| Royston to Olympia Heights (Florida) | 4,434.95 mi (7,137.37 km) |
| Royston to Omaha (Nebraska) | 4,274.91 mi (6,879.80 km) |
| Royston to On Top of the World Designated Place (Florida) | 4,344.55 mi (6,991.88 km) |
| Royston to Onalaska (Wisconsin) | 3,972.12 mi (6,392.51 km) |
| Royston to Oneida (New York) | 3,417.56 mi (5,500.02 km) |
| Royston to Oneonta (New York) | 3,420.65 mi (5,505.01 km) |
| Royston to Ontario (California) | 5,399.53 mi (8,689.70 km) |
| Royston to Ontario (Oregon) | 4,813.21 mi (7,746.11 km) |
| Royston to Opa-locka (Florida) | 4,422.48 mi (7,117.29 km) |
| Royston to Opelika (Alabama) | 4,292.83 mi (6,908.64 km) |
| Royston to Opelousas (Louisiana) | 4,669.10 mi (7,514.20 km) |
| Royston to Orange (California) | 5,419.92 mi (8,722.51 km) |
| Royston to Orange (Texas) | 4,756.21 mi (7,654.38 km) |
| Royston to Orange City (Florida) | 4,311.81 mi (6,939.19 km) |
| Royston to Orangeburg (South Carolina) | 4,068.75 mi (6,548.02 km) |
