Originally Posted by
enviroian
I wasn't aware of the subway here. Is there any rail to BKK?
indeed, the Airport Rail Link
Bangkok Airport Rail Link – Suvarnabhumi Airport (bangkokairportonline.com)
next station from your hotel would be Makkasan; you can get there by skytrain (Promphong to Asoke) change to subway (Sukhumvit to New Phetchburi), which is close to Makkasan or by taxi