| Modra to Olympia Heights (Florida) | 5,240.48 mi (8,433.74 km) |
| Modra to Omaha (Nebraska) | 5,035.02 mi (8,103.08 km) |
| Modra to On Top of the World Designated Place (Florida) | 5,150.34 mi (8,288.66 km) |
| Modra to Onalaska (Wisconsin) | 4,736.28 mi (7,622.30 km) |
| Modra to Oneida (New York) | 4,213.74 mi (6,781.36 km) |
| Modra to Oneonta (New York) | 4,218.77 mi (6,789.46 km) |
| Modra to Ontario (California) | 6,102.89 mi (9,821.65 km) |
| Modra to Ontario (Oregon) | 5,480.21 mi (8,819.55 km) |
| Modra to Opa-locka (Florida) | 5,228.04 mi (8,413.72 km) |
| Modra to Opelika (Alabama) | 5,093.99 mi (8,197.99 km) |
| Modra to Opelousas (Louisiana) | 5,464.51 mi (8,794.28 km) |
| Modra to Orange (California) | 6,123.05 mi (9,854.10 km) |
| Modra to Orange (Texas) | 5,549.51 mi (8,931.08 km) |
| Modra to Orange City (Florida) | 5,117.84 mi (8,236.37 km) |
| Modra to Orangeburg (South Carolina) | 4,872.89 mi (7,842.16 km) |
