Originally Posted by
777lover
Slight correction. Per .com, you must see an agent at airport. You can’t call Res. The agent you speak with must have access to modifying the airport list. Res doesn’t have this capability as they work in the Res system
Oh a phone agent can definitely set it up such beforehand. Now if you're already checked in and the flight has gone to airport control you may have to see someone at the airport, but before that it can definitely be done over the phone.