On Wednesday, JetBlue Airways made a $3.6 billion proposal for the low-cost carrier, which caught most investors off back, with experts questioning the merits of a merger between the two carriers. According to Raymond James analysts, because both carriers’ fleets are dominated by Airbus SE, any potential cost savings from the merger will be mitigated because JetBlue would need to raise the pay of Spirit pilots, who are on a lower band. JetBlue announced an unsolicited $3.6 billion bid for Spirit on Tuesday, at $33 per share, potentially delaying a $2.7 billion merger between Spirit and Frontier Group Holdings Inc.