There are two airports in Bangkok: Suvarnabhumi Airport (BKK), and Don Mueang Airport (DMK). The airports are located at about 30 km from the city. Should you wish to get from one of the airports to the city, below are some links you may find useful.
From Suvarnabhumi Airport (BKK)
From Don Mueang Airport (DMK)
http://www.transitbangkok.com/to_Bangkok_airport.html#donmuang
Alternatively, you may consider using an airport pick-up service. Please click to download
Alternatively, you may consider using an airport pick-up service. Please click to download