| Houma to Oerlinghausen | 5,005.74 mi (8,055.96 km) |
| Houma to Oestrich-Winkel | 5,038.99 mi (8,109.48 km) |
| Houma to Offenburg | 5,082.94 mi (8,180.20 km) |
| Houma to Oftersheim | 5,081.65 mi (8,178.13 km) |
| Houma to Ohrdruf | 5,120.66 mi (8,240.91 km) |
| Houma to Ohringen | 5,123.79 mi (8,245.94 km) |
| Houma to Olbernhau | 5,225.88 mi (8,410.24 km) |
| Houma to Olching | 5,229.32 mi (8,415.78 km) |
| Houma to Oldenburg | 4,953.53 mi (7,971.94 km) |
| Houma to Oldenburg in Holstein | 5,016.65 mi (8,073.53 km) |
| Houma to Olfen | 4,963.68 mi (7,988.27 km) |
| Houma to Olpe | 5,001.89 mi (8,049.76 km) |
| Houma to Olsberg | 5,017.26 mi (8,074.50 km) |
| Houma to Oranienburg | 5,151.99 mi (8,291.32 km) |
| Houma to Ortenberg | 5,070.00 mi (8,159.37 km) |
