On June 5, 2008 US Airways began seasonal flights to Charlotte and Philadelphia. Sacramento was the origin for the last scheduled MD-80 flight on Alaska Airlines, Flight 363 from Sacramento to Seattle on August 24, 2008. In the summer of 2010, Delta Air Lines began seasonal flights to Detroit. Continental Airlines, which later merged with United Airlines, previously had seasonal flights to Newark. Sacramento's seasonal route operated during the summer and fall. On January 6, 2013, Frontier Airlines ended service to Denver. US Airways previously flew to Las Vegas, but ended service after closing its Las Vegas hub.