- Passengers who travel with a tour agency will proceed to the 1st floor for buses and coaches.
- other passengers who want to go to Bangkok downtown will also proceed to the 1st floor for the Airport Rail Link both the Express Line and the City Line.
- Here, the Association of Thai Travel Agents (ATTA) office, a medical centre,
- AOT offices for electricity monitoring and airport control offices are also located on the 1st floor.