| Seaham to Oerlinghausen | 456.96 mi (735.40 km) |
| Seaham to Oestrich-Winkel | 515.71 mi (829.95 km) |
| Seaham to Offenburg | 592.26 mi (953.15 km) |
| Seaham to Oftersheim | 564.91 mi (909.14 km) |
| Seaham to Ohrdruf | 574.06 mi (923.86 km) |
| Seaham to Ohringen | 602.40 mi (969.46 km) |
| Seaham to Olbernhau | 676.27 mi (1,088.34 km) |
| Seaham to Olching | 709.88 mi (1,142.44 km) |
| Seaham to Oldenburg | 405.01 mi (651.81 km) |
| Seaham to Oldenburg in Holstein | 490.38 mi (789.20 km) |
| Seaham to Olfen | 419.62 mi (675.31 km) |
| Seaham to Olpe | 463.92 mi (746.61 km) |
| Seaham to Olsberg | 472.94 mi (761.12 km) |
| Seaham to Oranienburg | 610.85 mi (983.08 km) |
| Seaham to Ortenberg | 534.23 mi (859.75 km) |
