| Merced to Orbetello | 6,144.93 mi (9,889.30 km) |
| Merced to Oria | 6,442.81 mi (10,368.70 km) |
| Merced to Oristano | 6,201.59 mi (9,980.49 km) |
| Merced to Orta Nova | 6,340.22 mi (10,203.60 km) |
| Merced to Orte | 6,178.97 mi (9,944.10 km) |
| Merced to Ortona | 6,244.13 mi (10,048.96 km) |
| Merced to Orvieto | 6,156.31 mi (9,907.62 km) |
| Merced to Orzinuovi | 5,943.13 mi (9,564.55 km) |
| Merced to Osimo | 6,153.34 mi (9,902.84 km) |
| Merced to Ospitaletto | 5,938.72 mi (9,557.44 km) |
| Merced to Ostuni | 6,427.76 mi (10,344.49 km) |
| Merced to Ottaviano | 6,332.02 mi (10,190.39 km) |
| Merced to Ovada | 5,946.15 mi (9,569.41 km) |
| Merced to Ozieri | 6,177.98 mi (9,942.50 km) |
| Merced to Paceco | 6,435.45 mi (10,356.85 km) |
