BUZZ-Airlines, cruise operators gain as oil slides to 11-day low

** Shares of major US airlines and cruise operators gain premarket as crude prices slip to an 11-day low

** American Airlines AAL.O, United Airlines UAL.O, Delta Air Lines DAL.N rise more than 2% each, Southwest Airlines LUV.N ahead 1.7%

** Carnival Corp CCL.N advances 2%, Norwegian Cruise Line Holdings NCLH.N adds 1.7%, Royal Caribbean RCL.N gains 1.5%

** Oil prices eased as investors hoped for diplomatic progress on resolving the US-Iran war due to this week's UN meeting, and eyed a partial recovery in shipments from Saudi Arabia O/R

** Fuel is among the largest operating costs for airlines and cruise operators

** S&P Composite 1500 passenger airlines index .SPCOMAIR up 2.2% YTD