Q. I booked my flight to Orlando on Allegiant for $159 round-trip, and not even 12 hours later, the price of the same trip was down to $59 round-trip. Needless to say, I'm a little frustrated. Is there something I can do?

A. Some airlines do refund the difference for a price drop (and charge a fee for doing so, which sometimes negates any savings...) but Allegiant is not one of them. From their website:

What if the fare drops on a ticket after I have already purchased it?
The desire for the lowest possible fare is understandable; however, Allegiant Air unfortunately cannot refund or credit fare differences after a reservation has been made. When the original ticket is purchased, via the web or by a reservations agent, the purchaser of the ticket is prompted or asked if they agree to the following terms and conditions in order to purchase the ticket: "All tickets are non-refundable, one-way, and ticketless". This is because Allegiant Air unfortunately cannot control when a passenger will book their flight. Allegiant also does not have advance knowledge of when specials will be offered. The fluctuation in a fare may also be caused by cancellations, and since Allegiant does not overbook its flights, a seat may become available at a lower price.

For future reference, Delta, United, American, US Airways, and Continental all have some sort of refund policy to address such fare decreases.