| Monroe to Opole | 5,287.83 mi (8,509.93 km) |
| Monroe to Orzesze | 5,337.87 mi (8,590.48 km) |
| Monroe to Osowa | 5,156.34 mi (8,298.32 km) |
| Monroe to Ostroda | 5,234.91 mi (8,424.77 km) |
| Monroe to Ostroleka | 5,313.91 mi (8,551.91 km) |
| Monroe to Ostrow Mazowiecka | 5,336.16 mi (8,587.71 km) |
| Monroe to Ostrow Wielkopolski | 5,244.45 mi (8,440.13 km) |
| Monroe to Ostrowiec Swietokrzyski | 5,398.36 mi (8,687.81 km) |
| Monroe to Ostrzeszow | 5,257.83 mi (8,461.66 km) |
| Monroe to Oswiecim | 5,359.29 mi (8,624.95 km) |
| Monroe to Otwock | 5,343.89 mi (8,600.15 km) |
| Monroe to Ozarow Mazowiecki | 5,323.97 mi (8,568.10 km) |
| Monroe to Ozimek | 5,297.54 mi (8,525.57 km) |
| Monroe to Ozorkow | 5,282.61 mi (8,501.53 km) |
| Monroe to Pabianice | 5,298.97 mi (8,527.87 km) |
