For a longer trip, I'll use the Aviation Fuel tab under <Airnav.com> to get a suggest route based on cost of fuel. ?Just plug in your aircraft parameters and it will suggest 10 routes according to your fuel burn, range, speed, and the cost of fuel at the various airports along the way. ?It will suggest your fuel stops by calculating the 10 least expensive combinations of stops using your aircraft's flight parameters. ?You can select either MOGAS or 100LL, or both and let the application suggest the least expensive routes.
Once I have the fuel stops selected, I'll use <skyvector.com> to plug in my route so I can get a good look at any potential airspace issues along the route. ?Then I'll plug it into my GPS for the actual flight. -Jeff Scott Los Alamos, NM