Endeavor Air is a regional airline in the United States headquartered at the Minneapolis–Saint Paul International Airport in Minneapolis, Minnesota.

In 2012, Pinnacle's parent company filed for Chapter 11 reorganization, then emerged as a wholly owned subsidiary of Delta Air Lines.

[4] Its corporate headquarters are located in Delta Air Lines Building C, on the property of Minneapolis–Saint Paul International Airport.

[9] Republic was the dominant carrier in Memphis but, in keeping with the hub-and-spoke concept, wanted to add more smaller cities and free up its larger DC-9 jets to serve longer stage-length routes.

In order to consolidate the many Airlink systems operated at that time, Express I ceased flying from Minneapolis-St. Paul, and instead concentrated on the Memphis hub.

In August 1997, Express I moved its corporate headquarters to Memphis, allowing all the various departments to function from its main base of operations.

Express I further expanded with the development of three additional Maintenance, Repair, Overhaul (MRO) facilities related to CRJ operations.

There were two additional CRJ maintenance sites located in Indiana at South Bend and Fort Wayne, but both were closed after the bankruptcy.

[13] On May 1, 2013, Pinnacle Airlines Corporation emerged from Chapter 11 reorganization as a wholly owned subsidiary of Delta Air Lines.

[2] After restructuring, the airline was renamed to Endeavor Air,[4] its headquarters were moved to Minneapolis, Minnesota,[14] and agreements with Delta were made to operate 76-seat and 50-seat regional jets.

[17] On September 27, 2018, former Pinnacle Airlines CEO Philip Trenary was shot dead in Memphis, Tennessee, in an apparent drive-by shooting.

Endeavor flight attendants alleged that many of them struggle to make ends meet while Delta paid $1.4 billion profit-sharing bonuses to their mainline employees.

In the letter, Endeavor flight attendants allege that many of them are on public assistance and don't feel like a valuable part of Delta.