| River Edge to Orbetello | 4,199.21 mi (6,757.98 km) |
| River Edge to Oria | 4,551.70 mi (7,325.25 km) |
| River Edge to Oristano | 4,170.22 mi (6,711.31 km) |
| River Edge to Orta Nova | 4,436.35 mi (7,139.62 km) |
| River Edge to Orte | 4,249.95 mi (6,839.64 km) |
| River Edge to Ortona | 4,341.61 mi (6,987.15 km) |
| River Edge to Orvieto | 4,228.78 mi (6,805.56 km) |
| River Edge to Orzinuovi | 4,043.55 mi (6,507.46 km) |
| River Edge to Osimo | 4,261.20 mi (6,857.74 km) |
| River Edge to Ospitaletto | 4,044.45 mi (6,508.91 km) |
| River Edge to Ostuni | 4,540.49 mi (7,307.21 km) |
| River Edge to Ottaviano | 4,400.30 mi (7,081.60 km) |
| River Edge to Ovada | 4,012.89 mi (6,458.12 km) |
| River Edge to Ozieri | 4,165.23 mi (6,703.29 km) |
| River Edge to Paceco | 4,420.96 mi (7,114.84 km) |
