It's pretty easy (and inexpensive) to get a transit visa if you want to leave the airport in LAD [needs to be done in advance and may take a few weeks to get done, but totally doable. up to 72 hrs I think to transit]. Otherwise if you're just connecting without leaving the airport - no visa is needed.
Afrijet (full name Afrijet Business Service, not to be confused with Nigerian Afrijet that no longer exists) seems to be operating old-ish ATR-42 and ATR-72 and it seems they may not be an IATA member.
If I had to choose between the two, I'd choose DY over Afrijet.
P.S. You can always fly TP TMS-ACC and then connect on to another airline.
Also, with the new award structure, ACC-TMS is only 8K UA miles + a small amount in taxes.
Last edited by Palal; Nov 20, 2017 at 12:28 pm