| Gelves to Oerlinghausen | 1,237.18 mi (1,991.04 km) |
| Gelves to Oestrich-Winkel | 1,117.17 mi (1,797.91 km) |
| Gelves to Offenburg | 1,040.90 mi (1,675.17 km) |
| Gelves to Oftersheim | 1,105.08 mi (1,778.46 km) |
| Gelves to Ohrdruf | 1,243.34 mi (2,000.96 km) |
| Gelves to Ohringen | 1,127.81 mi (1,815.04 km) |
| Gelves to Olbernhau | 1,324.18 mi (2,131.07 km) |
| Gelves to Olching | 1,151.40 mi (1,853.00 km) |
| Gelves to Oldenburg | 1,288.05 mi (2,072.92 km) |
| Gelves to Oldenburg in Holstein | 1,419.07 mi (2,283.78 km) |
| Gelves to Olfen | 1,188.86 mi (1,913.29 km) |
| Gelves to Olpe | 1,164.12 mi (1,873.47 km) |
| Gelves to Olsberg | 1,200.01 mi (1,931.23 km) |
| Gelves to Oranienburg | 1,411.78 mi (2,272.04 km) |
| Gelves to Ortenberg | 1,167.45 mi (1,878.83 km) |
