Originally Posted by
Often1
No, there is not.
If this is domestic, you can do it as late as the gate (although you do need to be at the gate a bit early). If it is international, you can do it as late as the ticketing deadline. But, given potential glitches with all manual processes, I would not push that.
Thank you everyone for the feedback. It is a domestic flight, so seems like it should be
relatively easy to add at the airport, but I'll try to do it over the phone beforehand. Of course I was on a conference call and missed the call back from Delta haha. Another 2 hours here we go!