| Heywood to Olympia Heights (Florida) | 4,328.84 mi (6,966.60 km) |
| Heywood to Omaha (Nebraska) | 4,141.32 mi (6,664.81 km) |
| Heywood to On Top of the World Designated Place (Florida) | 4,232.27 mi (6,811.18 km) |
| Heywood to Onalaska (Wisconsin) | 3,839.14 mi (6,178.51 km) |
| Heywood to Oneida (New York) | 3,294.72 mi (5,302.35 km) |
| Heywood to Oneonta (New York) | 3,299.05 mi (5,309.31 km) |
| Heywood to Ontario (California) | 5,260.50 mi (8,465.96 km) |
| Heywood to Ontario (Oregon) | 4,672.76 mi (7,520.08 km) |
| Heywood to Opa-locka (Florida) | 4,316.26 mi (6,946.34 km) |
| Heywood to Opelika (Alabama) | 4,173.64 mi (6,716.83 km) |
| Heywood to Opelousas (Louisiana) | 4,546.04 mi (7,316.14 km) |
| Heywood to Orange (California) | 5,280.89 mi (8,498.77 km) |
| Heywood to Orange (Texas) | 4,632.08 mi (7,454.62 km) |
| Heywood to Orange City (Florida) | 4,200.81 mi (6,760.56 km) |
| Heywood to Orangeburg (South Carolina) | 3,952.92 mi (6,361.61 km) |
