| Garfield to Olympia Heights (Florida) | 1,106.40 mi (1,780.58 km) |
| Garfield to Omaha (Nebraska) | 1,140.33 mi (1,835.18 km) |
| Garfield to On Top of the World Designated Place (Florida) | 934.88 mi (1,504.55 km) |
| Garfield to Onalaska (Wisconsin) | 895.30 mi (1,440.85 km) |
| Garfield to Oneida (New York) | 171.54 mi (276.06 km) |
| Garfield to Oneonta (New York) | 119.59 mi (192.46 km) |
| Garfield to Ontario (California) | 2,406.62 mi (3,873.09 km) |
| Garfield to Ontario (Oregon) | 2,171.44 mi (3,494.60 km) |
| Garfield to Opa-locka (Florida) | 1,093.26 mi (1,759.43 km) |
| Garfield to Opelika (Alabama) | 842.10 mi (1,355.22 km) |
| Garfield to Opelousas (Louisiana) | 1,232.39 mi (1,983.34 km) |
| Garfield to Orange (California) | 2,424.61 mi (3,902.03 km) |
| Garfield to Orange (Texas) | 1,327.08 mi (2,135.73 km) |
| Garfield to Orange City (Florida) | 919.25 mi (1,479.39 km) |
| Garfield to Orangeburg (South Carolina) | 631.09 mi (1,015.64 km) |
