Hi, my wife wants to visit her family in the UK. She is currently on an H4 visa, any advise about travel documents needed or problems involved with travelling.
8. Are there any travel restrictions on H-4 visa?
No, there are no travel restrictions on H-4 visa. You may travel as many times as possible while you are on H-4 status.
from here:
http://faq.visapro.com/H4-Visa-FAQ3.asp#Q8
hth