Join Date: Jan 2006
Location: Half the distance to EWR than PHL.
Programs: UA, AA, B6, BA, Hilton, Hyatt, Marriott, IHG, SPG
Posts: 11,695
The AC really only needs to run when on the ground. Once you get up in the air they heat the cabin since it's well below zero outside.
I could have melted on a NW DC-9 last summer (100 air temp in MSP) that was a back up plane bakeing in the sun all day long. Once we got airborn it was fine but we were all drenched from sweat by then.