1- the only other Electra operators were American and Eastern

HOU was sort of an outlier in AA’s network (iirc it was a stop on an interchange with CO/NA between Florida and California; their organic service ran from Nashville/ BNA and points to the northeast)

so let’s look at EA

I have to think the first stop was New Orleans/MSY; not everything ran through Atlanta in 1963, but since DL dominated the Mississippi River corridor (Jackson, Memphis, St. Louis, etc) I think we need to look a bit farther east

EA was a regular at Mobile/MOB and BNA; there are a handful of possibilities for the other stop both before and after BNA, so I’ll start with Birmingham:
HOU-MSY-MOB-BHM-BNA-ORD

14- I’ll stick with the LH 737 GVA-FRA, but change the 747 to a Combi (74M) to BOS; the onward flight to ABQ was a CO 72S via DEN