Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Kota Kinabalu to Napa Valley as you normally would.
Related info for your journey
Useful info, stats and facts about Kota Kinabalu to Napa Valley flights.
Most people fly from Kota Kinabalu (BKI) if they book a flight from Kota Kinabalu to Napa Valley. Kota Kinabalu is conveniently located just 5.8 km from Kota Kinabalu’s city centre.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Kota Kinabalu Airport to Napa County Airport flight would often be abbreviated as a BKI to APC flight.