If I'm driving by anyway, I'm happy to save a buck or two on a fill-up. But let's not go crazy with this, scribbling notes and setting up spreadsheets. It's the same with FBOs and fuel prices. For sure, you can save a bundle by planning a long trip using AirNav or one of the other price-tracking services. If you're looking for nothing more than a clean tankful of 100LL or jet-A, why not pick airports that might save a dollar or more per gallon? But even if you're only passing through, it pays to consider some of the other elements that go into the price of fuel, and what some of the slightly more expensive airports have to offer.