When flying from Kota Kinabalu to East Timor, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
If you book a flight to East Timor from Kota Kinabalu, you will be flying from Kota Kinabalu, which is the city’s only airport. Kota Kinabalu (BKI) is located 5.8 km from the centre of Kota Kinabalu.
This is defined as Kota Kinabalu Airport (BKI) and Dili Comoro Airport (DIL). Codes like Dili Comoro Airport are often used to just call airports uniquely.