B757 Undifferentiated or Other Model
Confusion; Training / Qualification
Conflict Airborne Conflict
General None Reported / Taken
Environment - Non Weather Related; Human Factors
I was a passenger on a commercial flight. The flight was delayed about 3 hours from its original departure time. While at cruising altitude deep into the flight; I was looking out the window and saw another jet; maybe smaller; pass by on the starboard side. I estimate that the other plane was at almost exactly the same altitude. My gut feeling is that it was about 200 yards away; though it's possible is was more. I also noted that our aircraft made no evident course adjustment before or after what I witnessed.I have no professional or private aviation experience. It's my understanding that a 'near miss' must be generally within 1000 feet. But I don't know if that's a real guideline. It is my belief that this encounter at cruising altitude was at virtually the same vertical distance and under 1000 feet horizontally. I was going to ask the pilot when deplaning if possible; but the exit was mid-ship; so I didn't get the opportunity. Heck; maybe this happens all the time. It just seemed really close. I've seen other aircraft pass at cruising altitude before; but never this close.
A B757 passenger reported seeing another aircraft while at cruise. The aircraft appeared close; but neither aircraft crew took no evasive action. The passenger sensed the aircraft was about 200 yards away.