Coming in December: the eTrack and the eTag, from Air France and KLM. The innovations let you drop off your bags without checking them, and track them throughout your journey. Courtesy of FastTrack Co. hide caption

itoggle caption Courtesy of FastTrack Co.

The Butterfly Garden in Terminal 3 is just one of the pleasant diversions at the Changi airport in Singapore. Wong Maye-E/AP hide caption

itoggle caption Wong Maye-E/AP

A traveler walks by a Delta Airlines skycap kiosk at San Francisco International Airport. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

A Transportation Security Administration volunteer demonstrates a full-body scanner at Chicago's O'Hare International Airport in March 2010. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images

Tight quarters: Aboard a United Airlines Embraer-145, 50-passenger jet. (June 1, 2008 file photo taken at Dulles International Airport.) Paul J. Richards /AFP/Getty Images hide caption

itoggle caption Paul J. Richards /AFP/Getty Images

Julie Capper stands with her hologram at Manchester International Airport. Julie and her hologram work in the same area — which has created some confusion. Courtesy of Manchester International Airport hide caption

itoggle caption Courtesy of Manchester International Airport