| Skien to Octeville | 798.23 mi (1,284.63 km) |
| Skien to Oignies | 657.04 mi (1,057.41 km) |
| Skien to Oissel | 761.00 mi (1,224.72 km) |
| Skien to Olivet | 843.15 mi (1,356.92 km) |
| Skien to Ollioules | 1,121.36 mi (1,804.65 km) |
| Skien to Olonne-sur-Mer | 991.73 mi (1,596.04 km) |
| Skien to Oloron-Sainte-Marie | 1,187.54 mi (1,911.16 km) |
| Skien to Onet Village | 1,066.39 mi (1,716.19 km) |
| Skien to Onnaing | 653.32 mi (1,051.42 km) |
| Skien to Orange | 1,060.21 mi (1,706.24 km) |
| Skien to Orchies | 652.85 mi (1,050.66 km) |
| Skien to Orleans | 840.50 mi (1,352.65 km) |
| Skien to Orly | 778.30 mi (1,252.55 km) |
| Skien to Ormesson-sur-Marne | 773.41 mi (1,244.68 km) |
| Skien to Orsay | 784.37 mi (1,262.32 km) |
