 Apart from two heritage aircraft, the only remaining America West branding on aircraft can be found on some seat covers and bulkheads.The merged airline used America West's "CACTUS" callsign and ICAO code "AWE", but retained the US Airways name.As part of a merger between American Airlines and US Airways in February 2013, which led to American becoming the world's largest airline, the call sign and ICAO code name was later retired on April 8, 2015 when the FAA granted a single operating certificate for both US Airways and American Airlines.