| Birkerod to Olympia Heights (Florida) | 4,867.51 mi (7,833.50 km) |
| Birkerod to Omaha (Nebraska) | 4,538.06 mi (7,303.30 km) |
| Birkerod to On Top of the World Designated Place (Florida) | 4,751.62 mi (7,647.00 km) |
| Birkerod to Onalaska (Wisconsin) | 4,244.76 mi (6,831.29 km) |
| Birkerod to Oneida (New York) | 3,775.15 mi (6,075.51 km) |
| Birkerod to Oneonta (New York) | 3,785.58 mi (6,092.30 km) |
| Birkerod to Ontario (California) | 5,567.15 mi (8,959.46 km) |
| Birkerod to Ontario (Oregon) | 4,934.45 mi (7,941.23 km) |
| Birkerod to Opa-locka (Florida) | 4,854.66 mi (7,812.82 km) |
| Birkerod to Opelika (Alabama) | 4,665.54 mi (7,508.46 km) |
| Birkerod to Opelousas (Louisiana) | 5,016.31 mi (8,072.98 km) |
| Birkerod to Orange (California) | 5,587.17 mi (8,991.69 km) |
| Birkerod to Orange (Texas) | 5,095.91 mi (8,201.07 km) |
| Birkerod to Orange City (Florida) | 4,724.76 mi (7,603.77 km) |
| Birkerod to Orangeburg (South Carolina) | 4,460.40 mi (7,178.32 km) |
