But as new services emerge, travel between the two countries is becoming more straightforward than at any point since sanctions were introduced in the early 1960s.

Getting there is still expensive: There are no direct commercial flights from the United States to Cuba, and it could be a year or more before agreements between the countries’ aviation authorities make them possible. Charter flights cost about $450 to $500 round-trip from Miami to Havana or $850 round-trip from New York.

Despite the cost, they are the most popular option. Of an estimated 600,000 passengers from the United States who visited Cuba last year, including about half a million Cubans and Cuban-Americans, some 365,000 passengers used charter flights, according to data compiled by OAG, a British-based company that monitors air traffic.

And the number of routes is growing: Over the last few months, charter companies have announced new flights from Orlando, Tampa, New Orleans and New York.

In February, CheapAir.com began allowing customers to book flights to Cuba, either on licensed charters or through third countries. A flight from New York to Havana via Miami (outbound) and Mexico City (return), for example, with a combination of Interjet, CTS Charters and American Airlines, is listed at over $1,200.

A less expensive — and more romantic — option could be available in the next few months after the Treasury Department this month issued licenses to at least three Florida companies (Baja Ferries, Havana Ferry Partners and Airline Brokers Company) to offer services between the United States and Cuba.

Now that it is easier to get to Cuba, the challenge is finding somewhere to sleep.

Travel organizers operating in Cuba say that a sharp increase in American visitors, and in Europeans and Canadians eager to see Cuba “before it changes,” has stretched Cuba’s tourism infrastructure almost to its limit.