Huge price diff returning from LAS versus LAX

As mentioned in my trip report I was going to look at fares for flying into LAX and returning from LAS, as we like a spell in Palm Springs followed by a few days in Vegas & it saves the drive back to LAX on the last day, plus we live close to LGW. I just obtained quotes on VS web site for outbound on Fri 25th March '05 & return on Sun 3rd April '05. Results are follows:-
In & out of LAX: £4,406.60 (for "Upper Class lowest")
In to LAX out of LAS: £13,179 (again for "Upper Class lowest")
I'm amazed that returning from LAS makes the whole fare three times more expensive!! Any ideas?
In & out of LAX: £4,406.60 (for "Upper Class lowest")
In to LAX out of LAS: £13,179 (again for "Upper Class lowest")
I'm amazed that returning from LAS makes the whole fare three times more expensive!! Any ideas?