In 2015, it was announced that Republic Airways Holdings would begin to merge existing subsidiaries Shuttle America and Republic Airlines, with the merger completed by January 31, 2017. As 2015 ended, subsidiary Shuttle America began to transfer aircraft, flight attendants, and pilots over to the Republic Airways certificate. As part of the merger process, Republic Airways Holdings also announced that it would be seeking a single aircraft type, and began to phase out the E-145 aircraft from the Shuttle Certificate with the final flight took place on September 30, 2016. Additionally, Republic Airways Holdings also announced it would begin to phase out the Q-400 flying on the Republic Airlines certificate, with the final Q-400 flight took place on March 31, 2016.