| Chicago to Nasaud | 5,012.29 mi (8,066.50 km) |
| Chicago to Navodari | 5,300.21 mi (8,529.86 km) |
| Chicago to Negresti-Oas | 4,951.19 mi (7,968.17 km) |
| Chicago to Nehoiu | 5,170.31 mi (8,320.81 km) |
| Chicago to Ocna Mures | 5,036.13 mi (8,104.86 km) |
| Chicago to Odobesti | 5,175.89 mi (8,329.80 km) |
| Chicago to Odorheiu Secuiesc | 5,089.27 mi (8,190.39 km) |
| Chicago to Oltenita | 5,244.02 mi (8,439.43 km) |
| Chicago to Onesti | 5,141.68 mi (8,274.73 km) |
| Chicago to Oradea | 4,936.77 mi (7,944.97 km) |
| Chicago to Orastie | 5,038.79 mi (8,109.15 km) |
| Chicago to Oravita | 5,023.13 mi (8,083.95 km) |
| Chicago to Orsova | 5,063.45 mi (8,148.83 km) |
| Chicago to Otelu Rosu | 5,024.55 mi (8,086.23 km) |
| Chicago to Otopeni | 5,201.56 mi (8,371.10 km) |
