http://gotnews.com/exclusive-gotnews-com-leaked-flight-info-ebola-dallas-patient/
Thanks, that’s pretty helpful. Looks like his ticket was purchased about two weeks before he was exposed, with plans presumably being made for some period before that.
I’m not sure how this works, but I would assume his paperwork, such as a visa, would need to have been started much earlier yet. According to this site, it looks like getting a visa would likly take up to three months or more.
http://travel.state.gov/content/visas/english/general/wait-times.html