Airport parking facilities are located in every airport. Some are small and some a very big. The size of the airport parking facility will depend on the size airport and the amount of persons using that airport on a daily basis. Most airports started out small and they gradually expanded in larger airports and so the original car parking facility that was there is no longer sufficient. More car parking facilities will then be created but sometimes space is limited and so in the end there still isn’t enough parking space for everyone provided by the heathrow airport parking. There are always private car parks close by though as land owners know of the need for space and they can capitalize on it. They will set up car parking facilities and they will charge very reasonable rates for you to park your car there and you can then rest assured that it will be safe. Parking charges will usually come by the hour but you should be able to get them for days or weeks depending on how long you will be leaving your car for. You can always check on the parking facilities close to and inside the airport that you will be using before you go there.