| McCalla to Oerlinghausen | 4,669.51 mi (7,514.85 km) |
| McCalla to Oestrich-Winkel | 4,703.08 mi (7,568.88 km) |
| McCalla to Offenburg | 4,747.52 mi (7,640.40 km) |
| McCalla to Oftersheim | 4,745.86 mi (7,637.73 km) |
| McCalla to Ohrdruf | 4,784.47 mi (7,699.86 km) |
| McCalla to Ohringen | 4,787.96 mi (7,705.47 km) |
| McCalla to Olbernhau | 4,889.64 mi (7,869.12 km) |
| McCalla to Olching | 4,893.60 mi (7,875.48 km) |
| McCalla to Oldenburg | 4,617.31 mi (7,430.85 km) |
| McCalla to Oldenburg in Holstein | 4,680.71 mi (7,532.88 km) |
| McCalla to Olfen | 4,627.50 mi (7,447.24 km) |
| McCalla to Olpe | 4,665.78 mi (7,508.85 km) |
| McCalla to Olsberg | 4,681.08 mi (7,533.48 km) |
| McCalla to Oranienburg | 4,815.89 mi (7,750.43 km) |
| McCalla to Ortenberg | 4,733.94 mi (7,618.54 km) |
