(Fortune Magazine) – Thanks to packed planes, crowded runways, and thunderstorms, most business travelers will be spending more time than they'd like in airports this summer. If you're anything like me, you've considered joining an airline lounge club—but balked at the price. (American, Delta, United, and Continental all charge upwards of $400 a year, which is a lot unless you're particularly loyal to one carrier.) Then came British-based Priority Pass (prioritypass.com). Long a favorite of international travel gurus but a well-kept secret stateside, it allows access to more than 500 airline lounges in 275 cities worldwide. The best part? It's a bargain: Basic membership starts at $99 a year, plus $24 each time you visit a club; the $399 plan allows unlimited visits. I first flashed my black-and-gold card at Delta's Crown Room in L.A. the other day—and the complimentary glass of wine in a quiet room sure helped pass my four-hour delay.