Spirit spokeswoman Misty Pinson said today the Miramar-based airline is completing "a proactive and voluntary check" on aircraft as a precautionary measure following the engine failure on a flight last week. The work should be finished this morning.
Pinson says it takes about 45 minutes to check each aircraft but some flights are "experiencing significant delays."
Passengers told Miami television stations they'd been given few details about the delays. Several passengers became unruly, prompting the Broward Sheriff's Office to respond to the terminal.
A spokeswoman at the Federal Aviation Administration in Atlanta says the agency has no information about the delays.
Delays included flights to New York and Los Angeles.