| Gurnee to Opole | 4,618.67 mi (7,433.02 km) |
| Gurnee to Orzesze | 4,669.14 mi (7,514.25 km) |
| Gurnee to Osowa | 4,473.05 mi (7,198.68 km) |
| Gurnee to Ostroda | 4,551.81 mi (7,325.43 km) |
| Gurnee to Ostroleka | 4,630.41 mi (7,451.92 km) |
| Gurnee to Ostrow Mazowiecka | 4,652.97 mi (7,488.24 km) |
| Gurnee to Ostrow Wielkopolski | 4,571.84 mi (7,357.66 km) |
| Gurnee to Ostrowiec Swietokrzyski | 4,722.03 mi (7,599.37 km) |
| Gurnee to Ostrzeszow | 4,585.87 mi (7,380.25 km) |
| Gurnee to Oswiecim | 4,690.09 mi (7,547.97 km) |
| Gurnee to Otwock | 4,663.87 mi (7,505.78 km) |
| Gurnee to Ozarow Mazowiecki | 4,644.39 mi (7,474.42 km) |
| Gurnee to Ozimek | 4,627.84 mi (7,447.79 km) |
| Gurnee to Ozorkow | 4,606.37 mi (7,413.23 km) |
| Gurnee to Pabianice | 4,623.67 mi (7,441.08 km) |
