| The Amazing Race 18 | |
|---|---|
| Season 18 | |
 Region 1 DVD cover | |
| Presented by | Phil Keoghan |
| No. of teams | 11 |
| Winner | LaKisha "Kisha" & Jennifer "Jen" Hoffman |
| No. of legs | 12 |
| Distance traveled | 40,000 mi (64,000 km) |
| No. of episodes | 11 |
| Release | |
| Original network | CBS |
| Original release | February 20 – May 8, 2011 |
| Additional information | |
| Filming dates | November 20 – December 12, 2010[1] |
| Season chronology | |
The Amazing Race 18 (also known as The Amazing Race: Unfinished Business) is the eighteenth season of the American reality competition show The Amazing Race. Hosted by Phil Keoghan, it featured eleven teams of two, each returning from a previous edition of the series, competing in a race around the world in order to win US$1,000,000. This season visited five continents and nine countries and traveled over 40,000 miles (64,000 km). Starting in Palm Springs, California, racers traveled through Australia, Japan, China, India, Austria, Liechtenstein, Switzerland, and Brazil before returning to the United States and finishing in the Florida Keys. New twists introduced in this season include the no-rest leg, where teams immediately began the subsequent leg after finishing the previous leg, and an automatic U-Turn for the last team to finish the first task. This season was also the first to be filmed and broadcast for high-definition television. The season premiered on CBS on Sunday, February 20, 2011, and the finale aired on May 8, 2011.
Sisters Kisha and Jen Hoffman from The Amazing Race 14 were the winners of this season, while Herbert "Flight Time" Lang and Nathaniel "Big Easy" Lofton of the Harlem Globetrotters from The Amazing Race 15 finished in second place, and father and daughter Gary Ervin and Mallory Ervin from The Amazing Race 17 finished in third place.