These two would be top of my list:
Originally Posted by
diburning
Any of the gates in the ORD "Banana" concourse. The concourse is always crowded, hot, and stuffy. You actually notice it when you cross the boundary layer of air between that concourse and the rest of the terminal.
It's amazing how much hotter the "banana" is than the rest of the terminal.
No votes for the awful UAX gates at the east end of concourse B in Denver? The walk through half built shacklike hallways with no heat to get to your plane?
Honorable mention for the UA gates in MIA - pretty gross.