| McFarland to Olympia Heights (Florida) | 2,394.06 mi (3,852.86 km) |
| McFarland to Omaha (Nebraska) | 1,307.81 mi (2,104.72 km) |
| McFarland to On Top of the World Designated Place (Florida) | 2,189.96 mi (3,524.39 km) |
| McFarland to Onalaska (Wisconsin) | 1,583.48 mi (2,548.36 km) |
| McFarland to Oneida (New York) | 2,355.35 mi (3,790.58 km) |
| McFarland to Oneonta (New York) | 2,387.85 mi (3,842.87 km) |
| McFarland to Ontario (California) | 146.33 mi (235.49 km) |
| McFarland to Ontario (Oregon) | 589.09 mi (948.05 km) |
| McFarland to Opa-locka (Florida) | 2,393.40 mi (3,851.80 km) |
| McFarland to Opelika (Alabama) | 1,937.52 mi (3,118.13 km) |
| McFarland to Opelousas (Louisiana) | 1,606.28 mi (2,585.06 km) |
| McFarland to Orange (California) | 152.53 mi (245.47 km) |
| McFarland to Orange (Texas) | 1,522.41 mi (2,450.08 km) |
| McFarland to Orange City (Florida) | 2,250.37 mi (3,621.61 km) |
| McFarland to Orangeburg (South Carolina) | 2,174.24 mi (3,499.10 km) |
