In what city does and airline with more than $1 billion in annual revenue have its headquarters?
Delta Air Lines Delta Air Lines, Inc. ("Delta"; ) is a major American airline, with its headquarters and largest hub at Hartsfield–Jackson Atlanta International Airport in Atlanta, Georgia. The airline along with its subsidiaries and regional affiliates operate over 5,400 flights daily and serve an extensive domestic and international network that includes 319 destinations in 54 countries on six continents, as of October 2016. Delta is one of the four founding members of the SkyTeam airline alliance, and operates joint ventures with Air France-KLM, Alitalia, Korean Air, China Eastern Airlines, Virgin Atlantic, and Virgin Australia. Regional service is operated under the brand name Delta Connection.
Mississippi Valley Airlines Mississippi Valley Airlines (IATA--XV), was a regional air carrier serving the Upper Midwestern region of the United States. It was founded as Gateway Aviation, and had its headquarters in La Crosse, Wisconsin. It began scheduled flight operations on July 22, 1968 between La Crosse Municipal Airport and both Chicago (O'Hare International Airport) and Milwaukee (General Mitchell International Airport). The carrier changed its name to Mississippi Valley Airways in October 1969. It became Mississippi Valley Airlines (MVA) and moved its headquarters to Quad City Airport in Moline, Illinois in January 1982. The airline merged into Air Wisconsin in 1985.