| Escondido to Olympia Heights (Florida) | 2,256.91 mi (3,632.15 km) |
| Escondido to Omaha (Nebraska) | 1,281.39 mi (2,062.19 km) |
| Escondido to On Top of the World Designated Place (Florida) | 2,066.84 mi (3,326.25 km) |
| Escondido to Onalaska (Wisconsin) | 1,574.09 mi (2,533.25 km) |
| Escondido to Oneida (New York) | 2,327.66 mi (3,746.00 km) |
| Escondido to Oneonta (New York) | 2,356.05 mi (3,791.70 km) |
| Escondido to Ontario (California) | 69.65 mi (112.08 km) |
| Escondido to Ontario (Oregon) | 752.52 mi (1,211.06 km) |
| Escondido to Opa-locka (Florida) | 2,257.25 mi (3,632.69 km) |
| Escondido to Opelika (Alabama) | 1,831.98 mi (2,948.28 km) |
| Escondido to Opelousas (Louisiana) | 1,474.54 mi (2,373.04 km) |
| Escondido to Orange (California) | 63.27 mi (101.82 km) |
| Escondido to Orange (Texas) | 1,384.20 mi (2,227.65 km) |
| Escondido to Orange City (Florida) | 2,128.00 mi (3,424.68 km) |
| Escondido to Orangeburg (South Carolina) | 2,079.84 mi (3,347.17 km) |
