| Chicago to Orthez | 4,199.65 mi (6,758.69 km) |
| Chicago to Orvault | 4,031.83 mi (6,488.60 km) |
| Chicago to Osny | 4,118.13 mi (6,627.49 km) |
| Chicago to Ostwald | 4,354.84 mi (7,008.44 km) |
| Chicago to Ouistreham | 4,019.43 mi (6,468.65 km) |
| Chicago to Oullins | 4,349.02 mi (6,999.07 km) |
| Chicago to Outreau | 4,043.71 mi (6,507.72 km) |
| Chicago to Oyonnax | 4,362.39 mi (7,020.59 km) |
| Chicago to Ozoir-la-Ferriere | 4,152.15 mi (6,682.24 km) |
| Chicago to Pace | 3,996.41 mi (6,431.60 km) |
| Chicago to Palaiseau | 4,137.36 mi (6,658.44 km) |
| Chicago to Pamiers | 4,314.68 mi (6,943.81 km) |
| Chicago to Panazol | 4,202.05 mi (6,762.55 km) |
| Chicago to Pantin | 4,137.09 mi (6,658.00 km) |
| Chicago to Paray-le-Monial | 4,293.65 mi (6,909.96 km) |
