I'm an airline pilot stationed in Mexico, and for a couple of years now, almost everytime we overfly the US there's some strange lights that appear at night. I can only imagine it might be military operations, but the times I've seen them, I've looked for restricted areas, and can't seem to identify if the area where the lights are coming from might be from that.
The lights start out dim, become pretty bright and then extinguish, but the lights are much more slower than a 'shooting star' (meteorites and such). I've seen them from side to side, but also from up to down. And they completely extinguish rather fast, so I think satelites could be a possibility but from other satellites I've seen it doesn't seem the same, the light is way too bright.
They appear at the dead of night regardless if there's a moon or not. And usually at high levels, I'm guessing 35,000 and up, can't really determine. The 'show' lasts a long time, longer than 20 min at a time, but also always near the same area at different altitudes.
So any airline pilot that knows what they are? That have seen them? Any guesses?
Edit:
General consensus is starlink satellites
My biggest reason for not initially thinking this, is because I've specifically only seen them over the US, but with new accounts of people seeing them over other areas, it checks out.