Leaving an airport whilst on a layover

Hi all,
I'm thinking of booking the following itinerary with VS:
LHR-JFK-DEN-SLC-LAS-LGW
With the DEN-SLC leg potentially either being a separate DL booking or going on Amtrak. Anyhow - my question is, on the way back via LAS, can I leave the airport? I'm going to try and get on an SLC-LAS flight that arrives at 9am, leaving me 7 hours or so to kill in Vegas. If I can leave the airport whilst my bags are being transferred, then excellent, I'll go for an explore. If not, then I'll pick a flight with a shorter layover as I don't fancy 7 hours standing about.
Thanks
I'm thinking of booking the following itinerary with VS:
LHR-JFK-DEN-SLC-LAS-LGW
With the DEN-SLC leg potentially either being a separate DL booking or going on Amtrak. Anyhow - my question is, on the way back via LAS, can I leave the airport? I'm going to try and get on an SLC-LAS flight that arrives at 9am, leaving me 7 hours or so to kill in Vegas. If I can leave the airport whilst my bags are being transferred, then excellent, I'll go for an explore. If not, then I'll pick a flight with a shorter layover as I don't fancy 7 hours standing about.
Thanks
