| Skokie to Oerlinghausen | 4,252.89 mi (6,844.36 km) |
| Skokie to Oestrich-Winkel | 4,302.94 mi (6,924.92 km) |
| Skokie to Offenburg | 4,359.24 mi (7,015.52 km) |
| Skokie to Oftersheim | 4,348.82 mi (6,998.75 km) |
| Skokie to Ohrdruf | 4,370.65 mi (7,033.89 km) |
| Skokie to Ohringen | 4,389.54 mi (7,064.28 km) |
| Skokie to Olbernhau | 4,469.72 mi (7,193.32 km) |
| Skokie to Olching | 4,497.07 mi (7,237.34 km) |
| Skokie to Oldenburg | 4,193.14 mi (6,748.20 km) |
| Skokie to Oldenburg in Holstein | 4,241.91 mi (6,826.70 km) |
| Skokie to Olfen | 4,216.03 mi (6,785.05 km) |
| Skokie to Olpe | 4,258.42 mi (6,853.26 km) |
| Skokie to Olsberg | 4,269.51 mi (6,871.10 km) |
| Skokie to Oranienburg | 4,381.94 mi (7,052.05 km) |
| Skokie to Ortenberg | 4,328.21 mi (6,965.58 km) |
