| Darby to Oerlinghausen | 3,887.09 mi (6,255.67 km) |
| Darby to Oestrich-Winkel | 3,915.60 mi (6,301.55 km) |
| Darby to Offenburg | 3,957.16 mi (6,368.43 km) |
| Darby to Oftersheim | 3,957.49 mi (6,368.96 km) |
| Darby to Ohrdruf | 4,000.73 mi (6,438.56 km) |
| Darby to Ohringen | 3,999.82 mi (6,437.08 km) |
| Darby to Olbernhau | 4,107.62 mi (6,610.57 km) |
| Darby to Olching | 4,104.75 mi (6,605.95 km) |
| Darby to Oldenburg | 3,837.82 mi (6,176.37 km) |
| Darby to Oldenburg in Holstein | 3,907.11 mi (6,287.89 km) |
| Darby to Olfen | 3,843.52 mi (6,185.55 km) |
| Darby to Olpe | 3,880.42 mi (6,244.93 km) |
| Darby to Olsberg | 3,896.96 mi (6,271.56 km) |
| Darby to Oranienburg | 4,039.55 mi (6,501.03 km) |
| Darby to Ortenberg | 3,947.90 mi (6,353.54 km) |
