| Llantrisant to Indianola (Iowa) | 4,072.43 mi (6,553.95 km) |
| Llantrisant to Indio (California) | 5,283.60 mi (8,503.13 km) |
| Llantrisant to Inglewood (California) | 5,341.82 mi (8,596.82 km) |
| Llantrisant to Inkster (Michigan) | 3,634.64 mi (5,849.38 km) |
| Llantrisant to Inver Grove Heights (Minnesota) | 3,891.87 mi (6,263.36 km) |
| Llantrisant to Inwood (New York) | 3,320.53 mi (5,343.87 km) |
| Llantrisant to Iona (Florida) | 4,327.29 mi (6,964.11 km) |
| Llantrisant to Ionia (Michigan) | 3,673.28 mi (5,911.57 km) |
| Llantrisant to Iowa City (Iowa) | 3,981.65 mi (6,407.85 km) |
| Llantrisant to Irmo (South Carolina) | 3,923.92 mi (6,314.93 km) |
| Llantrisant to Irondale (Alabama) | 4,176.11 mi (6,720.80 km) |
| Llantrisant to Ironton (Ohio) | 3,778.13 mi (6,080.31 km) |
| Llantrisant to Irvine (California) | 5,338.58 mi (8,591.61 km) |
| Llantrisant to Irving (Texas) | 4,623.36 mi (7,440.57 km) |
| Llantrisant to Isabela (Puerto Rico) | 4,098.48 mi (6,595.86 km) |
