| Royse City to Olympia (Washington) | 1,696.18 mi (2,729.74 km) |
| Royse City to Olympia Heights (Florida) | 1,083.17 mi (1,743.19 km) |
| Royse City to Omaha (Nebraska) | 572.73 mi (921.71 km) |
| Royse City to On Top of the World Designated Place (Florida) | 871.76 mi (1,402.96 km) |
| Royse City to Onalaska (Wisconsin) | 802.65 mi (1,291.74 km) |
| Royse City to Oneida (New York) | 1,317.70 mi (2,120.64 km) |
| Royse City to Oneonta (New York) | 1,328.00 mi (2,137.21 km) |
| Royse City to Ontario (California) | 1,226.46 mi (1,973.80 km) |
| Royse City to Ontario (Oregon) | 1,346.91 mi (2,167.64 km) |
| Royse City to Opa-locka (Florida) | 1,081.39 mi (1,740.33 km) |
| Royse City to Opelika (Alabama) | 635.36 mi (1,022.51 km) |
| Royse City to Opelousas (Louisiana) | 300.98 mi (484.38 km) |
| Royse City to Orange (California) | 1,239.63 mi (1,994.99 km) |
| Royse City to Orange (Texas) | 248.05 mi (399.19 km) |
| Royse City to Orange City (Florida) | 932.26 mi (1,500.33 km) |
