| Oconomowoc to Opole | 4,599.65 mi (7,402.42 km) |
| Oconomowoc to Orzesze | 4,650.19 mi (7,483.75 km) |
| Oconomowoc to Osowa | 4,450.82 mi (7,162.90 km) |
| Oconomowoc to Ostroda | 4,529.58 mi (7,289.66 km) |
| Oconomowoc to Ostroleka | 4,608.04 mi (7,415.92 km) |
| Oconomowoc to Ostrow Mazowiecka | 4,630.67 mi (7,452.34 km) |
| Oconomowoc to Ostrow Wielkopolski | 4,552.09 mi (7,325.88 km) |
| Oconomowoc to Ostrowiec Swietokrzyski | 4,701.34 mi (7,566.07 km) |
| Oconomowoc to Ostrzeszow | 4,566.26 mi (7,348.68 km) |
| Oconomowoc to Oswiecim | 4,671.02 mi (7,517.28 km) |
| Oconomowoc to Otwock | 4,642.34 mi (7,471.13 km) |
| Oconomowoc to Ozarow Mazowiecki | 4,622.97 mi (7,439.95 km) |
| Oconomowoc to Ozimek | 4,608.70 mi (7,416.99 km) |
| Oconomowoc to Ozorkow | 4,585.76 mi (7,380.07 km) |
| Oconomowoc to Pabianice | 4,603.28 mi (7,408.26 km) |
