If you're looking to save money on a flight and aren't superstitious, consider flying on Friday the 13th or Sept. 11.

An analysis by Kayak.com, a travel search engine, found that a drop in airline demand on those days has led to prices that are 14 percent lower than the average flight. In other words, you can save money because people are terrified to fly on those "unlucky" dates.

The prices for flying on Halloween were also reduced but only by an average of five percent, according to Kayak spokesman Robert Birge.

Kayak suggests that if you book a flight for an unlucky day,  you can always use the money you save to buy a lucky rabbit's foot.
 

By David Wilkening