INFORMATION - You will need to apply for a Visa to enter the USA if you have recently visited Cuba.

If you've been to Cuba recently and are intending to fly to the USA be aware that the US makes it difficult to obtain an ESTA due to the US determining that Cuba is a state sponsor of terrorism, therefore you must apply for a Visa if you wish to enter the US. The official wording from US Customs and Border Protection is: 

"If a traveler is found to have visited a country designated as State Sponsor of Terrorism, the traveler is no longer eligible to participate in the Visa Wavier Program and must apply for a visa to enter the United States."