FarePredictor.com

About

FarePredictor advises travelers when to purchase a flight or to delay their booking. This guidance relies on historical price information instead of speculation. While most flight services display current ticket costs, FarePredictor indicates if a price is higher or lower than its past average and predicts if fares will increase or decrease. You can search your route, view a recommendation, and receive alerts for price changes. It is free to try and does not require a credit card.