Three weeks ago ASE-BNA.....
ASE usually has three UAL flights a day to and from ORD in the winter.
(01/30/19) UA5643 the 13:06 departure to ORD is cancelled but there is a flight UA 1361 ASE-BNA ( ferry flight) at 13:06 (I am guessing) to position an aeroplane in Nashville to allow a BNA to ORD flight tomorrow (1/31/19)