The contributors of Flight-Report published 3 reviews on 2 airlines on the route London - Heathrow (LHR) → Tokyo - Haneda (HND). The airline with the best average rating is Japan Airlines with 8.1/10. The average flight time is 12 hours and 30 minutes.
Airlines on this route are:
Frequent travelers recommend "Cathay Pacific First/Business Class Lounge" at LHR for comfort and meals/catering.