The easiest ways to reach BITEC are by taxi or by BTS Sky train.
BITEC is located within 30 minutes by car from Suvarnabhumi International Airport. There are 3 well sign-posted entrances, entrance 1 and 2 from Bangna-Trad Road and entrance 3 from Sukhumvit Road, just off the expressway.
Visitors taking the BTS should take Exit 1 from Bang Na Station. The skywalk leads directly to BITEC.
More about the venue here.