Spirit Airlines (NYSE:SAVE) saw notable increases in several of its key metrics last month and for the year-to-date period. For March, the company's revenue passenger miles grew by 19.1% over March 2012's number, to hit almost 1 billion. Available seat miles increased by 16.5% on a year-over-year basis, to 1.1 billion. Load factor -- i.e., airplane occupancy -- grew by 2.0 percentage points over the same time frame, coming in at 87.9%.
On a year-to-date basis, RPMs amounted to 2.7 billion, a 21.3% increase over the same period of 2012. ASMs advanced at nearly the same rate, by 20.8%, to 3.1 billion. Load factor for the three months saw a slight uptick on a comparative basis, to 85.1%, against 84.8% in the same period last year.
Fool contributor Eric Volkman has no position in Spirit Airlines. The Motley Fool owns shares of Spirit Airlines. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.