#2
By asking whether he's checked in at the airport, do you mean he's not likely to check-in online?
With the confirmation number, you can go to web check-in and it will tell you whether he has checked in or not.
This won't work if he's the check-in-online-type though.
Otherwise there's probably no easy/ethical way of finding out.
With the confirmation number, you can go to web check-in and it will tell you whether he has checked in or not.
This won't work if he's the check-in-online-type though.
Otherwise there's probably no easy/ethical way of finding out.
#3
Depends on the airline. UA lets you checkin with your confirmation/eticket number and your last name. You can start a dummy checkin process, and I believe it will say whether or not you're already checked in.