You used to be able to have both boarding passes on one phone, and just swipe to the next one after the first one was scanned. I read somewhere recently that each traveler would have to have their boarding pass on their own phone in the future. That won't work for us, since David doesn't have a smartphone. I've never been able to check in online for international flights anyway; not sure why others seem to be able to do it, but I always get the message that online check-in isn't available for international flights.