reply to post by AP-Chris
Co-incidentally enough, someone else asked a similar question, another thread, and I researched a bit into this, and have answers:
....If this is a plane, where are the other contrails from planes on same/similar flight paths. (most airliners follow the same general flight
paths in and out of airports)
Let me start by clearing up what looks like a misconception re: contrails. The "in and out of airports" is not relevant, when discussing contrails,
since they will only form above ~25,000 feet, or so. Therefore, arriving and departing airplanes, within the roughly 50-mile radius of the
departure/arrival airport, when they are too low to form contrails, won't be relevant.
I did a little looking, and knowing what I know about the airline biz, it was a snap to pull up the Honolulu Airport published departure schedule,
This page indicates that it updates each time you access it, and displays the next 24 hours' worth of departures.
As I write this, it is 1630 EST, so it's 1130 HST. On Thursday, 11 November 2010.
It has tentatively been determined that the airplane making the contrail on Monday, 8 November 2010 was USAir flight 808, HNL-PHX. That particular
flight does NOT operate on a daily repeat schedule, as you can see it does not appear on Thursday's list. I also checked the date (11th, Thursday)
on the USAir website, and the flight is not listed. It DOES operate on Friday. Normal scheduled departure time is 0955 HST.
That makes sense, as the time range needed to leave Honolulu, and be in the vicinity of LA, and Southern California, in the time frame when the
contrail was spotted, against the backdrop of the setting Sun. Roughly 1700 PST.
Looking at the departures from HNL, around that time (1000 HST) there show only inter-island flights, and two to Narita (Tokyo, Japan).
Unless we can find any other
departures to the Mainland from Honolulu (besides US808) that leave other days, at around 1000 HST, then
the only flight that would be there, to make that contrail, is US808.