Yes, I have!
I had my first UFO-related dream a couple of days ago coincidentally where I was also hiding from them aliens. I was incredibly surprised because the flying saucers had such incredible detail. I couldn't have been able to imagine it myself. I remember that in my dream, the chaos was poundering Earth. Tons of flying saucers were taking over it and at last they conquered Earth. The survivors, which included me and a couple of random people were inside some sort of airplane that could turn invisible so I got a glance at my conquerors. They were weird and slimy. Looked gross and kind of like Muk from Pokemon.
It was a frightening yet thrilling dream that's for sure.

Fun Fact: Before I fell asleep and had this dream I was actually reading a top ten about unsolved mysteries and I stopped reading when I reached the first unsolved mystery it was about a flying saucer and it's intense light thing that is commonly associated to abduction. This may have led me to my dream.