| Del Rio to Oerlinghausen | 5,394.31 mi (8,681.30 km) |
| Del Rio to Oestrich-Winkel | 5,443.68 mi (8,760.76 km) |
| Del Rio to Offenburg | 5,498.69 mi (8,849.29 km) |
| Del Rio to Oftersheim | 5,489.30 mi (8,834.18 km) |
| Del Rio to Ohrdruf | 5,512.06 mi (8,870.81 km) |
| Del Rio to Ohringen | 5,530.18 mi (8,899.96 km) |
| Del Rio to Olbernhau | 5,611.07 mi (9,030.14 km) |
| Del Rio to Olching | 5,637.61 mi (9,072.86 km) |
| Del Rio to Oldenburg | 5,334.40 mi (8,584.89 km) |
| Del Rio to Oldenburg in Holstein | 5,381.87 mi (8,661.28 km) |
| Del Rio to Olfen | 5,357.37 mi (8,621.86 km) |
| Del Rio to Olpe | 5,399.61 mi (8,689.84 km) |
| Del Rio to Olsberg | 5,410.86 mi (8,707.94 km) |
| Del Rio to Oranienburg | 5,522.36 mi (8,887.38 km) |
| Del Rio to Ortenberg | 5,469.35 mi (8,802.06 km) |
