| Chicago to Noventa Vicentina | 4,632.44 mi (7,455.19 km) |
| Chicago to Novi di Modena | 4,623.95 mi (7,441.52 km) |
| Chicago to Novi Ligure | 4,545.85 mi (7,315.84 km) |
| Chicago to Nuoro | 4,751.42 mi (7,646.67 km) |
| Chicago to Occhiobello | 4,649.37 mi (7,482.44 km) |
| Chicago to Oderzo | 4,648.68 mi (7,481.32 km) |
| Chicago to Oggiono | 4,526.85 mi (7,285.26 km) |
| Chicago to Olbia | 4,733.15 mi (7,617.27 km) |
| Chicago to Oleggio | 4,506.04 mi (7,251.78 km) |
| Chicago to Olgiate Comasco | 4,511.82 mi (7,261.08 km) |
| Chicago to Olgiate Olona | 4,514.56 mi (7,265.48 km) |
| Chicago to Omegna | 4,486.04 mi (7,219.59 km) |
| Chicago to Opera | 4,537.74 mi (7,302.79 km) |
| Chicago to Oppeano | 4,618.14 mi (7,432.18 km) |
| Chicago to Orbassano | 4,486.08 mi (7,219.65 km) |
