The cheapest flight from London Gatwick to Rome's main airport Fiumicino is usually available departing midweek, but check the information panels on cheapest weekday for current price information. Since the flight time between the cities of London and Rome is short and comprises only around 2.5 hours, it makes most sense to book a direct flight, and usually, due to the number of low-cost carriers serving the route London-Rome, this is also the cheapest option. The panels above will also conveniently tell you when would be the cheapest time to book a flight from Gatwick to Fiumicino.
The best travelling time in terms of price would usually be midweek and at other times when prices are low - usually due to the lack of general popularity of these particular travel times. Our tip would be to avoid school holidays, Friday departures and Sunday returns to keep prices down.
The weather in Rome in the winter months can be varied - it may be cold, mild, wet or windy. However, you can expect temperatures to be slightly if not significantly higher than those in London. Summers are generally hot and dry.
Travel preperations would include taking enough local currency, learning a few phrases of Italian, and perhaps checking information on how to get from the airport to your accomodation. Prepare to arrive at Gatwick airport in plenty of time - the airport is large and has two terminals. Allow plenty of time to get your bearings, for check-in procedures and security, which can take some time especially at peak travel times.
If you are not taking a taxi or hire car after arriving at Rome fiumicino airport, then the official airport website will have up- to-date information on local transport options.