Argh! Running out of options here... by process of elimination it seems like it has to be:
Airline: United
Connecting point: either LAX or SFO
Long-haul equipment: 747; -SP if it's LAX, 747-200 if it's SFO
Short-haul equipment: 737-300
Now advertising either of those as a direct service, when you are actually backtracking quite a bit, seems sketchy as all...