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 Shenzhen, 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 Shenzhen are generally
Korean Air,
Sichuan Airlines,
Air China,
Lufthansa,
Mahan Airlines,
China Southern Airlines,
Singapore Airlines,
Air France,
Emirates,
Asiana Airlines,
Air Astana,
Qatar Airways,
British Airways,
KLM Royal Dutch Airlines,
Egyptair,
China Eastern Airlines,
Etihad Airways
are companies.