1. Airline ticket prices can change several times within the same hour. 2. Once you have done a booking search many companies store this information in a cooki

1. Airline ticket prices can change several times within the same hour. 2. Once you have done a booking search many companies store this information in a cookie (or otherwise) to prevent you from seeing cheaper prices on subsequent searches. Try deleting your cookies next time...it usually works for me. Also I never log in to my account until I know exactly what I want.