Getting to Nha Trang from Saigon There are three ways going to Nha Trang from Saigon (distance 450km)
1. By Plane-45min (cost around usd80-usd100 rt) via Vietnam Airlines and Air Mekong http://www.airmekong.com.vn/Sites/Web/vi-Vn/Trang-Chu
2. By Sleeper Train-8 hours (RT VND800 -USD40)
3. By Sleeper Bus- 10 hours which leaves Saigon 830pm and you arrive there 645-7am (VND400k RT USD20.5 as of June 2011) via Sinh Tourist or Hanh Cafe http://www.thesinhtourist.vn/ http://so-saigon.xemzi.com/vi/venue/show/5331/Hanh-Cafe
Other Resource- http://www.nha-trang.net/eng/transport-to-get-to-nha-trang/