| Chicago Heights to Nyon | 4,392.87 mi (7,069.64 km) |
| Chicago Heights to Oberriet | 4,486.96 mi (7,221.07 km) |
| Chicago Heights to Obersiggenthal | 4,431.18 mi (7,131.30 km) |
| Chicago Heights to Oberwil | 4,401.59 mi (7,083.68 km) |
| Chicago Heights to Oberwingert | 4,448.41 mi (7,159.03 km) |
| Chicago Heights to Oftringen | 4,423.23 mi (7,118.49 km) |
| Chicago Heights to Olten | 4,421.29 mi (7,115.38 km) |
| Chicago Heights to Onex | 4,395.18 mi (7,073.35 km) |
| Chicago Heights to Opfikon | 4,443.87 mi (7,151.72 km) |
| Chicago Heights to Ostermundigen | 4,420.52 mi (7,114.14 km) |
| Chicago Heights to Payerne | 4,404.01 mi (7,087.56 km) |
| Chicago Heights to Pfaffikon | 4,454.83 mi (7,169.36 km) |
| Chicago Heights to Plan-les-Ouates | 4,396.48 mi (7,075.45 km) |
| Chicago Heights to Pratteln | 4,407.11 mi (7,092.56 km) |
| Chicago Heights to Prilly | 4,401.69 mi (7,083.84 km) |
