| Hayle to Olympia Heights (Florida) | 4,220.74 mi (6,792.63 km) |
| Hayle to Omaha (Nebraska) | 4,139.82 mi (6,662.39 km) |
| Hayle to On Top of the World Designated Place (Florida) | 4,142.21 mi (6,666.24 km) |
| Hayle to Onalaska (Wisconsin) | 3,834.73 mi (6,171.39 km) |
| Hayle to Oneida (New York) | 3,243.53 mi (5,219.96 km) |
| Hayle to Oneonta (New York) | 3,243.05 mi (5,219.19 km) |
| Hayle to Ontario (California) | 5,301.29 mi (8,531.60 km) |
| Hayle to Ontario (Oregon) | 4,740.65 mi (7,629.35 km) |
| Hayle to Opa-locka (Florida) | 4,208.47 mi (6,772.88 km) |
| Hayle to Opelika (Alabama) | 4,106.49 mi (6,608.76 km) |
| Hayle to Opelousas (Louisiana) | 4,492.65 mi (7,230.23 km) |
| Hayle to Orange (California) | 5,321.72 mi (8,564.47 km) |
| Hayle to Orange (Texas) | 4,582.76 mi (7,375.25 km) |
| Hayle to Orange City (Florida) | 4,106.92 mi (6,609.44 km) |
| Hayle to Orangeburg (South Carolina) | 3,874.71 mi (6,235.75 km) |
