Low-cost carrier Allegiant Air's scheduled passenger revenue per available seat mile (PRASM) declined 6.5% in February.
The carrier's passenger traffic for its scheduled services grew by 15.7% in March, while capacity rose by 16.3%, resulting in a 0.5 percentage point decline in the load factor to 91.9%.
Passenger numbers increased 8.3% year-on-year to 788,000.
Allegiant estimates its March PRASM will decline by 0.7% to 1.1%.
For April, the airline forecasts its scheduled capacity to grow by 7%. Allegiant estimates that scheduled capacity in the second quarter will grow by 19% to 23%, and by 5% to 9% in the third quarter.