| Rockville Centre to Octeville | 3,426.03 mi (5,513.66 km) |
| Rockville Centre to Oignies | 3,600.11 mi (5,793.82 km) |
| Rockville Centre to Oissel | 3,548.28 mi (5,710.40 km) |
| Rockville Centre to Olivet | 3,619.72 mi (5,825.38 km) |
| Rockville Centre to Ollioules | 3,929.18 mi (6,323.40 km) |
| Rockville Centre to Olonne-sur-Mer | 3,492.87 mi (5,621.24 km) |
| Rockville Centre to Oloron-Sainte-Marie | 3,634.13 mi (5,848.56 km) |
| Rockville Centre to Onet Village | 3,746.13 mi (6,028.82 km) |
| Rockville Centre to Onnaing | 3,626.97 mi (5,837.04 km) |
| Rockville Centre to Orange | 3,851.96 mi (6,199.14 km) |
| Rockville Centre to Orchies | 3,610.28 mi (5,810.18 km) |
| Rockville Centre to Orleans | 3,619.08 mi (5,824.35 km) |
| Rockville Centre to Orly | 3,618.12 mi (5,822.81 km) |
| Rockville Centre to Ormesson-sur-Marne | 3,623.21 mi (5,831.00 km) |
| Rockville Centre to Orsay | 3,610.59 mi (5,810.68 km) |
