Countries are man made and God does not endorse such divisions. So foreign travel is irrelevant in Astrology. God considers the whole earth as one and if at all it is possible Astrology can only give one chances of long distance travels which could happen even if you travel from Chennai to New Delhi. In the olden days crossing a river or a sea and living there was called “Stay in a distant land”.
Do read my articles on “Definitions in Astrology” on my blog http://www.navagrahastro.blogspot.in/
Perhaps Navneet Ji can answer your questions in a different perspective.
TMR