| Johnston to Octeville | 4,195.01 mi (6,751.21 km) |
| Johnston to Oignies | 4,337.73 mi (6,980.90 km) |
| Johnston to Oissel | 4,309.51 mi (6,935.48 km) |
| Johnston to Olivet | 4,396.61 mi (7,075.66 km) |
| Johnston to Ollioules | 4,742.70 mi (7,632.63 km) |
| Johnston to Olonne-sur-Mer | 4,302.65 mi (6,924.44 km) |
| Johnston to Oloron-Sainte-Marie | 4,477.80 mi (7,206.32 km) |
| Johnston to Onet Village | 4,561.91 mi (7,341.69 km) |
| Johnston to Onnaing | 4,362.99 mi (7,021.55 km) |
| Johnston to Orange | 4,659.61 mi (7,498.91 km) |
| Johnston to Orchies | 4,346.70 mi (6,995.34 km) |
| Johnston to Orleans | 4,395.44 mi (7,073.78 km) |
| Johnston to Orly | 4,381.46 mi (7,051.27 km) |
| Johnston to Ormesson-sur-Marne | 4,385.34 mi (7,057.52 km) |
| Johnston to Orsay | 4,375.44 mi (7,041.60 km) |
