I have done some further investigation on flights to Vegas for November. Fly out 14th, back 20th.
There are some decent US Airways flights kicking around the £360 mark, indirect via various US cities including Charlotte which would be a good transfer airport. Only real issue with the US Airways flights are that they get into Vegas rather late on the Saturday, I think the earliest arrival would be 19.42. Whilst I appreciate we will be up for very little after a long day flying, it would still be nice to at least get to Vegas mid to late afternoon, freshen up and head out for a while until we cave in and hit the bed. I know in Albuquerque last August, we did our best ever effort on arrival day and I was still awake, reading and watching TV (after a cracking meal at Texas Roadhouse) at around 10.30pm-11.00pm. Interestingly, I still woke up at 5.30am the next day, which would suit probably better in Vegas than Albuquerque on a Sunday morning to be honest.....
Another good one is with Delta and Northwest. Flight times are 09.55 from LHR, arrive Vegas at 16.26 connecting in Detroit (with a touch and go connection time of 75mins which we managed in Houston last year comfortably). Then coming home, it leaves Vegas at 14.15 connects in Minneapolis/St Paul (2hr 5mins) and arrives back in LHR 12.05pm+1. Price for this flight is £404, so slightly more than the US Airways but far better times. Arriving in Vegas at 16.26 would suit me perfectly.
Direct with BA is £519, but thats an 18.30 arrival time if memory serves me correctly. Let me go and laugh at Virgin prices now......