Im currently sitting in the departure lounge at Manchester airport awaiting my 11am flight to New York and then on to Vegas.  Its only a 7 hour flight followed by another 6 hour flight, but the rewards are great!  I have traveled with American Airlines and Delta previously to Vegas and they are pretty much of the same thing to be honest although Delta staff always seem a little more friendly.

Take a look at these:
Airport Transfers
Marrakech Airport Transfer
Hire airport taxis from Millennium Chauffeurs