| Encinitas to Oswego (Illinois) | 1,686.85 mi (2,714.71 km) |
| Encinitas to Oswego (New York) | 2,299.63 mi (3,700.90 km) |
| Encinitas to Otsego (Minnesota) | 1,513.06 mi (2,435.03 km) |
| Encinitas to Ottawa (Illinois) | 1,657.66 mi (2,667.74 km) |
| Encinitas to Ottawa (Kansas) | 1,286.94 mi (2,071.14 km) |
| Encinitas to Ottumwa (Iowa) | 1,470.27 mi (2,366.18 km) |
| Encinitas to Overland (Missouri) | 1,549.18 mi (2,493.17 km) |
| Encinitas to Overland Park (Kansas) | 1,321.16 mi (2,126.21 km) |
| Encinitas to Overlea (Maryland) | 2,293.11 mi (3,690.41 km) |
| Encinitas to Oviedo (Florida) | 2,150.58 mi (3,461.02 km) |
| Encinitas to Owasso (Oklahoma) | 1,235.50 mi (1,988.35 km) |
| Encinitas to Owatonna (Minnesota) | 1,497.40 mi (2,409.84 km) |
| Encinitas to Owensboro (Kentucky) | 1,720.76 mi (2,769.29 km) |
| Encinitas to Owings Mills (Maryland) | 2,278.39 mi (3,666.72 km) |
| Encinitas to Owosso (Michigan) | 1,912.40 mi (3,077.70 km) |
