Going to Bangkok from the Airport and going back to the Airport again has become easier, cheaper and faster thanks to the Airport Link. But of course if you have a lot of Baggage this is not a good option. the Airport link operates from 6am-12mn ONLY.
As you exit Customs just follow the signs going to the Airport Link. You have 2 Choices to the City, The City Line or the Express Line (Stops at Makkasan or Phaya Thai only.
CITY LINE:
Use the City Line if you are not in a Hurry. Usually you will need to stop at Makkasan, Ratchaprarop or Phaya Thai as these are the stations where the hotels are usually located.
the Fare for City line from Suvarnabhumi
- to Makkasan Baht 35
- to Ratchaprarop Baht 40
- to Phaya Thai Baht 45 (Travel time is just 27 Minutes)
EXPRESS LINE:
As of July 2015 the express line is not operating.
The Express line takes you directly to Phaya Thai or Makkasan.
From/to MAKKASAN it is 15 Minutes
Fare: Baht 150 Round Trip, Baht 90 Single
From/to PHAYA THAI it is 17 Minutes
Fare: Baht 150 Round Trip, Baht 90 Single