Originally Posted by StuckInYYZ

I can't speak for European, but Asian flights are generally kept much warmer... those that sit near the exits tend to be shivering a lot even under two or more blankets due to the air leakage. In the before times, I kept a USB powered fan in my pack in case they set the cabin temperature higher than I would like.

But in this case, I don't think it applies. It's a US domestic flight. Likely the air conditioning unit was malfunctioning. But until the OP comes back with the other flight (and see if it is still within a recallable history) we won't know.