| Rostusa to Olympia Heights (Florida) | 5,580.64 mi (8,981.17 km) |
| Rostusa to Omaha (Nebraska) | 5,478.41 mi (8,816.66 km) |
| Rostusa to On Top of the World Designated Place (Florida) | 5,512.70 mi (8,871.83 km) |
| Rostusa to Onalaska (Wisconsin) | 5,176.40 mi (8,330.62 km) |
| Rostusa to Oneida (New York) | 4,615.33 mi (7,427.66 km) |
| Rostusa to Oneonta (New York) | 4,616.14 mi (7,428.96 km) |
| Rostusa to Ontario (California) | 6,575.99 mi (10,583.04 km) |
| Rostusa to Ontario (Oregon) | 5,962.23 mi (9,595.28 km) |
| Rostusa to Opa-locka (Florida) | 5,568.65 mi (8,961.88 km) |
| Rostusa to Opelika (Alabama) | 5,481.32 mi (8,821.34 km) |
| Rostusa to Opelousas (Louisiana) | 5,865.88 mi (9,440.22 km) |
| Rostusa to Orange (California) | 6,596.26 mi (10,615.65 km) |
| Rostusa to Orange (Texas) | 5,954.93 mi (9,583.54 km) |
| Rostusa to Orange City (Florida) | 5,475.81 mi (8,812.46 km) |
| Rostusa to Orangeburg (South Carolina) | 5,248.79 mi (8,447.11 km) |
