| Schwelm to Olympia Heights (Florida) | 4,751.48 mi (7,646.77 km) |
| Schwelm to Omaha (Nebraska) | 4,562.88 mi (7,343.25 km) |
| Schwelm to On Top of the World Designated Place (Florida) | 4,659.42 mi (7,498.61 km) |
| Schwelm to Onalaska (Wisconsin) | 4,261.95 mi (6,858.95 km) |
| Schwelm to Oneida (New York) | 3,724.94 mi (5,994.71 km) |
| Schwelm to Oneonta (New York) | 3,729.29 mi (6,001.71 km) |
| Schwelm to Ontario (California) | 5,661.54 mi (9,111.37 km) |
| Schwelm to Ontario (Oregon) | 5,057.84 mi (8,139.81 km) |
| Schwelm to Opa-locka (Florida) | 4,738.99 mi (7,626.66 km) |
| Schwelm to Opelika (Alabama) | 4,603.62 mi (7,408.81 km) |
| Schwelm to Opelousas (Louisiana) | 4,976.20 mi (8,008.43 km) |
| Schwelm to Orange (California) | 5,681.85 mi (9,144.06 km) |
| Schwelm to Orange (Texas) | 5,062.07 mi (8,146.61 km) |
| Schwelm to Orange City (Florida) | 4,627.16 mi (7,446.69 km) |
| Schwelm to Orangeburg (South Carolina) | 4,381.84 mi (7,051.90 km) |
