonstop
8h 05mFinnair
London Heathrow
Washington, D.C. Dulles Intl
Nonstop
8h 05mBritish Airways
Manchester
Washington, D.C. Dulles Intl
1 stop
31h 50mWashington, D.C. Dulles Intl
Manchester
1 stop
16h 55mTAP AIR PORTUGAL
London Heathrow
Washington, D.C. Dulles Intl
1 stop
11h 05mWashington, D.C. Dulles Intl
London Heathrow
1 stop
31h 40mIcelandair
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
1 stop
13h 45mWashington, D.C. Dulles Intl
London Heathrow
1 stop
19h 25mScandinavian Airlines
London Heathrow
Washington, D.C. Dulles Intl
Nonstop
8h 05mWashington, D.C. Dulles Intl
London Heathrow
Nonstop
7h 20mFinnair
London Heathrow
Washington, D.C. Dulles Intl
Nonstop
8h 05mWashington, D.C. Dulles Intl
London Heathrow
1 stop
11h 00mBritish Airways
January
£2,126
February
£2,103
March
£2,072
April
£1,577
May
£2,074
June
£2,475
July
£2,343
August
£2,289
September
£1,958
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.