Hong Kong Express Airways have ”Fly Out For Free Sale” on September 13.
As for this sale, an return flight is free.
・The Japanese route
Tokyo(Haneda)⇔Hong Kong
Tokyo(Narita)⇔Hong Kong
Osaka(Kansai)⇔Hong Kong
Nagoya(Chubu)⇔Hong Kong
Hiroshima⇔Hong Kong
Takamatsu⇔Hong Kong
Fukuoka⇔Hong Kong
Kagoshima⇔Hong Kong
Okinawa(Ishigaki)⇔Hong Kong
Sale: Sep 13, 2016 – Sep 15, 2016 (23:59)
Travel: Sep 27, 2016 – Jul 13, 2017