| Datteln to Navodari | 1,100.89 mi (1,771.71 km) |
| Datteln to Negresti-Oas | 762.01 mi (1,226.34 km) |
| Datteln to Nehoiu | 967.28 mi (1,556.69 km) |
| Datteln to Ocna Mures | 829.61 mi (1,335.13 km) |
| Datteln to Odobesti | 982.96 mi (1,581.93 km) |
| Datteln to Odorheiu Secuiesc | 890.99 mi (1,433.91 km) |
| Datteln to Oltenita | 1,031.28 mi (1,659.68 km) |
| Datteln to Onesti | 953.29 mi (1,534.17 km) |
| Datteln to Oradea | 726.71 mi (1,169.52 km) |
| Datteln to Orastie | 823.79 mi (1,325.76 km) |
| Datteln to Oravita | 799.42 mi (1,286.54 km) |
| Datteln to Orsova | 840.06 mi (1,351.95 km) |
| Datteln to Otelu Rosu | 804.18 mi (1,294.20 km) |
| Datteln to Otopeni | 989.67 mi (1,592.72 km) |
| Datteln to Ovidiu | 1,100.76 mi (1,771.50 km) |
