| Fillmore to Olympia Heights (Florida) | 2,368.30 mi (3,811.41 km) |
| Fillmore to Omaha (Nebraska) | 1,329.93 mi (2,140.32 km) |
| Fillmore to On Top of the World Designated Place (Florida) | 2,171.06 mi (3,493.98 km) |
| Fillmore to Onalaska (Wisconsin) | 1,613.17 mi (2,596.15 km) |
| Fillmore to Oneida (New York) | 2,378.98 mi (3,828.60 km) |
| Fillmore to Oneonta (New York) | 2,409.85 mi (3,878.27 km) |
| Fillmore to Ontario (California) | 78.91 mi (127.00 km) |
| Fillmore to Ontario (Oregon) | 673.17 mi (1,083.37 km) |
| Fillmore to Opa-locka (Florida) | 2,368.15 mi (3,811.16 km) |
| Fillmore to Opelika (Alabama) | 1,926.76 mi (3,100.82 km) |
| Fillmore to Opelousas (Louisiana) | 1,582.41 mi (2,546.64 km) |
| Fillmore to Orange (California) | 74.96 mi (120.64 km) |
| Fillmore to Orange (Texas) | 1,495.16 mi (2,406.23 km) |
| Fillmore to Orange City (Florida) | 2,231.89 mi (3,591.88 km) |
| Fillmore to Orangeburg (South Carolina) | 2,168.93 mi (3,490.56 km) |
