| Royston to Indianola (Iowa) | 4,179.66 mi (6,726.51 km) |
| Royston to Indio (California) | 5,372.83 mi (8,646.74 km) |
| Royston to Inglewood (California) | 5,427.73 mi (8,735.08 km) |
| Royston to Inkster (Michigan) | 3,750.82 mi (6,036.36 km) |
| Royston to Inver Grove Heights (Minnesota) | 3,994.29 mi (6,428.18 km) |
| Royston to Inwood (New York) | 3,447.59 mi (5,548.36 km) |
| Royston to Iona (Florida) | 4,462.30 mi (7,181.38 km) |
| Royston to Ionia (Michigan) | 3,786.74 mi (6,094.17 km) |
| Royston to Iowa City (Iowa) | 4,090.60 mi (6,583.19 km) |
| Royston to Irmo (South Carolina) | 4,052.53 mi (6,521.92 km) |
| Royston to Irondale (Alabama) | 4,300.43 mi (6,920.88 km) |
| Royston to Ironton (Ohio) | 3,900.18 mi (6,276.73 km) |
| Royston to Irvine (California) | 5,425.66 mi (8,731.76 km) |
| Royston to Irving (Texas) | 4,737.97 mi (7,625.03 km) |
| Royston to Isabela (Puerto Rico) | 4,245.18 mi (6,831.96 km) |
