Hong Kong Express Airways is holding ”Fly Out For Free” from January 10, 2017.
As for this sale, an return flight is free.
・The Japanese route
Sale period: Jan 10, 2017 – Jan 12, 2017
Travel period: Feb 1, 2017 – Nov 30, 2017
It is a sale where the round trip ticket from next month to the fall becomes real half price.
Since the outward flight will be free, sail must be reserved in round-trip.