London has an efficient transportation system with various options such as the London Underground, buses, taxis, and bike rentals. A contactless credit card or an Oyster Card is the best way to pay for your fare. Taxis are more expensive but are a comfortable option for families. Expect to spend between £5-£10 for a single journey or £25 for a 24-hour travel card.
If you have more time, consider exploring the famous Oxford Street, famous for its shopping experience. Also, you can take a day trip to the nearby Windsor Castle, Stonehenge or Bath. If you have less time, you can skip The Sherlock Holmes Museum, and spend more time in The West End.
London has six major airports, with Heathrow Airport (LHR) being the largest and busiest. Heathrow Airport (LHR) is located about 14 miles west of Central London and is well connected to the city with the Heathrow Express train service, which takes approximately 15 minutes to Paddington Station. Gatwick Airport (LGW) is located south of London, about an hour's journey, and can be reached via the Gatwick Express train service or coach buses.