| Grantsville to Oerlinghausen | 5,132.62 mi (8,260.15 km) |
| Grantsville to Oestrich-Winkel | 5,213.25 mi (8,389.91 km) |
| Grantsville to Offenburg | 5,289.43 mi (8,512.52 km) |
| Grantsville to Oftersheim | 5,263.00 mi (8,469.99 km) |
| Grantsville to Ohrdruf | 5,250.59 mi (8,450.01 km) |
| Grantsville to Ohringen | 5,299.26 mi (8,528.34 km) |
| Grantsville to Olbernhau | 5,332.23 mi (8,581.40 km) |
| Grantsville to Olching | 5,405.68 mi (8,699.60 km) |
| Grantsville to Oldenburg | 5,059.95 mi (8,143.21 km) |
| Grantsville to Oldenburg in Holstein | 5,074.09 mi (8,165.96 km) |
| Grantsville to Olfen | 5,108.03 mi (8,220.58 km) |
| Grantsville to Olpe | 5,156.63 mi (8,298.79 km) |
| Grantsville to Olsberg | 5,158.75 mi (8,302.21 km) |
| Grantsville to Oranienburg | 5,218.06 mi (8,397.65 km) |
| Grantsville to Ortenberg | 5,226.41 mi (8,411.10 km) |
