This was a surprisingly excellent burger at a small hole-in-the-wall at Phoenix Sky Harbor Terminal 4 (in section A1-14)
I got the double burger with cheese, thousand island, grilled onions for $9.75 plus tax.
Devoured it as soon as I boarded my plane before it took off. I think it will take care of my hunger until I land on the other side of the country!
This is a highly recommended burger if you are passing through PHX on American Airlines!