I would reckon that airline fares are down because of the pandemic -- people don't want to fly because they are afraid of getting infected, and that's causing a "deflation" in ticket prices.
But I do agree that we are in a period of very high inflation.
The most expensive part actualy is car rentals. Car rentals in Maui are insanely expensive, if you can even get a rental. One of my friends was quoted $900/day. In other islands like Big Island and Oahu, they are cheaper ($50-80/day) if you can find a deal.