| McPherson to Olympia Heights (Florida) | 1,334.67 mi (2,147.94 km) |
| McPherson to Omaha (Nebraska) | 217.21 mi (349.57 km) |
| McPherson to On Top of the World Designated Place (Florida) | 1,088.43 mi (1,751.66 km) |
| McPherson to Onalaska (Wisconsin) | 507.68 mi (817.04 km) |
| McPherson to Oneida (New York) | 1,192.97 mi (1,919.90 km) |
| McPherson to Oneonta (New York) | 1,217.67 mi (1,959.65 km) |
| McPherson to Ontario (California) | 1,149.02 mi (1,849.17 km) |
| McPherson to Ontario (Oregon) | 1,074.31 mi (1,728.93 km) |
| McPherson to Opa-locka (Florida) | 1,329.79 mi (2,140.09 km) |
| McPherson to Opelika (Alabama) | 794.52 mi (1,278.66 km) |
| McPherson to Opelousas (Louisiana) | 628.11 mi (1,010.85 km) |
| McPherson to Orange (California) | 1,166.42 mi (1,877.16 km) |
| McPherson to Orange (Texas) | 611.74 mi (984.50 km) |
| McPherson to Orange City (Florida) | 1,142.48 mi (1,838.64 km) |
| McPherson to Orangeburg (South Carolina) | 996.37 mi (1,603.51 km) |
