after 24 hour of booking check the booking prices next morning ,if it fell , call the airline company ask them to cancel you first ticket , and buy a new one.
Check Twitter and Facebook:
most of airlines companies share their new offers on social media before booking for a trip check their social accounts you can find low price ticket.
Become a frequent flyer :
if you book each time you fly with same company , you may have a frequent flier card , wish allow you to book a discounted ticket.
Fly out early:
usually the cheapest flights are the flight of The first of the morning is .
Check the biggest online booking and ticket-sellers— like Expedia, Travelocity and Orbitz,,and skyscanner, AirfareWatchdog, Yapta and Hipmunk for deals too.