JAFVA173:
Time Stamp: Nov. 30, 2014, 2:09 a.m.
Departure:
(KLGB) Long Beach /Daugherty Field/ Airport
Destination:
(KSLC) Salt Lake City International Airport
Flight Time: 0:00:00
Aircraft Flown: CRJ7
Speed: 362KTAS
Altitude: FL310
Route:
Notes: I went as slow as I thought was reasonable, cruising at 250KIAS. 362KTAS would have been less than 220KIAS. My guess is that the filed speeds you are finding are distance / time rather than cruise speed. Any delays, e.g. holding, would add to the time and push the average speed down.