| Saltcoats to Olympia Heights (Florida) | 4,213.01 mi (6,780.19 km) |
| Saltcoats to Omaha (Nebraska) | 3,983.43 mi (6,410.71 km) |
| Saltcoats to On Top of the World Designated Place (Florida) | 4,107.58 mi (6,610.52 km) |
| Saltcoats to Onalaska (Wisconsin) | 3,682.45 mi (5,926.33 km) |
| Saltcoats to Oneida (New York) | 3,155.04 mi (5,077.54 km) |
| Saltcoats to Oneonta (New York) | 3,161.29 mi (5,087.61 km) |
| Saltcoats to Ontario (California) | 5,092.13 mi (8,195.00 km) |
| Saltcoats to Ontario (Oregon) | 4,500.66 mi (7,243.12 km) |
| Saltcoats to Opa-locka (Florida) | 4,200.29 mi (6,759.71 km) |
| Saltcoats to Opelika (Alabama) | 4,038.73 mi (6,499.71 km) |
| Saltcoats to Opelousas (Louisiana) | 4,404.92 mi (7,089.04 km) |
| Saltcoats to Orange (California) | 5,112.50 mi (8,227.77 km) |
| Saltcoats to Orange (Texas) | 4,489.28 mi (7,224.80 km) |
| Saltcoats to Orange City (Florida) | 4,078.05 mi (6,562.99 km) |
| Saltcoats to Orangeburg (South Carolina) | 3,823.27 mi (6,152.96 km) |
