| Havre de Grace to Noventa Vicentina | 4,260.22 mi (6,856.16 km) |
| Havre de Grace to Novi di Modena | 4,246.20 mi (6,833.59 km) |
| Havre de Grace to Novi Ligure | 4,159.27 mi (6,693.70 km) |
| Havre de Grace to Nuoro | 4,332.23 mi (6,972.06 km) |
| Havre de Grace to Occhiobello | 4,274.38 mi (6,878.95 km) |
| Havre de Grace to Oderzo | 4,284.13 mi (6,894.64 km) |
| Havre de Grace to Oggiono | 4,150.78 mi (6,680.03 km) |
| Havre de Grace to Olbia | 4,319.06 mi (6,950.86 km) |
| Havre de Grace to Oleggio | 4,125.88 mi (6,639.96 km) |
| Havre de Grace to Olgiate Comasco | 4,134.38 mi (6,653.64 km) |
| Havre de Grace to Olgiate Olona | 4,135.56 mi (6,655.55 km) |
| Havre de Grace to Omegna | 4,107.41 mi (6,610.24 km) |
| Havre de Grace to Opera | 4,157.86 mi (6,691.42 km) |
| Havre de Grace to Oppeano | 4,244.76 mi (6,831.28 km) |
| Havre de Grace to Orbassano | 4,097.10 mi (6,593.64 km) |
