| Simi Valley to Odenton (Maryland) | 2,333.35 mi (3,755.16 km) |
| Simi Valley to Odessa (Texas) | 962.87 mi (1,549.59 km) |
| Simi Valley to Ogden (Utah) | 606.69 mi (976.37 km) |
| Simi Valley to Oildale (California) | 81.93 mi (131.85 km) |
| Simi Valley to Ojus (Florida) | 2,361.80 mi (3,800.95 km) |
| Simi Valley to Okemos (Michigan) | 1,931.22 mi (3,108.00 km) |
| Simi Valley to Oklahoma City (Oklahoma) | 1,204.37 mi (1,938.24 km) |
| Simi Valley to Okmulgee (Oklahoma) | 1,288.60 mi (2,073.80 km) |
| Simi Valley to Olathe (Kansas) | 1,361.25 mi (2,190.71 km) |
| Simi Valley to Old Jamestown (Missouri) | 1,604.32 mi (2,581.90 km) |
| Simi Valley to Oldsmar (Florida) | 2,164.33 mi (3,483.15 km) |
| Simi Valley to Olean (New York) | 2,233.48 mi (3,594.45 km) |
| Simi Valley to Olive Branch (Mississippi) | 1,638.45 mi (2,636.83 km) |
| Simi Valley to Olivehurst (California) | 367.10 mi (590.79 km) |
| Simi Valley to Olney (Maryland) | 2,312.68 mi (3,721.91 km) |
