David Becker / AP
In this Thursday, May 9, 2013, photo, an Allegiant Air Capt. Bret Whalen, left, discusses the flight plan with flight attendants Antron Johnson, center, and John Taylor before their flight to Laredo, Tex, at McCarran International Airport in Las Vegas. While other U.S. airlines have struggled with the ups and downs of the economy and oil prices, tiny Allegiant Air has been profitable for 10 straight years.