| Altamura to Olympia Heights (Florida) | 5,413.48 mi (8,712.16 km) |
| Altamura to Omaha (Nebraska) | 5,370.95 mi (8,643.71 km) |
| Altamura to On Top of the World Designated Place (Florida) | 5,355.02 mi (8,618.07 km) |
| Altamura to Onalaska (Wisconsin) | 5,066.89 mi (8,154.37 km) |
| Altamura to Oneida (New York) | 4,480.28 mi (7,210.32 km) |
| Altamura to Oneonta (New York) | 4,478.63 mi (7,207.66 km) |
| Altamura to Ontario (California) | 6,499.65 mi (10,460.18 km) |
| Altamura to Ontario (Oregon) | 5,903.29 mi (9,500.42 km) |
| Altamura to Opa-locka (Florida) | 5,401.71 mi (8,693.20 km) |
| Altamura to Opelika (Alabama) | 5,335.91 mi (8,587.32 km) |
| Altamura to Opelousas (Louisiana) | 5,727.36 mi (9,217.30 km) |
| Altamura to Orange (California) | 6,520.02 mi (10,492.97 km) |
| Altamura to Orange (Texas) | 5,818.63 mi (9,364.18 km) |
| Altamura to Orange City (Florida) | 5,316.27 mi (8,555.70 km) |
| Altamura to Orangeburg (South Carolina) | 5,098.12 mi (8,204.63 km) |
