| Encinitas to Orangevale (California) | 448.16 mi (721.24 km) |
| Encinitas to Orchards (Washington) | 917.02 mi (1,475.80 km) |
| Encinitas to Orcutt (California) | 220.50 mi (354.87 km) |
| Encinitas to Oregon (Ohio) | 1,936.55 mi (3,116.57 km) |
| Encinitas to Oregon (Wisconsin) | 1,653.99 mi (2,661.84 km) |
| Encinitas to Oregon City (Oregon) | 895.49 mi (1,441.16 km) |
| Encinitas to Orem (Utah) | 587.77 mi (945.93 km) |
| Encinitas to Orinda (California) | 433.48 mi (697.62 km) |
| Encinitas to Orland Park (Illinois) | 1,709.95 mi (2,751.89 km) |
| Encinitas to Orlando (Florida) | 2,145.65 mi (3,453.08 km) |
| Encinitas to Ormond Beach (Florida) | 2,142.76 mi (3,448.44 km) |
| Encinitas to Oro Valley (Arizona) | 367.76 mi (591.85 km) |
| Encinitas to Oroville (California) | 505.88 mi (814.13 km) |
| Encinitas to Oshkosh (Wisconsin) | 1,714.50 mi (2,759.22 km) |
| Encinitas to Oskaloosa (Iowa) | 1,463.80 mi (2,355.77 km) |
