Best Time to Visit: May to June for North of the USA; March to May for South of the USA
Major Cities for International Flights: New York, Washington D.C., San Francisco, Los Angeles
Visa: Generally, a foreign national traveling to the US needs a tourist visa. All eligible international travelers under the Visa Waiver Program, who wish to travel to the US must apply for Electronic System for Travel Authorization (ESTA), and it is only for travel purpose. For all tourists, please make sure your passport has at least six months of validity while traveling.
Money Tips: American dollar (US Dollar) is the official currency. Credit cards are wildly used. While it's always wise to have some cash on hand as a backup when taking the USA tours.