| Alamo to Orbetello | 5,907.27 mi (9,506.84 km) |
| Alamo to Oria | 6,257.71 mi (10,070.81 km) |
| Alamo to Oristano | 5,881.01 mi (9,464.58 km) |
| Alamo to Orta Nova | 6,142.68 mi (9,885.68 km) |
| Alamo to Orte | 5,957.12 mi (9,587.05 km) |
| Alamo to Ortona | 6,047.21 mi (9,732.04 km) |
| Alamo to Orvieto | 5,935.71 mi (9,552.60 km) |
| Alamo to Orzinuovi | 5,746.58 mi (9,248.22 km) |
| Alamo to Osimo | 5,965.24 mi (9,600.12 km) |
| Alamo to Ospitaletto | 5,746.91 mi (9,248.76 km) |
| Alamo to Ostuni | 6,246.10 mi (10,052.13 km) |
| Alamo to Ottaviano | 6,108.44 mi (9,830.59 km) |
| Alamo to Ovada | 5,718.93 mi (9,203.72 km) |
| Alamo to Ozieri | 5,875.92 mi (9,456.38 km) |
| Alamo to Paceco | 6,131.75 mi (9,868.10 km) |
