| Cayce to Oerlinghausen | 4,404.10 mi (7,087.72 km) |
| Cayce to Oestrich-Winkel | 4,429.44 mi (7,128.50 km) |
| Cayce to Offenburg | 4,468.24 mi (7,190.93 km) |
| Cayce to Oftersheim | 4,470.55 mi (7,194.66 km) |
| Cayce to Ohrdruf | 4,517.00 mi (7,269.40 km) |
| Cayce to Ohringen | 4,513.05 mi (7,263.06 km) |
| Cayce to Olbernhau | 4,624.68 mi (7,442.71 km) |
| Cayce to Olching | 4,617.27 mi (7,430.77 km) |
| Cayce to Oldenburg | 4,356.11 mi (7,010.48 km) |
| Cayce to Oldenburg in Holstein | 4,427.11 mi (7,124.74 km) |
| Cayce to Olfen | 4,359.75 mi (7,016.34 km) |
| Cayce to Olpe | 4,395.80 mi (7,074.35 km) |
| Cayce to Olsberg | 4,413.08 mi (7,102.16 km) |
| Cayce to Oranienburg | 4,558.79 mi (7,336.66 km) |
| Cayce to Ortenberg | 4,462.79 mi (7,182.17 km) |
