Yep, worked for me today. Saved $101.64
I live next door to O'Hare, so ran over after picking Ms. Stuffy up from school. Parked for $2.
ORD-LGA RT (3 tickets)
Online Standard Fare total: $593.64
Ticket Counter total: $492.00
Took 17 minutes from getting parking ticket on the way in, to paying parking ticket on the way out. My daughter timed me.
While I was there, I even checked prices on a couple other flights. Agent was super fast.
Mr. Stuffy will be happy to learn about this little tip.