| Guimar to Oerlinghausen | 2,081.89 mi (3,350.48 km) |
| Guimar to Oestrich-Winkel | 1,970.58 mi (3,171.34 km) |
| Guimar to Offenburg | 1,901.13 mi (3,059.58 km) |
| Guimar to Oftersheim | 1,963.11 mi (3,159.32 km) |
| Guimar to Ohrdruf | 2,100.13 mi (3,379.83 km) |
| Guimar to Ohringen | 1,988.50 mi (3,200.18 km) |
| Guimar to Olbernhau | 2,186.16 mi (3,518.28 km) |
| Guimar to Olching | 2,016.89 mi (3,245.86 km) |
| Guimar to Oldenburg | 2,123.53 mi (3,417.49 km) |
| Guimar to Oldenburg in Holstein | 2,257.84 mi (3,633.65 km) |
| Guimar to Olfen | 2,029.96 mi (3,266.90 km) |
| Guimar to Olpe | 2,011.33 mi (3,236.92 km) |
| Guimar to Olsberg | 2,047.66 mi (3,295.40 km) |
| Guimar to Oranienburg | 2,265.66 mi (3,646.23 km) |
| Guimar to Ortenberg | 2,022.18 mi (3,254.39 km) |
