| Gelsenkirchen to Oegstgeest | 121.45 mi (195.46 km) |
| Gelsenkirchen to Oirschot | 77.41 mi (124.58 km) |
| Gelsenkirchen to Oisterwijk | 81.76 mi (131.58 km) |
| Gelsenkirchen to Oldebroek | 82.25 mi (132.37 km) |
| Gelsenkirchen to Oldenzaal | 55.73 mi (89.69 km) |
| Gelsenkirchen to Ommen | 74.95 mi (120.63 km) |
| Gelsenkirchen to Oosterend | 111.64 mi (179.67 km) |
| Gelsenkirchen to Oosterhout | 96.70 mi (155.63 km) |
| Gelsenkirchen to Oosterwolde | 107.40 mi (172.85 km) |
| Gelsenkirchen to Oostzaan | 113.62 mi (182.86 km) |
| Gelsenkirchen to Opmeer | 122.50 mi (197.14 km) |
| Gelsenkirchen to Oss | 70.05 mi (112.73 km) |
| Gelsenkirchen to Oud-Beijerland | 117.54 mi (189.16 km) |
| Gelsenkirchen to Oudenbosch | 110.78 mi (178.28 km) |
| Gelsenkirchen to Oudewater | 101.55 mi (163.42 km) |
