There is no regular Havaş service between Antalya Airport and Side
The short answer: Havaş does not run a regular service between Antalya Airport and Side. Havaş buses mainly serve central Antalya and its surroundings; the roughly 65–70 kilometres to Side fall outside that route. Side is a coastal town within the Manavgat district, and there is no direct public-transport connection from the airport.
If you want to travel by public transport
To reach Side by public transport you first have to get to central Antalya, then board a bus heading towards Manavgat, and finally change onto a Side minibus. With luggage and children this chain is both long and tiring; the total time can stretch into hours.
The taxi option
There is an official taxi rank at the airport exit. The meter starts with an opening charge and runs per kilometre; the night tariff is higher, and the total is not clear until the trip ends.
The most practical option: private transfer
If you want to reach your hotel directly without changing vehicles, a private transfer is the most comfortable method. With Duru VIP Transfer the fare is confirmed at booking and does not change en route; the driver meets you at the terminal exit holding a name sign, your flight is tracked if it is delayed, and you are taken to your drop-off point within Side.
Note on arriving in Side
Vehicle access to Side's old-town area is restricted; your private-transfer driver drops you at the nearest possible point, and the large hotels are generally around the main road. You can set up your transfer plan here.