@Adam Smith I might have a similar one.
2006-12-23 US0057 OAK PHX 0600 0851 Chronictraveller
Similar--it shows as diverted, but I have no recollection of being diverted. Shows the same reg, N637AW, flying US0012 PHX JFK later in the day, but much delayed--departing 1431 instead of scheduled time of 1004. As this is in the date range of Flightstats, I will say US0057 agrees with their record of the flight, too, although I didn't check on the PHX-JFK segment.
What I recall is being delayed in OAK airport for most of the morning, and most of the OAK-PHX flights being messed up that day. Unfortunately I have no confirmation (boarding pass, itinerary) that I was booked on US0057. It's a guess, but during that time period I would often fly OAK-PHX and always tried to get the first flight of the day. When I saw the diversion, I assumed I must have seen some delay at OAK and changed my flight to US0273 (which itself was delayed 3 hours leaving OAK). Now I am wondering if I was on US0057 and we didn't divert, but some data issue with BTS or the airline is misreporting the data.
Interesting. Did you look at all the details for US57 on FlightStats? There's a lot of stuff that lines up to support the diversion.
FlightStats shows an extra sector, TUS-PHX, on that flight number. The original OAK-PHX shows "arrived" at 10:18 local. At 09:55, there's an entry in the log with the flight status changing to "Redirected" (diverted). That does sometimes happen in error, or get reversed, but seems consistent with a diversion arriving at TUS at 10:18.
The extra HP57 TUS-PHX shows departed TUS at 12:51 (runway time 12:52), arrived at PHX 13:26 (runway time 13:19). The record of that segment was first created at 11:46. That's all pretty logical if it did divert to TUS.
I haven't gone through BTS so will take your word on the aircraft's movements. Assuming you're correct, HP12 PHX-JFK's delayed departure of 14:31 lines up pretty well with that OAK-TUS-PHX timeline.
If your memory is sitting around OAK that morning, that seems a good fit with the HP273, since it departed OAK at 11:31 after being scheduled for 08:50.
Maybe you had already looked all of that up and this doesn't help, but maybe there's some additional info that helps resolve it for you!