On Dec. 1, 2016, a pair of water cannons at Miami International Airport sprayed an arc over a Frontier Airlines jet in celebration as it prepared to take off on the Denver-based airline’s much-ballyhooed first flight to Cuba following an easing of relations with the island nation.

Now, just 3-1/2 months later, Frontier says it will pull the plug on its daily Miami-Havana service on June 4.

Frontier was one of two airlines — along with Fort Lauderdale, Florida-based Silver Airways— that announced…