| Gujan-Mestras to Oestrich-Winkel | 562.93 mi (905.95 km) |
| Gujan-Mestras to Offenburg | 502.41 mi (808.56 km) |
| Gujan-Mestras to Oftersheim | 559.48 mi (900.39 km) |
| Gujan-Mestras to Ohrdruf | 694.09 mi (1,117.03 km) |
| Gujan-Mestras to Ohringen | 589.19 mi (948.21 km) |
| Gujan-Mestras to Olbernhau | 787.15 mi (1,266.80 km) |
| Gujan-Mestras to Olching | 638.24 mi (1,027.15 km) |
| Gujan-Mestras to Oldenburg | 722.11 mi (1,162.12 km) |
| Gujan-Mestras to Oldenburg in Holstein | 854.18 mi (1,374.68 km) |
| Gujan-Mestras to Olfen | 624.36 mi (1,004.81 km) |
| Gujan-Mestras to Olpe | 603.14 mi (970.65 km) |
| Gujan-Mestras to Olsberg | 639.42 mi (1,029.05 km) |
| Gujan-Mestras to Oranienburg | 857.56 mi (1,380.11 km) |
| Gujan-Mestras to Ortenberg | 615.04 mi (989.81 km) |
| Gujan-Mestras to Oschatz | 799.03 mi (1,285.91 km) |
