| Carlsbad to Oerlinghausen | 5,712.30 mi (9,193.06 km) |
| Carlsbad to Oestrich-Winkel | 5,791.35 mi (9,320.27 km) |
| Carlsbad to Offenburg | 5,866.23 mi (9,440.79 km) |
| Carlsbad to Oftersheim | 5,840.94 mi (9,400.08 km) |
| Carlsbad to Ohrdruf | 5,830.43 mi (9,383.17 km) |
| Carlsbad to Ohringen | 5,877.55 mi (9,459.01 km) |
| Carlsbad to Olbernhau | 5,912.84 mi (9,515.79 km) |
| Carlsbad to Olching | 5,984.23 mi (9,630.69 km) |
| Carlsbad to Oldenburg | 5,640.09 mi (9,076.85 km) |
| Carlsbad to Oldenburg in Holstein | 5,655.25 mi (9,101.24 km) |
| Carlsbad to Olfen | 5,687.05 mi (9,152.42 km) |
| Carlsbad to Olpe | 5,735.38 mi (9,230.20 km) |
| Carlsbad to Olsberg | 5,738.00 mi (9,234.43 km) |
| Carlsbad to Oranienburg | 5,799.23 mi (9,332.96 km) |
| Carlsbad to Ortenberg | 5,805.28 mi (9,342.70 km) |
