American Airlines is the sole remaining US carrier serving Venezuela and there are few other airlines flying in and out of the country as well. As the nation has fallen apart, with mass shortages, rampant crime, and inflation over 5000%, American Airlines had found their Venezuela routes extremely profitable — because there was so little air service left.
With flight crews getting robbed by bandits airlines fly crews out of the country rather than overnighting, and try to refuel elsewhere as well.