Spirit Airlines is the fifth airline to either cut back or end service to Cuba. The carrier announced the discontinuation of flights from Fort Lauderdale-Hollywood International Airport to Havana (HAV) May 31.

The carrier had service for four months, ultimately learning demand for Cuba is significantly less than initial expectations by airlines. The Obama administration restored diplomatic relations with Cuba two years ago and softened the travel restrictions to the island. Eight airlines were chosen by the Department of Transportation to begin flying to Cuba last summer and after an initial surge, demand waned.

“The costs of serving Havana continue to outweigh the demand for service,” said a Spirit spokesperson. “Due to overcapacity and the additional costs associated with flying to Cuba, we don’t find it sustainable to continue this service while maintaining our commitment to pass along ultra-low fares to our customers.”

Subsequently, American Airlines reduced service in November; JetBlue announced the switch to a smaller aircraft reducing the number of daily seats; Silver Airways cut service altogether; and Frontier is eliminating its one route from Miami (MIA) in June.

Spirit will offer once-daily service May 3–24, and twice-daily flights May 25–31. Passengers who booked flights after May 31 will receive a full refund.