| Fairmount to Oerlinghausen | 3,781.12 mi (6,085.12 km) |
| Fairmount to Oestrich-Winkel | 3,817.75 mi (6,144.08 km) |
| Fairmount to Offenburg | 3,865.16 mi (6,220.37 km) |
| Fairmount to Oftersheim | 3,861.29 mi (6,214.15 km) |
| Fairmount to Ohrdruf | 3,896.62 mi (6,271.00 km) |
| Fairmount to Ohringen | 3,903.13 mi (6,281.47 km) |
| Fairmount to Olbernhau | 4,000.98 mi (6,438.95 km) |
| Fairmount to Olching | 4,009.36 mi (6,452.44 km) |
| Fairmount to Oldenburg | 3,727.92 mi (5,999.50 km) |
| Fairmount to Oldenburg in Holstein | 3,790.30 mi (6,099.90 km) |
| Fairmount to Olfen | 3,739.87 mi (6,018.75 km) |
| Fairmount to Olpe | 3,778.93 mi (6,081.60 km) |
| Fairmount to Olsberg | 3,793.50 mi (6,105.04 km) |
| Fairmount to Oranienburg | 3,925.76 mi (6,317.90 km) |
| Fairmount to Ortenberg | 3,847.48 mi (6,191.93 km) |
