| SeaTac to Ickenham | 4,781.43 mi (7,694.97 km) |
| SeaTac to Ifield | 4,811.54 mi (7,743.42 km) |
| SeaTac to Ilford | 4,795.51 mi (7,717.63 km) |
| SeaTac to Ilfracombe | 4,700.68 mi (7,565.01 km) |
| SeaTac to Ilkeston | 4,682.29 mi (7,535.41 km) |
| SeaTac to Ilkley | 4,617.81 mi (7,431.64 km) |
| SeaTac to Immingham | 4,675.60 mi (7,524.65 km) |
| SeaTac to Ince-in-Makerfield | 4,618.10 mi (7,432.11 km) |
| SeaTac to Inverness | 4,370.62 mi (7,033.83 km) |
| SeaTac to Inverurie | 4,426.24 mi (7,123.34 km) |
| SeaTac to Ipswich | 4,795.65 mi (7,717.86 km) |
| SeaTac to Irlam | 4,627.81 mi (7,447.73 km) |
| SeaTac to Irthlingborough | 4,735.41 mi (7,620.91 km) |
| SeaTac to Irvine | 4,455.28 mi (7,170.09 km) |
| SeaTac to Islington | 4,791.30 mi (7,710.85 km) |
