America operated the E170 in a two-class configuration of 6 First Class seats, and 64 economy. For Delta Air Lines, Shuttle America operated the E170 and the larger E-175 aircraft. Both of these aircraft consisted of a two-class configuration, with the E170 consisting of 9 first class seats, and 60 economy seats, while the larger E175 aircraft consists of 12 first class seats and 64 economy. These aircraft were initially operated by sister company Chautauqua Airlines, but Chautauqua was forced to transfer their 170s to Shuttle America after the pilots' union at American Airlines claimed the aircraft violated a "scope clause" regulating the size of regional aircraft operated by airlines that also operate under the American Airlines IATA airline designator code. Beginning in July, 2008, slightly larger Embraer E175 aircraft began to replace the Embraer E170 fleet in service with Delta. Towards the end of 2008, the airline achieved a major feat by being chosen to replace Delta Shuttle's MD-88 operations between New York's LaGuardia Airport and Washington Reagan National Airport on the same hourly schedule that Delta has operated with larger aircraft for decades. Beginning June, 2010, new flights by Shuttle America on behalf of Delta Shuttle served Chicago's O'Hare International Airport from New York-LaGuardia with 11 round trips per day. Callsign On July 3, 2007, Shuttle America received approval from the ICAO to change its ATC callsign from Shuttlecraft to Mercury. However, prior to the changing of the callsign to Mercury it was changed to Crossroads, but the word "cross" caused confusion between aircraft and air traffic control ("cross" being a common phrase when taxiing aircraft, i.e. "Cross runway 25L"). This change was necessary due to the similar-sounding Air Shuttle callsign used by Mesa Airlines. The IDENT code remained the same as TCF. The IATA code of the airline has remained S5 through this time. Destinations Operated as United Express Operated as Delta Connection Crew Bases Pittsburgh, Pennsylvania - Pittsburgh Intl Airport 2001-2005, USAir Express SF-340A Trenton, New Jersey - Mercer County Airport 2001-2004, USAir Express SF-340A Fairfax, VA - Dulles Intl Airport 2004-2005, United Express SF-340A Chicago, Illinois - O'Hare International Airport Columbus, Ohio - John Glenn Columbus International Airport Indianapolis, Indiana - Indianapolis International Airport Newark, New Jersey - Newark Liberty International Airport New York City-LaGuardia, New York - LaGuardia Airport Fleet As of January 2017, the Shuttle America fleet consisted of the following aircraft: Incidents