I did a little research and found

Delta says the new route is part of the airlines ongoing strategy to connect top business markets to St. Louis.
Schedule:
Flight*** Depart********************************************** Arrives
6794*** St. Louis at 7 a.m.************************ * Raleigh-Durham at 10:01 a.m.
4433*** St. Louis at 5:30 p.m.******************** Raleigh-Durham at 8:30 p.m.
6794*** Raleigh-Durham at 10:20 a.m.*** St. Louis at 11:47 a.m.
4433*** Raleigh-Durham at 3:30 p.m.***** St. Louis at 4:45 p.m.
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Flights will be operated by Delta Connection carriers Comair and Pinnacle.
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The new flight is the third market Delta has added in St. Louis in recent months, with recently-announced new service to New York-LaGuardia and Washington Reagan National Airport.
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This fall, Delta will operate 41 peak-day flights at Lambert Field to 10 destinations, with nonstop service to Atlanta; Cincinnati; Washington, D.C.; Detroit; New York-LaGuardia; New York-JFK; Memphis; Minneapolis-St. Paul; Raleigh-Durham and Salt Lake City.

Delta Airlines adding more non-stop flights at Lambert-St. Louis International Airport | KMOV.com | St. Louis news, Missouri news & breaking news | KMOV.com | News for St. Louis, Missouri