| Lemon Grove to Olympia Heights (Florida) | 2,253.26 mi (3,626.27 km) |
| Lemon Grove to Omaha (Nebraska) | 1,294.47 mi (2,083.25 km) |
| Lemon Grove to On Top of the World Designated Place (Florida) | 2,065.64 mi (3,324.33 km) |
| Lemon Grove to Onalaska (Wisconsin) | 1,588.67 mi (2,556.72 km) |
| Lemon Grove to Oneida (New York) | 2,339.49 mi (3,765.05 km) |
| Lemon Grove to Oneonta (New York) | 2,367.38 mi (3,809.93 km) |
| Lemon Grove to Ontario (California) | 96.09 mi (154.65 km) |
| Lemon Grove to Ontario (Oregon) | 780.26 mi (1,255.71 km) |
| Lemon Grove to Opa-locka (Florida) | 2,253.77 mi (3,627.09 km) |
| Lemon Grove to Opelika (Alabama) | 1,833.74 mi (2,951.13 km) |
| Lemon Grove to Opelousas (Louisiana) | 1,472.47 mi (2,369.72 km) |
| Lemon Grove to Orange (California) | 86.84 mi (139.76 km) |
| Lemon Grove to Orange (Texas) | 1,381.13 mi (2,222.72 km) |
| Lemon Grove to Orange City (Florida) | 2,126.89 mi (3,422.89 km) |
| Lemon Grove to Orangeburg (South Carolina) | 2,083.06 mi (3,352.36 km) |
