| Altdorf to Olympia Heights (Florida) | 4,896.30 mi (7,879.83 km) |
| Altdorf to Omaha (Nebraska) | 4,798.66 mi (7,722.69 km) |
| Altdorf to On Top of the World Designated Place (Florida) | 4,822.35 mi (7,760.82 km) |
| Altdorf to Onalaska (Wisconsin) | 4,495.08 mi (7,234.13 km) |
| Altdorf to Oneida (New York) | 3,922.18 mi (6,312.14 km) |
| Altdorf to Oneonta (New York) | 3,922.64 mi (6,312.89 km) |
| Altdorf to Ontario (California) | 5,926.89 mi (9,538.40 km) |
| Altdorf to Ontario (Oregon) | 5,336.47 mi (8,588.22 km) |
| Altdorf to Opa-locka (Florida) | 4,884.16 mi (7,860.29 km) |
| Altdorf to Opelika (Alabama) | 4,787.72 mi (7,705.10 km) |
| Altdorf to Opelousas (Louisiana) | 5,172.39 mi (8,324.15 km) |
| Altdorf to Orange (California) | 5,947.27 mi (9,571.21 km) |
| Altdorf to Orange (Texas) | 5,261.76 mi (8,467.98 km) |
| Altdorf to Orange City (Florida) | 4,786.40 mi (7,702.97 km) |
| Altdorf to Orangeburg (South Carolina) | 4,556.07 mi (7,332.29 km) |
