| San Marcos to Ickenham | 5,445.52 mi (8,763.72 km) |
| San Marcos to Ifield | 5,472.92 mi (8,807.82 km) |
| San Marcos to Ilford | 5,462.99 mi (8,791.84 km) |
| San Marcos to Ilfracombe | 5,337.84 mi (8,590.43 km) |
| San Marcos to Ilkeston | 5,354.98 mi (8,618.00 km) |
| San Marcos to Ilkley | 5,296.95 mi (8,524.61 km) |
| San Marcos to Immingham | 5,361.13 mi (8,627.90 km) |
| San Marcos to Ince-in-Makerfield | 5,288.79 mi (8,511.48 km) |
| San Marcos to Inverness | 5,072.83 mi (8,163.94 km) |
| San Marcos to Inverurie | 5,135.85 mi (8,265.36 km) |
| San Marcos to Ipswich | 5,474.69 mi (8,810.67 km) |
| San Marcos to Irlam | 5,298.58 mi (8,527.24 km) |
| San Marcos to Irthlingborough | 5,405.97 mi (8,700.07 km) |
| San Marcos to Irvine | 5,135.79 mi (8,265.26 km) |
| San Marcos to Islington | 5,457.45 mi (8,782.92 km) |
