I saw this movie when I was a little kid so I don’t know a lot of details. The movie would have to be from the mid 60’s or very early 70’s. There were people at a old building like a hotel that was attacked by flying demons from the mountains. I know that isn’t much to go on but I was just a little kid and know it scared me a lot. It does seem like it was in color.
I found ABC’s The Wide World of Mystery (Thriller in the UK) that had an episode called Demon, Demon that I thought might be it but there isn’t any footage available to view.