| Roskilde to Oignies | 519.42 mi (835.92 km) |
| Roskilde to Oissel | 634.06 mi (1,020.41 km) |
| Roskilde to Olivet | 690.69 mi (1,111.57 km) |
| Roskilde to Ollioules | 907.85 mi (1,461.05 km) |
| Roskilde to Olonne-sur-Mer | 867.60 mi (1,396.27 km) |
| Roskilde to Oloron-Sainte-Marie | 1,028.90 mi (1,655.85 km) |
| Roskilde to Onet Village | 884.42 mi (1,423.34 km) |
| Roskilde to Onnaing | 505.84 mi (814.07 km) |
| Roskilde to Orange | 857.62 mi (1,380.21 km) |
| Roskilde to Orchies | 511.67 mi (823.46 km) |
| Roskilde to Orleans | 688.29 mi (1,107.69 km) |
| Roskilde to Orly | 628.21 mi (1,011.00 km) |
| Roskilde to Ormesson-sur-Marne | 621.92 mi (1,000.88 km) |
| Roskilde to Orsay | 636.38 mi (1,024.15 km) |
| Roskilde to Orthez | 1,015.21 mi (1,633.82 km) |
