| Diessen am Ammersee to Olympia Heights (Florida) | 4,982.50 mi (8,018.55 km) |
| Diessen am Ammersee to Omaha (Nebraska) | 4,839.80 mi (7,788.91 km) |
| Diessen am Ammersee to On Top of the World Designated Place (Florida) | 4,901.18 mi (7,887.69 km) |
| Diessen am Ammersee to Onalaska (Wisconsin) | 4,537.79 mi (7,302.87 km) |
| Diessen am Ammersee to Oneida (New York) | 3,984.65 mi (6,412.68 km) |
| Diessen am Ammersee to Oneonta (New York) | 3,987.04 mi (6,416.53 km) |
| Diessen am Ammersee to Ontario (California) | 5,946.66 mi (9,570.22 km) |
| Diessen am Ammersee to Ontario (Oregon) | 5,344.07 mi (8,600.44 km) |
| Diessen am Ammersee to Opa-locka (Florida) | 4,970.21 mi (7,998.78 km) |
| Diessen am Ammersee to Opelika (Alabama) | 4,857.11 mi (7,816.76 km) |
| Diessen am Ammersee to Opelousas (Louisiana) | 5,236.11 mi (8,426.70 km) |
| Diessen am Ammersee to Orange (California) | 5,966.98 mi (9,602.93 km) |
| Diessen am Ammersee to Orange (Texas) | 5,323.74 mi (8,567.73 km) |
| Diessen am Ammersee to Orange City (Florida) | 4,866.75 mi (7,832.28 km) |
| Diessen am Ammersee to Orangeburg (South Carolina) | 4,629.83 mi (7,451.00 km) |
