My girlfriend from Chile will be coming to USA in end of this year, and I want to take care of the ticket myself, by buying from Delta, for example (with or without using frequent flier points).
What do I need to purchase her ticket here from Santiago to Atlanta (round trip)? Do I simply specify all her information (name, passport number... etc) on traveler information section during the purchase? Or do I need to do something more specific?
Once she prints the boarding passes, would she have any problem using them because I bought it and not she?
I bought tickets for my family members that live in USA before, but I am not sure how would it work on international level.