While purchasing the first ticket, you can mark the Return button, or after purchasing one-way, you can re-enter the system and purchase the return tickets by examining the reverse route sign with the reverse route sign.
When you search for flights between İstanbul and Hong Kong, all active companies and flight times on the date you entered are listed. You can find the cheapest flight tickets by sorting this list by price.
The most frequently used airline companies from İstanbul to Hong Kong are generally
Türk Hava Yolları,
Hong Kong Airlines,
Korean Air,
British Airways,
KLM Royal Dutch Airlines,
Malindo Airways,
LOT Polish Airlines,
Royal Jordanian,
Singapore Airlines,
Emirates,
China Eastern Airlines,
Lufthansa,
Air France,
Qatar Airways,
China Southern Airlines,
Asiana Airlines,
Ethiopian Airlines,
Air New Zealand,
Cathay Pacific,
Thai Airways Intl,
Miat Mongolian Airlines,
Finnair,
Sichuan Airlines
are companies.