| West Chicago to Oschatz | 4,460.05 mi (7,177.75 km) |
| West Chicago to Oschersleben | 4,366.49 mi (7,027.19 km) |
| West Chicago to Osnabruck | 4,243.33 mi (6,828.98 km) |
| West Chicago to Ostbevern | 4,245.13 mi (6,831.87 km) |
| West Chicago to Osterburg | 4,354.29 mi (7,007.55 km) |
| West Chicago to Ostercappeln | 4,247.36 mi (6,835.47 km) |
| West Chicago to Osterhofen | 4,563.81 mi (7,344.74 km) |
| West Chicago to Osterholz-Scharmbeck | 4,235.01 mi (6,815.58 km) |
| West Chicago to Osternienburg | 4,401.85 mi (7,084.10 km) |
| West Chicago to Osterode | 4,342.62 mi (6,988.78 km) |
| West Chicago to Osterwieck | 4,349.75 mi (7,000.24 km) |
| West Chicago to Ostfildern | 4,423.33 mi (7,118.66 km) |
| West Chicago to Osthofen | 4,351.02 mi (7,002.29 km) |
| West Chicago to Ostrhauderfehn | 4,197.25 mi (6,754.83 km) |
| West Chicago to Ostringen | 4,384.14 mi (7,055.59 km) |
