Worth the bump due to increased frequency on IST-KWI and change to A330 on KWI-BKK from Feb 16th, 2017, making this offer even more attractive.

http://www.routesonline.com/news/38/...as-of-27aug16/

Time the flight out of IST to minimize connection time at KWI.

One way IST-BKK is about $500 USD, return is around $900 USD, a heck of a deal even without miles. However, BKK-IST one way and BKK-IST rt iwill be at least double.