Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Hong Kong to Kinshasa as you normally would.
Located just 17.7 km from the city centre, Kinshasa N'djili (FIH) is the airport most travelers will use when flying to Kinshasa from Hong Kong.
This is defined as Hong Kong Intl Airport (HKG) and Kinshasa N'djili Airport (FIH). Codes like Kinshasa N'djili Airport are often used to just call airports uniquely.