Due to multiple factors, expect to potentially pay more when booking in October. For low rates, March can be a great choice for travel to Gambia. Flights to Gambia from Kuala Lumpur in March are about RM 6,088 on average during March, but can be found for as low as RM 4,426.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Kuala Lumpur to Gambia as you normally would.