| Mount Vernon to Opole | 4,182.84 mi (6,731.63 km) |
| Mount Vernon to Orzesze | 4,231.88 mi (6,810.55 km) |
| Mount Vernon to Osowa | 4,076.43 mi (6,560.37 km) |
| Mount Vernon to Ostroda | 4,153.81 mi (6,684.92 km) |
| Mount Vernon to Ostroleka | 4,232.81 mi (6,812.06 km) |
| Mount Vernon to Ostrow Mazowiecka | 4,254.21 mi (6,846.49 km) |
| Mount Vernon to Ostrow Wielkopolski | 4,144.95 mi (6,670.64 km) |
| Mount Vernon to Ostrowiec Swietokrzyski | 4,303.44 mi (6,925.71 km) |
| Mount Vernon to Ostrzeszow | 4,157.21 mi (6,690.38 km) |
| Mount Vernon to Oswiecim | 4,253.79 mi (6,845.81 km) |
| Mount Vernon to Otwock | 4,255.86 mi (6,849.15 km) |
| Mount Vernon to Ozarow Mazowiecki | 4,235.35 mi (6,816.14 km) |
| Mount Vernon to Ozimek | 4,193.24 mi (6,748.36 km) |
| Mount Vernon to Ozorkow | 4,188.57 mi (6,740.85 km) |
| Mount Vernon to Pabianice | 4,203.25 mi (6,764.47 km) |
