| Mardin to Nuth | 1,942.51 mi (3,126.17 km) |
| Mardin to Oegstgeest | 2,024.75 mi (3,258.52 km) |
| Mardin to Oirschot | 1,977.63 mi (3,182.68 km) |
| Mardin to Oisterwijk | 1,983.32 mi (3,191.85 km) |
| Mardin to Oldebroek | 1,972.26 mi (3,174.05 km) |
| Mardin to Oldenzaal | 1,928.02 mi (3,102.84 km) |
| Mardin to Ommen | 1,953.09 mi (3,143.19 km) |
| Mardin to Oosterend | 1,977.89 mi (3,183.10 km) |
| Mardin to Oosterhout | 1,998.61 mi (3,216.46 km) |
| Mardin to Oosterwolde | 1,968.75 mi (3,168.40 km) |
| Mardin to Oostzaan | 2,012.76 mi (3,239.22 km) |
| Mardin to Opmeer | 2,015.52 mi (3,243.66 km) |
| Mardin to Oss | 1,973.80 mi (3,176.52 km) |
| Mardin to Oud-Beijerland | 2,020.65 mi (3,251.92 km) |
| Mardin to Oudenbosch | 2,011.42 mi (3,237.06 km) |
