The contributors of Flight-Report published 9 reviews on 2 airlines on the route Washington - Washington Dulles (IAD) → London - Heathrow (LHR). The airline with the best average rating is British Airways with 7.3/10. The average flight time is 7 hours and 7 minutes.
Airlines on this route are:
Frequent travelers recommend "British Airways Galleries Lounge" at IAD for services and entertainment/wifi.