Heathrow Airport, London
While Heathrow already boasts an impressive selection of retailers, a new terminal opening early next year will deliver two additional floors of shopping that will include a Harrods outpost selling designer labels not available at its other airport outlets. For now, though, passengers can peruse the new Mulberry shop (the first-ever airport boutique for the brand), the Way In denim concept store, Chanel, and British favorites like Ted Baker and Kurt Geiger. And if you're having trouble deciding what to get, you can call on one of the airport's shopping consultants (the service is complimentary). www.heathrowairport.com   

Chanel, Terminals 3 and 4
Harrods, all terminals
Kurt Geiger, Terminal 3
Mulberry, Terminals 1 and 4
Ted Baker, Terminal 4
Way In, Terminal 3

Portland International Airport, Portland
Think locals would never drive to the nearest airport to do some shopping? They do in Portland. The pre-security-check stores are just that good. Travelers passing through love it, too, because of the airport's commitment to Oregon-based retailers. Visitors can take home a pair of Air Max 360 cross trainers from Nike, new and used books from Powell's, or glass ornaments made from Mount St. Helens ash from the Real Mother Goose. www.flypdx.com  

Nike, Oregon Market (pre-security)
Powell's Books, Oregon Market, Concourses C and D
The Real Mother Goose, Oregon Market