Tricks to Hack Your Business Travel BudgetHere's how you can save hundreds of dollars on your next trip.

David Heath needed to attend meetings in Austin, L.A., San Francisco and Las Vegas. The best airfare he found was $948, with two layovers. Yuck. So instead of calling atravel agent, he called his travel hacker.

Travel addicts, who once simply blogged about how to exploit online glitches, airline loyalty memberships and credit card points, are now using their tricks to book corporatetravel. One of the largest groups is an agency calledFlightFox, which, for $49, booked Heath's four-stop trip for $704. "More important," says Heath, cofounder of the athletic sock manufacturerBombas, "they saved me hours of frustration."