| Chicago Heights to Nasaud | 5,027.55 mi (8,091.06 km) |
| Chicago Heights to Navodari | 5,315.46 mi (8,554.41 km) |
| Chicago Heights to Negresti-Oas | 4,966.44 mi (7,992.71 km) |
| Chicago Heights to Nehoiu | 5,185.42 mi (8,345.13 km) |
| Chicago Heights to Ocna Mures | 5,051.10 mi (8,128.96 km) |
| Chicago Heights to Odobesti | 5,191.21 mi (8,354.45 km) |
| Chicago Heights to Odorheiu Secuiesc | 5,104.44 mi (8,214.81 km) |
| Chicago Heights to Oltenita | 5,258.90 mi (8,463.39 km) |
| Chicago Heights to Onesti | 5,157.05 mi (8,299.48 km) |
| Chicago Heights to Oradea | 4,951.62 mi (7,968.86 km) |
| Chicago Heights to Orastie | 5,053.54 mi (8,132.89 km) |
| Chicago Heights to Oravita | 5,037.46 mi (8,107.01 km) |
| Chicago Heights to Orsova | 5,077.81 mi (8,171.95 km) |
| Chicago Heights to Otelu Rosu | 5,039.09 mi (8,109.64 km) |
| Chicago Heights to Otopeni | 5,216.46 mi (8,395.07 km) |
