| Slawno to Olympia Heights (Florida) | 5,059.30 mi (8,142.15 km) |
| Slawno to Omaha (Nebraska) | 4,731.88 mi (7,615.23 km) |
| Slawno to On Top of the World Designated Place (Florida) | 4,945.63 mi (7,959.22 km) |
| Slawno to Onalaska (Wisconsin) | 4,439.28 mi (7,144.33 km) |
| Slawno to Oneida (New York) | 3,971.06 mi (6,390.81 km) |
| Slawno to Oneonta (New York) | 3,981.30 mi (6,407.29 km) |
| Slawno to Ontario (California) | 5,751.07 mi (9,255.46 km) |
| Slawno to Ontario (Oregon) | 5,113.12 mi (8,228.77 km) |
| Slawno to Opa-locka (Florida) | 5,046.48 mi (8,121.52 km) |
| Slawno to Opelika (Alabama) | 4,861.25 mi (7,823.42 km) |
| Slawno to Opelousas (Louisiana) | 5,212.50 mi (8,388.70 km) |
| Slawno to Orange (California) | 5,771.02 mi (9,287.56 km) |
| Slawno to Orange (Texas) | 5,292.08 mi (8,516.79 km) |
| Slawno to Orange City (Florida) | 4,918.32 mi (7,915.27 km) |
| Slawno to Orangeburg (South Carolina) | 4,655.25 mi (7,491.90 km) |
