Arriving at Don Muang Airport in Bangkok and need to go to Khao San or Silom? Then have a look at "LimoBus" service at Don Muang Airport for comfortable transfer from 9:30 in the morning until 1:00 at night.
For more information see
LimoBus Service Don Muang Airport. There is a lot of information on their web-site ... maybe I did overlook WHERE you can find them on Don Muang Airport. But they have a counter directly after the exit gate for domestic arrivals. After testing their website I would forget about making a reservation via internet ... just walk-in. There are buses every 30min.
