Farthest distance travelled by a postage stamp

According to Official Guinness Records,

The farthest distance travelled by a postage stamp is 5,250,843,896 km (3,262,723,132 mi) and was achieved by the United States Postal Service (USA), who placed the postal stamp on the New Horizons Spacecraft, launched from Cape Canaveral, Florida, USA, on 19 January 2006 and arriving at Pluto on 14 July 2015. The stamp that was placed on the New Horizons spacecraft was a 1991 "Pluto-not yet explored" U.S. postage stamp.

For a complete list of 2015 records, please visit 2015 Guinness Records in United States.

Other United States records that might interest you:

• Most backflips on a bicycle (single leap)
• Fastest time to visit all NFL stadiums
• Highest score for "So What", Just Dance 4 (Xbox 360 Kinect)
• Longest open saltwater SCUBA dive (female)
• Longest inflatable water slide
• Oldest living mule
• Lowest fuel consumption driving to 48 contiguous US States (diesel car)
• Largest collection of wine cans
• Most expensive matchbook
• Most consecutive jumps on a pogo stick