You are planning a vacation to Europe and are finding out all the things that are involved with a trip overseas. Not only do you need a flight but you need accommodations and a rental car and tours and food.  You begin online with your travel dates and search the flights to London to find the best deal.
Flights during the peak season cost more then the off season so you consider maybe waiting till after summer to leave. You then look into a rental can and find this it cost more and seems more complicated than renting a car the US. But to be able to get around on your own time frame is worth the cost.  You book your car from home, in advance and find that all the typical agencies are also in Europe. Dollar, Avis, Budget and other common names are all over the world renting cars.

Renting a car for a week will save you money compared to four days.  The rate for a daily rental is quite high so the longer you keep the car, the cost per day goes down.  It is possible to pay more to get your car right at the airport instead of picking it up downtown.