| West Chicago to Orthez | 4,220.37 mi (6,792.03 km) |
| West Chicago to Orvault | 4,051.38 mi (6,520.07 km) |
| West Chicago to Osny | 4,136.53 mi (6,657.10 km) |
| West Chicago to Ostwald | 4,372.58 mi (7,036.98 km) |
| West Chicago to Ouistreham | 4,038.07 mi (6,498.64 km) |
| West Chicago to Oullins | 4,368.18 mi (7,029.91 km) |
| West Chicago to Outreau | 4,061.55 mi (6,536.44 km) |
| West Chicago to Oyonnax | 4,381.24 mi (7,050.93 km) |
| West Chicago to Ozoir-la-Ferriere | 4,170.56 mi (6,711.87 km) |
| West Chicago to Pace | 4,015.67 mi (6,462.60 km) |
| West Chicago to Palaiseau | 4,155.86 mi (6,688.21 km) |
| West Chicago to Pamiers | 4,335.17 mi (6,976.79 km) |
| West Chicago to Panazol | 4,221.70 mi (6,794.17 km) |
| West Chicago to Pantin | 4,155.49 mi (6,687.62 km) |
| West Chicago to Paray-le-Monial | 4,312.67 mi (6,940.57 km) |
