I’ve started leaving a blanket in my car so if I have a red eye I’m prepared, but I left it at home since my upgrade had cleared. That meant the plane was super freezing.
If you aren’t in first class now-a-days your odds of having access to a blanket on the plane is getting lower and lower. US Airways will charge you $7 for one, but many airlines have just cut them completely. Better buy in the airport if you didn’t BYO.