There is no such city called HANKOI. Do you mean the city Hankou in Hubei Province of China, or the city Haikou in Hainan Province, China? Waiting for your clarification…

Besides, if you want the detailed flight schedule information, the departure date is also needed.

Yes. No city calls Hankoi. But there is Hanko in Finland and in China, there is Hankou City in Hubei Province and Haikou City in Hainan Province. Maybe you have misspelled the word.