| Zwettl to Oignies | 560.25 mi (901.63 km) |
| Zwettl to Oissel | 639.58 mi (1,029.30 km) |
| Zwettl to Olivet | 612.00 mi (984.92 km) |
| Zwettl to Ollioules | 585.47 mi (942.22 km) |
| Zwettl to Olonne-sur-Mer | 800.84 mi (1,288.82 km) |
| Zwettl to Oloron-Sainte-Marie | 843.45 mi (1,357.40 km) |
| Zwettl to Onet Village | 664.97 mi (1,070.16 km) |
| Zwettl to Onnaing | 533.09 mi (857.93 km) |
| Zwettl to Orange | 581.54 mi (935.90 km) |
| Zwettl to Orchies | 549.42 mi (884.20 km) |
| Zwettl to Orleans | 611.17 mi (983.58 km) |
| Zwettl to Orly | 582.32 mi (937.15 km) |
| Zwettl to Ormesson-sur-Marne | 575.52 mi (926.20 km) |
| Zwettl to Orsay | 591.87 mi (952.53 km) |
| Zwettl to Orthez | 840.02 mi (1,351.89 km) |
