The contributors of Flight-Report published 12 reviews on 3 airlines on the route Washington - Washington Dulles (IAD) → London - Heathrow (LHR). The airline with the best average rating is Virgin Atlantic with 8.2/10. The average flight time is 8 hours and 4 minutes.
Airlines on this route are:
Frequent travelers recommend "British Airways Galleries Lounge" at IAD for services and entertainment/wifi.
Access to the airport of Washington (IAD) is rated as average; plan your trip in advance.
Washington has an another airport to go to London : Washington - Baltimore/Washington Intl Thurgood Marshall (BWI)