| Knurow to Olympia Heights (Florida) | 5,246.10 mi (8,442.78 km) |
| Knurow to Omaha (Nebraska) | 4,989.16 mi (8,029.27 km) |
| Knurow to On Top of the World Designated Place (Florida) | 5,146.74 mi (8,282.87 km) |
| Knurow to Onalaska (Wisconsin) | 4,693.05 mi (7,552.74 km) |
| Knurow to Oneida (New York) | 4,193.73 mi (6,749.15 km) |
| Knurow to Oneonta (New York) | 4,200.92 mi (6,760.72 km) |
| Knurow to Ontario (California) | 6,032.75 mi (9,708.78 km) |
| Knurow to Ontario (Oregon) | 5,400.99 mi (8,692.06 km) |
| Knurow to Opa-locka (Florida) | 5,233.50 mi (8,422.51 km) |
| Knurow to Opelika (Alabama) | 5,079.05 mi (8,173.95 km) |
| Knurow to Opelousas (Louisiana) | 5,441.87 mi (8,757.84 km) |
| Knurow to Orange (California) | 6,052.81 mi (9,741.05 km) |
| Knurow to Orange (Texas) | 5,524.63 mi (8,891.03 km) |
| Knurow to Orange City (Florida) | 5,116.24 mi (8,233.79 km) |
| Knurow to Orangeburg (South Carolina) | 4,863.85 mi (7,827.60 km) |
