| Grenzach-Wyhlen to Octeville | 448.30 mi (721.48 km) |
| Grenzach-Wyhlen to Oignies | 292.03 mi (469.97 km) |
| Grenzach-Wyhlen to Oissel | 325.29 mi (523.50 km) |
| Grenzach-Wyhlen to Olivet | 268.54 mi (432.18 km) |
| Grenzach-Wyhlen to Ollioules | 317.28 mi (510.62 km) |
| Grenzach-Wyhlen to Olonne-sur-Mer | 449.30 mi (723.08 km) |
| Grenzach-Wyhlen to Oloron-Sainte-Marie | 501.15 mi (806.52 km) |
| Grenzach-Wyhlen to Onet Village | 327.99 mi (527.85 km) |
| Grenzach-Wyhlen to Onnaing | 268.86 mi (432.69 km) |
| Grenzach-Wyhlen to Orange | 272.78 mi (438.99 km) |
| Grenzach-Wyhlen to Orchies | 284.19 mi (457.36 km) |
| Grenzach-Wyhlen to Orleans | 268.28 mi (431.76 km) |
| Grenzach-Wyhlen to Orly | 256.31 mi (412.49 km) |
| Grenzach-Wyhlen to Ormesson-sur-Marne | 250.85 mi (403.70 km) |
| Grenzach-Wyhlen to Orsay | 264.43 mi (425.55 km) |
