| Skokie to Octeville | 3,946.63 mi (6,351.49 km) |
| Skokie to Oignies | 4,097.91 mi (6,594.95 km) |
| Skokie to Oissel | 4,063.58 mi (6,539.70 km) |
| Skokie to Olivet | 4,147.12 mi (6,674.14 km) |
| Skokie to Ollioules | 4,485.25 mi (7,218.32 km) |
| Skokie to Olonne-sur-Mer | 4,044.59 mi (6,509.15 km) |
| Skokie to Oloron-Sainte-Marie | 4,212.01 mi (6,778.57 km) |
| Skokie to Onet Village | 4,303.30 mi (6,925.49 km) |
| Skokie to Onnaing | 4,123.69 mi (6,636.44 km) |
| Skokie to Orange | 4,403.37 mi (7,086.53 km) |
| Skokie to Orchies | 4,107.23 mi (6,609.94 km) |
| Skokie to Orleans | 4,146.08 mi (6,672.47 km) |
| Skokie to Orly | 4,135.32 mi (6,655.15 km) |
| Skokie to Ormesson-sur-Marne | 4,139.52 mi (6,661.92 km) |
| Skokie to Orsay | 4,128.89 mi (6,644.81 km) |
