You can go to Don Mueang International Airport (DMK) by Bus. There are 4 bus services available at the moment. Today I took A3 line to get to DMK. It is pretty easy.

A1 – BTS Mo Chit – Mochit 2

A2 – BTS Mochit – Victory Monument

A3 – Pratunam – Lumpini Park

A4 – Khaosan Road – Sanam Luang

There is also shuttle bus service to and from Suvarnabhumi International Airport (BKK). Click here to check shuttle bus service to Suvarnabhumi International Airport (BKK)

You can also now get to DMK via SRT Red Line as well. If you are going stay near by DMK, you can click here find your hotel.