Express flights operated by Trans States then began flying as American Eagle. These flights then ended in 2018. In 2006 Trans States briefly operated a small hub at San Antonio, Texas flying Embraer ERJ-145s. The service was performed under the United Express banner with flights from San Antonio to Albuquerque, Colorado Springs, Kansas City, New Orleans, Oklahoma City, Omaha, and Tulsa. The call sign "Waterski" and the ICAO 3-letter identifier "LOF," which stands for 'Lodge of the Four Seasons', are from the early days when the company was operated as Resort Air and took visitors to the Lake of the Ozarks in Missouri. In 2015, the airline began a hub operation at Denver under the United Express banner and carried 3.6 million passengers for the year. In February 2020, Trans States announced their intent to gradually cease operations through 2020 and transfer their fleet of ERJ-145's to ExpressJet Airlines per an agreement with United Airlines. However, on March 17, 2020, CEO Rick Leach sent a memo to employees stating that due to the impact of the COVID-19 pandemic on aviation, the airline would cease operations on April 1, 2020, much earlier than originally expected. Compass Airlines, another regional airline owned by Trans States Holdings, also announced a cessation of operations effective April 7, 2020, leaving GoJet Airlines as the only operating airline owned by Trans States Holdings. The ERJ-145's that were transferred to ExpressJet were then transferred to CommutAir later in 2020 as ExpressJet was subsequently shut down. CommutAir is also a United Express operator. The final Trans States Airlines flight was United Express Flight 4695 from Springfield, Missouri to Denver, Colorado on April 1, 2020. St. Louis TWA Express Hub Operations in 1990 Trans States was operating 48-passenger ATR-42 and 19-passenger Fairchild Swearingen Metroliner (Metro III model) propjets in Trans World Express code share service for Trans World Airlines at this time from the TWA hub in St. Louis with nonstop flights to the following destinations: Burlington, IA Chicago, IL (Meigs Field) - one stop service via Springfield, IL Columbia, MO Des Moines, IA Joplin, MO Lincoln, NE Madison, WI Memphis, TN Moline, IL Peoria, IL Sioux City, IA Springfield, IL Springfield, MO St. Louis TWA Express Hub Operations in 1995 By 1995, Trans States had expanded its Trans World Express code sharing operations at the TWA St. Louis hub and was operating ATR-42, ATR-72, British Aerospace BAe Jetstream