Spirit Airlines falls after weak Q2 revenue forecast

** Spirit Airlines' SAVE shares fall 1.4% to $3.66 premarket

** Company forecasts Q2 revenue between $1.32 bln and $1.34 bln, vs est $1.46 bln

** Lower forecast driven by sluggish improvement in domestic demand and grounding of dozens of SAVE's aircraft

** Company estimates to avg about 25 grounded aircraft throughout 2024

** Reports bigger-than-expected Q1 adj loss per share, revenue also misses estimates

** Stock down more than 30% since March 4, after company and JetBlue Airways (JBLUE.O) called off their $3.8 bln merger agreement

** SAVE stock has lost more than 75% so far this year