In 2018 American ordered 15 CRJ-900 for PSA Airlines to add to its fleet 54 CRJ-900 making a total of 69 by 2020 and an additional 4 came in 2022 from SAS. PSA began adding more seats to its CRJ-900s.The retrofit project will be completed in Dayton, Ohio. PSA will pull two lines of CRJ 900 NextGen aircraft out of service at a time between mid-August and November 2022 to complete the modification and one line of CRJ-900 Atmosphere aircraft between March and June 2023.The new configuration will have 80 seats instead of 76. However 35 of the aircraft will have one seat blocked. in October 2023 PSA added 3 ex MESA CRJ900 to the fleet
