I did peak at /r/conspiracy (pro tip: most of them are not serious and consider conspiracy theories to be fun things for them to make up and/or amplify) and yeah, Provo's airport was mentioned. Surprise, surprise, they had already pegged an airplane or two (tail numbers, owners, etc.) that left within an hour of Kirk being shot, that either had their transponders turned off enroute, or flew somewhere where the transponders didn't work, and then returned to the airport after just enough time to fly somebody out of state. Maybe they are college football fans who are experts in FlightTracker.
The current favored theories are A) Mossad/Israel did it or B) It's to deflect from the Epstein business. As far as helping the shooter escape, A) the old man police arrested was a diversion and B) the shooter flew out of Provo. Mormons also entered the conspiracy conversation.
So, if you heard any of those items I just mentioned coming from family members/co-workers/acquaintances, just remember, they probably got it 3rd-hand from a group of people who make up conspiracy theories for fun, just to see how far they can get them spread.