As I'm planning on doing this while the others go look at plane graveyards.. any thoughts on whether to prepurchase or just turn up at the airport?
Decker,
At the moment (with HP) it's around $170 + taxes to return the same day. Not sure what they'd offer at LAS but the last (and only) time I've turned up to buy on the day at the airport with HP was from SJC - LAS.
They wanted nearly $400 to travel (returning in 2 days time) - but did offer an upgrade to first for $500 all-in (i think - from memory)] if I wanted it.
Personally, I'd book in advance, but that's purely based on that one experience.