| Fredericksburg to Olympia Heights (Florida) | 884.64 mi (1,423.69 km) |
| Fredericksburg to Omaha (Nebraska) | 1,004.77 mi (1,617.02 km) |
| Fredericksburg to On Top of the World Designated Place (Florida) | 692.24 mi (1,114.05 km) |
| Fredericksburg to Onalaska (Wisconsin) | 810.65 mi (1,304.62 km) |
| Fredericksburg to Oneida (New York) | 343.65 mi (553.05 km) |
| Fredericksburg to Oneonta (New York) | 314.10 mi (505.50 km) |
| Fredericksburg to Ontario (California) | 2,239.41 mi (3,603.98 km) |
| Fredericksburg to Ontario (Oregon) | 2,071.33 mi (3,333.48 km) |
| Fredericksburg to Opa-locka (Florida) | 871.78 mi (1,402.99 km) |
| Fredericksburg to Opelika (Alabama) | 590.16 mi (949.78 km) |
| Fredericksburg to Opelousas (Louisiana) | 988.34 mi (1,590.58 km) |
| Fredericksburg to Orange (California) | 2,256.49 mi (3,631.47 km) |
| Fredericksburg to Orange (Texas) | 1,085.55 mi (1,747.02 km) |
| Fredericksburg to Orange City (Florida) | 682.79 mi (1,098.85 km) |
| Fredericksburg to Orangeburg (South Carolina) | 382.12 mi (614.96 km) |
