| Wilmette to Opole | 4,626.70 mi (7,445.95 km) |
| Wilmette to Orzesze | 4,677.14 mi (7,527.13 km) |
| Wilmette to Osowa | 4,482.36 mi (7,213.66 km) |
| Wilmette to Ostroda | 4,561.11 mi (7,340.40 km) |
| Wilmette to Ostroleka | 4,639.76 mi (7,466.98 km) |
| Wilmette to Ostrow Mazowiecka | 4,662.30 mi (7,503.24 km) |
| Wilmette to Ostrow Wielkopolski | 4,580.16 mi (7,371.06 km) |
| Wilmette to Ostrowiec Swietokrzyski | 4,730.71 mi (7,613.34 km) |
| Wilmette to Ostrzeszow | 4,594.14 mi (7,393.55 km) |
| Wilmette to Oswiecim | 4,698.14 mi (7,560.92 km) |
| Wilmette to Otwock | 4,672.89 mi (7,520.29 km) |
| Wilmette to Ozarow Mazowiecki | 4,653.36 mi (7,488.86 km) |
| Wilmette to Ozimek | 4,635.92 mi (7,460.79 km) |
| Wilmette to Ozorkow | 4,615.02 mi (7,427.16 km) |
| Wilmette to Pabianice | 4,632.24 mi (7,454.88 km) |
