If you arrive by air or sea from a non-Italian destination, you will usually be checked by Italian immigration officials. In my experience they are efficient and courteous, so long as you are co-operative and polite. Remember that you are a guest in their country; have your passport open at the page with your photograph.
The ease in getting to Italy depends from where you are coming! This guide is aimed at travellers approaching from other European countries and North America. While the majority will arrive by air, we will also describe other useful options by land and sea, beginning with a proposed driving route from northern Europe. If you're arriving from the UK you can compare prices on flights to Italy using flight comparison website cheap flights.
Do remember that Italy is a very large country and while road and rail links are good, it does take time to travel. While it is good to see the countryside from the window of a car or train, it is far better to maximize the time taken to get to various locations and enjoy them thoroughly when you arrive. If you don't have, or don't hire an air-conditioned car in the summer, it can be unbearable touring by car due to excessive heat. While all Inter-city trains are air conditioned, regional trains are not - and there is nothing worse than sharing the smell of other people's body odour! !
Read my tips about flying into Ancona aiport/Aeroporto delle Marche and taking a train from the airport rail station.