One bus option might be Airport-Pattaya Bus Service. From Suvarnabhumi Airport, they currently have 10 runs each day that leave between the hours of 7:00 a.m. and 10:00 p.m. The cost is 124 Baht as of the date of this post.
Another option is Pattaya Bus — quite a few of them run, so check the site for yourself for times and starting points.
Some Public Bus Service information is available on the Suvarnabhumi Airport | New Bangkok Airport Guide. There are also links to other types of busing services.
The video below discusses using Bell Travel buses.
Pattaya101 – Bell Bus – Bangkok Airport to Pattaya
In this video I explain and show the easiest, cheapest and safest way to get from the airport to your hotel. It is the Bell Bus Service and the entire journey costs 200Bt. If you get a taxi it will cost you at least 5 times that.
Here is a to the Bell Bus Website
Oh and by the way…no I was not paid to advertise them. I’m just showing you what I consider the best way to get to Pattaya from the airport.
For everything on Thailand and especially Pattaya check out PattayaAddicts….
All music in opening and closing credit was made by me in Garageband using apple loops.