MommyPoints has the details for frequent flyers on several airlines.
Buying an airline ticket at the last minute can be very expensive in dollars, less so with frequent-flyer miles / points. If you have elite status, there may be no additional cost in miles.
All the major US airlines (nine, maybe ten) are vying for the 20 daily flights to Havana which are slated to become available soon.
US Airlines Battle Over Havana
More and more Americans are making the trip, and they all return with the advice that “you’d better go now, before it opens up completely.”
UPDATE: The Washington Post newspaper reports that President Obama plans a visit to Cuba next month.
As the United States slowly opens up access to Cuba, airlines are applying for airport “slots” so they can provide scheduled service to the island nation.
Bidding for Cuba, Airline-Style
Cuba recognizes that a huge influx of Americans would overwhelm their tourist facilities.