Back in 1972, I think.....
DL Convair 880 from IAH to ATL connecting to a DL DC-8 from ATL to DTW via a stop at DAY.
Followed by literally hundreds of flights on Delta over the years on the following aircraft:
B727-200
B737-200
B737-300
B757-200
B767-200 (including the "Spirit of Delta")
B767-300
DC-9-30
L1011
L1011-500
MD-11
MD-88
Also one flight on Southern (Martin 4-0-4) back in 1965. Later on, several flights on Hughes Airwest (DC-9-30) and then twice on Western (B727-200) as well as a whole bunch of flights on Northwest, including A320, B727-200, B757-200, B757-300, DC-9-30, DC-9-50 and DC-10-40.
Plus lots and lots and lots of flights on DL Connection as well, mainly on SkyWest-operated Metro III, EMB-120 Brasilia and CRJ equipment in the western U.S.
In addition, was invited by Delta to serve on their Business Travel Advisory Council in Los Angeles in 1994. I served a one year term on the DL BTAC (with time off for good behavior
), attending quarterly meetings in the old WA office building at LAX......and actor/comedian George Wallace was also a council member at this time.