| Elk River to Opole | 4,646.26 mi (7,477.44 km) |
| Elk River to Orzesze | 4,696.94 mi (7,558.99 km) |
| Elk River to Osowa | 4,480.61 mi (7,210.84 km) |
| Elk River to Ostroda | 4,559.08 mi (7,337.13 km) |
| Elk River to Ostroleka | 4,636.44 mi (7,461.64 km) |
| Elk River to Ostrow Mazowiecka | 4,659.36 mi (7,498.52 km) |
| Elk River to Ostrow Wielkopolski | 4,594.95 mi (7,394.86 km) |
| Elk River to Ostrowiec Swietokrzyski | 4,738.58 mi (7,626.01 km) |
| Elk River to Ostrzeszow | 4,609.81 mi (7,418.77 km) |
| Elk River to Oswiecim | 4,717.08 mi (7,591.41 km) |
| Elk River to Otwock | 4,675.24 mi (7,524.08 km) |
| Elk River to Ozarow Mazowiecki | 4,656.57 mi (7,494.03 km) |
| Elk River to Ozimek | 4,654.63 mi (7,490.90 km) |
| Elk River to Ozorkow | 4,623.92 mi (7,441.49 km) |
| Elk River to Pabianice | 4,642.48 mi (7,471.36 km) |
