| Seaford to Opole | 778.26 mi (1,252.49 km) |
| Seaford to Orzesze | 819.28 mi (1,318.50 km) |
| Seaford to Osowa | 808.57 mi (1,301.27 km) |
| Seaford to Ostroda | 861.58 mi (1,386.58 km) |
| Seaford to Ostroleka | 924.84 mi (1,488.39 km) |
| Seaford to Ostrow Mazowiecka | 938.55 mi (1,510.45 km) |
| Seaford to Ostrow Wielkopolski | 767.36 mi (1,234.95 km) |
| Seaford to Ostrowiec Swietokrzyski | 925.96 mi (1,490.18 km) |
| Seaford to Ostrzeszow | 773.23 mi (1,244.40 km) |
| Seaford to Oswiecim | 841.23 mi (1,353.83 km) |
| Seaford to Otwock | 913.00 mi (1,469.32 km) |
| Seaford to Ozarow Mazowiecki | 892.97 mi (1,437.09 km) |
| Seaford to Ozimek | 790.35 mi (1,271.95 km) |
| Seaford to Ozorkow | 829.17 mi (1,334.41 km) |
| Seaford to Pabianice | 834.44 mi (1,342.91 km) |
