| Seaham to Nowy Dwor Mazowiecki | 914.74 mi (1,472.14 km) |
| Seaham to Nowy Sacz | 994.60 mi (1,600.66 km) |
| Seaham to Nowy Targ | 973.65 mi (1,566.94 km) |
| Seaham to Nowy Tomysl | 735.57 mi (1,183.79 km) |
| Seaham to Nysa | 835.71 mi (1,344.95 km) |
| Seaham to Oborniki | 754.89 mi (1,214.88 km) |
| Seaham to Oborniki Slaskie | 793.17 mi (1,276.49 km) |
| Seaham to Olawa | 819.70 mi (1,319.18 km) |
| Seaham to Olecko | 954.99 mi (1,536.90 km) |
| Seaham to Olesnica | 814.92 mi (1,311.49 km) |
| Seaham to Olesno | 865.11 mi (1,392.27 km) |
| Seaham to Olkusz | 928.63 mi (1,494.48 km) |
| Seaham to Olsztyn | 879.00 mi (1,414.61 km) |
| Seaham to Opalenica | 746.87 mi (1,201.98 km) |
| Seaham to Opoczno | 924.23 mi (1,487.41 km) |
