Spirit Airlines Incorporated (NYSE:SAVE) has rejected JetBlue Airways Corporation (NASDAQ:JBLU)’s acquisition offer and says it will stick to its February deal with Frontier Group Holdings Inc (NASDAQ:ULCC). Antitrust issues are said to play a role in the turndown. Regulatory ConcernsQ1 2022 hedge fund letters, conferences and more In a letter addressed to JetBlue, Spirit said: “We believe a combination of JetBlue and Spirit has a low probability of receiving antitrust clearance so long as JetBlue’s Northeast Alliance with American Airlines Group Inc (NASDAQ:AAL) remains in existence.” “Given …