| Rockville Centre to Opole | 4,187.40 mi (6,738.96 km) |
| Rockville Centre to Orzesze | 4,236.36 mi (6,817.77 km) |
| Rockville Centre to Osowa | 4,082.32 mi (6,569.86 km) |
| Rockville Centre to Ostroda | 4,159.63 mi (6,694.28 km) |
| Rockville Centre to Ostroleka | 4,238.60 mi (6,821.37 km) |
| Rockville Centre to Ostrow Mazowiecka | 4,259.95 mi (6,855.73 km) |
| Rockville Centre to Ostrow Wielkopolski | 4,149.82 mi (6,678.49 km) |
| Rockville Centre to Ostrowiec Swietokrzyski | 4,308.51 mi (6,933.88 km) |
| Rockville Centre to Ostrzeszow | 4,162.02 mi (6,698.13 km) |
| Rockville Centre to Oswiecim | 4,258.30 mi (6,853.07 km) |
| Rockville Centre to Otwock | 4,261.30 mi (6,857.91 km) |
| Rockville Centre to Ozarow Mazowiecki | 4,240.77 mi (6,824.86 km) |
| Rockville Centre to Ozimek | 4,197.83 mi (6,755.76 km) |
| Rockville Centre to Ozorkow | 4,193.73 mi (6,749.15 km) |
| Rockville Centre to Pabianice | 4,208.31 mi (6,772.62 km) |
