Receive fare-sale alerts
Human-powered airfarewatchdog.com separates itself from other, less intelligent ones by searching where most don’t (including for Web-only fare sales) and alerting you to deals virtually the second they happen. Bonus: the Airfarewatchdog team hunts down promo code deals, including those on Southwest Airlines and Allegiant Air, calculates the discount, and lists the fares one by one. And unlike many online travel agents, a team of actual people is constantly verifying seat availability; if it’s no longer available, the site won’t list it. Read Airfarewatchblog for more ideas on searching and great insight into airline travel in general.