| Roskilde to Navodari | 1,067.96 mi (1,718.71 km) |
| Roskilde to Negresti-Oas | 722.25 mi (1,162.35 km) |
| Roskilde to Nehoiu | 943.34 mi (1,518.16 km) |
| Roskilde to Ocna Mures | 817.07 mi (1,314.94 km) |
| Roskilde to Odobesti | 942.76 mi (1,517.23 km) |
| Roskilde to Odorheiu Secuiesc | 861.25 mi (1,386.05 km) |
| Roskilde to Oltenita | 1,024.50 mi (1,648.77 km) |
| Roskilde to Onesti | 907.30 mi (1,460.15 km) |
| Roskilde to Oradea | 727.47 mi (1,170.74 km) |
| Roskilde to Orastie | 831.29 mi (1,337.83 km) |
| Roskilde to Oravita | 844.76 mi (1,359.51 km) |
| Roskilde to Orsova | 879.89 mi (1,416.05 km) |
| Roskilde to Otelu Rosu | 830.53 mi (1,336.61 km) |
| Roskilde to Otopeni | 982.32 mi (1,580.90 km) |
| Roskilde to Ovidiu | 1,069.20 mi (1,720.70 km) |
