| Reisterstown to Oerlinghausen | 3,969.50 mi (6,388.30 km) |
| Reisterstown to Oestrich-Winkel | 3,999.28 mi (6,436.21 km) |
| Reisterstown to Offenburg | 4,041.65 mi (6,504.41 km) |
| Reisterstown to Oftersheim | 4,041.41 mi (6,504.02 km) |
| Reisterstown to Ohrdruf | 4,083.47 mi (6,571.72 km) |
| Reisterstown to Ohringen | 4,083.68 mi (6,572.04 km) |
| Reisterstown to Olbernhau | 4,189.97 mi (6,743.11 km) |
| Reisterstown to Olching | 4,188.81 mi (6,741.24 km) |
| Reisterstown to Oldenburg | 3,919.55 mi (6,307.91 km) |
| Reisterstown to Oldenburg in Holstein | 3,987.59 mi (6,417.40 km) |
| Reisterstown to Olfen | 3,926.30 mi (6,318.77 km) |
| Reisterstown to Olpe | 3,963.54 mi (6,378.71 km) |
| Reisterstown to Olsberg | 3,979.78 mi (6,404.84 km) |
| Reisterstown to Oranienburg | 4,120.63 mi (6,631.52 km) |
| Reisterstown to Ortenberg | 4,031.21 mi (6,487.60 km) |
