A regional airline name familiar to many travelers in smaller communities will be gone by the end of the year when Trans States Airlines stops flying.

The demise of Trans States Airlines will have no impact on passengers, as 36 of its Embraer ERJ-145 jets will be transferred to ExpressJet Airlines by the end of 2020. Both ExpressJet and Trans States Airlines operate feeder flights for United Airlines under the United Express brand.

The shut down was communicated to Trans States Airlines employees in a letter from parent Trans States Holdings CEO Rick Leach on Monday that was viewed by TPG. The move does not impact Compass Airlines or GoJet Airlines, which are also owned by Trans States Holdings.

St. Louis-based Trans States Airlines fell victim to several factors that have wreaked havoc on regional airlines over the past few years. An industry-wide pilot shortage made hiring difficult, and a move by its mainline partner United to streamline its regional providers drove the decision to close the airline, Leach told employees.

United expanded its flying agreement for the Bombardier CRJ550 with GoJet this month. The regional carrier will operate 20 more of the 50-seat jets that include a first class-cabin. It expects to have a total of 74 aircraft by 2021.

When Trans States Airlines finally stops flying, it will be the end of a nearly 40-year history that included partnerships with storied names like Trans World Airlines (TWA). Founded in 1982, Trans States Airlines flew as Trans World Express (TWE) from 1985 until TWA merged with American Airlines in 2001. The carrier also had partnerships with Delta Air Lines and USAir, later US Airways, during its 38-year run.