| Webster Groves to Indianapolis (Indiana) | 239.91 mi (386.10 km) |
| Webster Groves to Indianola (Iowa) | 256.28 mi (412.44 km) |
| Webster Groves to Indio (California) | 1,476.79 mi (2,376.66 km) |
| Webster Groves to Inglewood (California) | 1,585.16 mi (2,551.07 km) |
| Webster Groves to Inkster (Michigan) | 449.90 mi (724.04 km) |
| Webster Groves to Inver Grove Heights (Minnesota) | 452.96 mi (728.97 km) |
| Webster Groves to Inwood (New York) | 893.62 mi (1,438.14 km) |
| Webster Groves to Iona (Florida) | 965.64 mi (1,554.05 km) |
| Webster Groves to Ionia (Michigan) | 410.18 mi (660.11 km) |
| Webster Groves to Iowa City (Iowa) | 220.97 mi (355.62 km) |
| Webster Groves to Irmo (South Carolina) | 596.06 mi (959.26 km) |
| Webster Groves to Irondale (Alabama) | 404.82 mi (651.49 km) |
| Webster Groves to Ironton (Ohio) | 414.64 mi (667.31 km) |
| Webster Groves to Irvine (California) | 1,561.04 mi (2,512.25 km) |
| Webster Groves to Irving (Texas) | 542.24 mi (872.65 km) |
