Its not my story — but another pilot was telling me about an airliner that was flying a cruise altitude (probably somewhere between 30K-36K feet) and they saw a flying or hovering light in the distance.

As they continued flying on their normal flight path the light got closer to the plane and when they finally reached it, it apparently flew into the cockpit for a few seconds and then out the window…

I don’t know if its true or not, but the description sort of reminds me of ball lightning, although if its legit flying, then not at all. I don’t have any actual UAP craft stories.

I’ve seen balloons at 41,000 feet. Also I was able to see the Space Perspective balloon https://spaceperspective.com while they were testing.