| Gondomar to Oerlinghausen | 1,102.28 mi (1,773.95 km) |
| Gondomar to Oestrich-Winkel | 1,002.88 mi (1,613.98 km) |
| Gondomar to Offenburg | 949.41 mi (1,527.92 km) |
| Gondomar to Oftersheim | 1,004.12 mi (1,615.98 km) |
| Gondomar to Ohrdruf | 1,135.69 mi (1,827.72 km) |
| Gondomar to Ohringen | 1,035.62 mi (1,666.67 km) |
| Gondomar to Olbernhau | 1,232.83 mi (1,984.05 km) |
| Gondomar to Olching | 1,085.82 mi (1,747.46 km) |
| Gondomar to Oldenburg | 1,137.34 mi (1,830.37 km) |
| Gondomar to Oldenburg in Holstein | 1,272.43 mi (2,047.77 km) |
| Gondomar to Olfen | 1,048.10 mi (1,686.75 km) |
| Gondomar to Olpe | 1,035.05 mi (1,665.75 km) |
| Gondomar to Olsberg | 1,071.30 mi (1,724.09 km) |
| Gondomar to Oranienburg | 1,293.94 mi (2,082.40 km) |
| Gondomar to Ortenberg | 1,055.58 mi (1,698.78 km) |
