| Southborough to Hutchinson (Minnesota) | 4,082.67 mi (6,570.43 km) |
| Southborough to Hutto (Texas) | 4,918.92 mi (7,916.23 km) |
| Southborough to Hyattsville (Maryland) | 3,682.60 mi (5,926.57 km) |
| Southborough to Hybla Valley (Virginia) | 3,697.34 mi (5,950.30 km) |
| Southborough to Idaho Falls (Idaho) | 4,746.24 mi (7,638.33 km) |
| Southborough to Idylwood (Virginia) | 3,696.08 mi (5,948.27 km) |
| Southborough to Ilchester (Maryland) | 3,663.48 mi (5,895.80 km) |
| Southborough to Immokalee (Florida) | 4,468.39 mi (7,191.19 km) |
| Southborough to Imperial (California) | 5,450.60 mi (8,771.89 km) |
| Southborough to Imperial Beach (California) | 5,517.18 mi (8,879.04 km) |
| Southborough to Independence (Kentucky) | 3,989.55 mi (6,420.56 km) |
| Southborough to Independence (Missouri) | 4,362.04 mi (7,020.03 km) |
| Southborough to Indian Trail (North Carolina) | 4,013.45 mi (6,459.02 km) |
| Southborough to Indiana (Pennsylvania) | 3,698.02 mi (5,951.39 km) |
| Southborough to Indianapolis (Indiana) | 4,013.97 mi (6,459.86 km) |
