| Johnston to Oerlinghausen | 4,479.96 mi (7,209.79 km) |
| Johnston to Oestrich-Winkel | 4,537.42 mi (7,302.27 km) |
| Johnston to Offenburg | 4,598.61 mi (7,400.75 km) |
| Johnston to Oftersheim | 4,584.44 mi (7,377.94 km) |
| Johnston to Ohrdruf | 4,598.45 mi (7,400.49 km) |
| Johnston to Ohringen | 4,624.34 mi (7,442.16 km) |
| Johnston to Olbernhau | 4,694.03 mi (7,554.31 km) |
| Johnston to Olching | 4,732.18 mi (7,615.71 km) |
| Johnston to Oldenburg | 4,416.81 mi (7,108.17 km) |
| Johnston to Oldenburg in Holstein | 4,457.72 mi (7,174.00 km) |
| Johnston to Olfen | 4,445.76 mi (7,154.76 km) |
| Johnston to Olpe | 4,489.84 mi (7,225.70 km) |
| Johnston to Olsberg | 4,498.89 mi (7,240.27 km) |
| Johnston to Oranienburg | 4,599.56 mi (7,402.28 km) |
| Johnston to Ortenberg | 4,560.01 mi (7,338.63 km) |
