| Healdsburg to Ickenham | 5,305.78 mi (8,538.83 km) |
| Healdsburg to Ifield | 5,334.94 mi (8,585.76 km) |
| Healdsburg to Ilford | 5,321.30 mi (8,563.80 km) |
| Healdsburg to Ilfracombe | 5,213.54 mi (8,390.38 km) |
| Healdsburg to Ilkeston | 5,209.60 mi (8,384.04 km) |
| Healdsburg to Ilkley | 5,147.38 mi (8,283.91 km) |
| Healdsburg to Immingham | 5,208.00 mi (8,381.47 km) |
| Healdsburg to Ince-in-Makerfield | 5,144.28 mi (8,278.91 km) |
| Healdsburg to Inverness | 4,908.11 mi (7,898.84 km) |
| Healdsburg to Inverurie | 4,966.88 mi (7,993.43 km) |
| Healdsburg to Ipswich | 5,326.07 mi (8,571.48 km) |
| Healdsburg to Irlam | 5,154.07 mi (8,294.67 km) |
| Healdsburg to Irthlingborough | 5,262.13 mi (8,468.59 km) |
| Healdsburg to Irvine | 4,984.58 mi (8,021.90 km) |
| Healdsburg to Islington | 5,316.53 mi (8,556.13 km) |
