Trailerpark Atheist

Here's my question: If, as the opening crawl states, the world has basically run out of oil, then how is it possible that there are civilian flights to anywhere, let alone Hawaii? One can easily expect the military to have ready access to things like petroleum-based products like gasoline and jet fuel, as they need them to defend the country. But airlines? Come on, if we're living in a dystopian future where millions of Americans have no access to things like food, and oil is a scarce commodity, then how is it that someone could book a flight to any place on a whim? Assuming such flights were available, shouldn't you have to at least prove a need for you to go there, if not cough up an insane amount of money for a ticket?