Don't book your flight too early.

Photo: Thinkstock

3 of 9
Don't Book Your Flight Too Far in Advance
The early bird certainly catches the worm, but not always the best airfare. Self-proclaimed "travel detective" Peter Greenberg has sleuthed out the prime time to book your flight.

The best time to start comparison shopping for flights 45 to 60 days before you'd like to travel. Airline computers are intentionally set up not to give you a deal outside that time frame because they are looking at the law of supply and demand, Peter says.