Finding a parking slot in a UK airport can be very easy, but that doesn't mean it's always cheap. However, there are many things you can do to try and pay the least possible for a parking slot in one of the many airports in the United Kingdom. One of the best things you can do is book a parking slot as early as possible. If you already know you will be traveling somewhere in, say, eight months, look for a parking slot already because you will pay less the sooner you book it.