| Castricum to Hutchinson (Minnesota) | 4,179.71 mi (6,726.60 km) |
| Castricum to Hutto (Texas) | 5,042.74 mi (8,115.51 km) |
| Castricum to Hyattsville (Maryland) | 3,826.61 mi (6,158.33 km) |
| Castricum to Hybla Valley (Virginia) | 3,841.66 mi (6,182.55 km) |
| Castricum to Idaho Falls (Idaho) | 4,810.90 mi (7,742.39 km) |
| Castricum to Idylwood (Virginia) | 3,839.84 mi (6,179.62 km) |
| Castricum to Ilchester (Maryland) | 3,807.17 mi (6,127.04 km) |
| Castricum to Immokalee (Florida) | 4,630.60 mi (7,452.23 km) |
| Castricum to Imperial (California) | 5,529.19 mi (8,898.38 km) |
| Castricum to Imperial Beach (California) | 5,592.51 mi (9,000.28 km) |
| Castricum to Independence (Kentucky) | 4,120.18 mi (6,630.78 km) |
| Castricum to Independence (Missouri) | 4,473.76 mi (7,199.83 km) |
| Castricum to Indian Trail (North Carolina) | 4,160.11 mi (6,695.05 km) |
| Castricum to Indiana (Pennsylvania) | 3,834.03 mi (6,170.28 km) |
| Castricum to Indianapolis (Indiana) | 4,139.64 mi (6,662.11 km) |
