| Fostoria to Oerlinghausen | 4,138.38 mi (6,660.08 km) |
| Fostoria to Oestrich-Winkel | 4,180.90 mi (6,728.51 km) |
| Fostoria to Offenburg | 4,232.09 mi (6,810.89 km) |
| Fostoria to Oftersheim | 4,225.48 mi (6,800.26 km) |
| Fostoria to Ohrdruf | 4,255.03 mi (6,847.81 km) |
| Fostoria to Ohringen | 4,266.90 mi (6,866.90 km) |
| Fostoria to Olbernhau | 4,357.18 mi (7,012.21 km) |
| Fostoria to Olching | 4,373.80 mi (7,038.94 km) |
| Fostoria to Oldenburg | 4,082.16 mi (6,569.61 km) |
| Fostoria to Oldenburg in Holstein | 4,138.38 mi (6,660.08 km) |
| Fostoria to Olfen | 4,099.02 mi (6,596.73 km) |
| Fostoria to Olpe | 4,139.58 mi (6,662.01 km) |
| Fostoria to Olsberg | 4,152.64 mi (6,683.04 km) |
| Fostoria to Oranienburg | 4,276.16 mi (6,881.82 km) |
| Fostoria to Ortenberg | 4,208.75 mi (6,773.33 km) |
