Korrol - Most flights you go on will be "trip only" fuel unless there is a compelling reason to carry more, such as a large price advantage to carry round trip fuel. But you can only do that if your payload permits. In most cases, "Trip Only" or "Minimum Fuel" means the following: Enough to start engines and taxi, to take-off, climb and descend to your destination. Then have sufficient to make an approach, a go-around and divert to your alternate and then hold for 30 minutes, make another approach and then land. Then on the top of that, you carry a spare five per cent of trip fuel in case of unforeseen circumstances. When an aircraft is making repeated approaches, it normally means that they still have well above the minimum fuel required to divert and then hold for 30 minutes.