Go. I've got a CDG trip in November, and I'm not hesitating at all. I was feeling the anxiety about safety and life in general for weeks now. But I never doubted air travel. This anxiety is causing not only mental, but physical setbacks in my life. I refuse to be slam dunked in some pothole on ole' highway 99. There is too much out in the world that I want to experience. And time is precious.
Go. Maybe skip London because there's plenty to do in Vienna and you'll spend less time around the airports. A good friend of mine is from Vienna and he's going in March (November is too cold for him).
Have a good time.
Linda