We hope it wasn't a big bet, because your friend is correct. As with on his latest visit, when President Barack Obama visited Las Vegas back on May 26, 2009, it was McCarran International Airport that he flew into. That night he spoke at Caesars Colosseum as part of a fundraiser for Sen. Harry Reid. What may have confused you is that the following day, he did pay a visit to Nellis Airport Base before flying back to the capital out of McCarran.
Again, just as with last week's overnight presidential visit, the FAA imposed air restrictions for all Las Vegas-area air space during the entire visit, with only commercial airlines, law enforcement aircraft and medical helicopters allowed to operate within a 10- or 12-mile radius of McCarran International Airport and restrictions imposed on flights into and out of North Las Vegas and Henderson Executive Aiports.