all airlines have something like this. it used to be called "counter to counter"; drop off and pick it up at the airport.
my story, about 1988. we had a system in Omaha with a broken power supply (it was big, say 6U, custom voltages). there was a spare in Rapid City, and downtime was charged by the hour.
no problem, took the spare in a box to the airport. they told us it was too big for counter to counter; but a ticket could be purchased and it would be put on the plane. No, problem.
"Give me a coach ticket to Omaha."
"Sorry sir, those are all sold. We do have a first class ticket available."
"In that case, OK"
The box went in the cargo hold.
