The contributors of Flight-Report published 13 reviews on 2 airlines on the route London - Heathrow (LHR) → Hong Kong - Chek Lap Kok (HKG). The airline with the best average rating is Cathay Pacific with 8.4/10. The average flight time is 11 hours and 59 minutes.
Airlines on this route are:
Frequent travelers recommend "Cathay Pacific First/Business Class Lounge" at LHR for comfort and meals/catering.
London has an another airport to go to Hong Kong : London - Gatwick (LGW)