United Airlines is Aspen Sardy Field’s largest airline carrier with more daily flights than all the other airlines serving ASE combined. United's newest once-daily non-stop flights from Houston into the Roaring Fork Valley will be operated as United Express service, from January 4, 2011 through April 2, 2011. United is also scheduled to operate four daily non-stops from Chicago, three from Los Angeles, two from San Francisco, and 11 daily trips between Aspen and Denver, for a total of 21 flights daily into and out of Aspen/Snowmass for this upcoming winter season. All flights into Aspen/Snowmass will be operated by SkyWest Airlines with CRJ700 aircraft, featuring a United First cabin and United Economy Plus seating, which offers customers up to five inches of additional legroom.