Originally Posted by
nk15
This seems the most likely, but the math still doesn't quite add up. HOU-DFW-PVG is 7588 miles, and HOU-DFW-PGV is 1388 miles. But close enough.
if the agent booked IAH-LAX-PVG, it would be 7864mi, which nicely fits OP’s 7900 mi hint. Only if the agent have no clue where PGV is will he/she accepted a transit in LAX