From Bangkok International Suvarnabhumi Airport: There are two convenient ways going to Lub_d

• Take the Airport Express Bus :
Airport Express provides air-conditioned bus service between Suvarnabhumi Airport and hotels in Bangkok downtown. Please Contact Airport Express Bus Counter in Level 1, near Entrance 8. Take Bus no. AE1, cost THB
150, get off at Sofitel Silom Hotel and walk to Decho road. Only five minutes you will arrive to Lub D.

• Take Bangkok Airport Public Taxi :
Public taxis can be found on Level 1 near entrances 3, 4, 7 and 8. Tell public taxi booth “Go to Lub D Hostel on Decho road, Silom”
Taxi fare: metered taxi fare plus 50 Baht airport surcharge, and expressway fees. Total cost approximate THB 400-500 (match for 3-4 people).

For more information
http://www.bangkokairportonline.com/node/14
map
how to get to Lub d