| Crystal Lake to Oerlinghausen | 4,264.30 mi (6,862.72 km) |
| Crystal Lake to Oestrich-Winkel | 4,315.50 mi (6,945.13 km) |
| Crystal Lake to Offenburg | 4,372.59 mi (7,037.00 km) |
| Crystal Lake to Oftersheim | 4,361.57 mi (7,019.27 km) |
| Crystal Lake to Ohrdruf | 4,382.20 mi (7,052.47 km) |
| Crystal Lake to Ohringen | 4,402.17 mi (7,084.60 km) |
| Crystal Lake to Olbernhau | 4,480.76 mi (7,211.09 km) |
| Crystal Lake to Olching | 4,509.77 mi (7,257.78 km) |
| Crystal Lake to Oldenburg | 4,204.02 mi (6,765.71 km) |
| Crystal Lake to Oldenburg in Holstein | 4,251.63 mi (6,842.34 km) |
| Crystal Lake to Olfen | 4,227.84 mi (6,804.05 km) |
| Crystal Lake to Olpe | 4,270.49 mi (6,872.70 km) |
| Crystal Lake to Olsberg | 4,281.27 mi (6,890.04 km) |
| Crystal Lake to Oranienburg | 4,391.96 mi (7,068.18 km) |
| Crystal Lake to Ortenberg | 4,340.36 mi (6,985.13 km) |
