| West Sacramento to Olympia (Washington) | 590.25 mi (949.92 km) |
| West Sacramento to Olympia Heights (Florida) | 2,544.11 mi (4,094.35 km) |
| West Sacramento to Omaha (Nebraska) | 1,359.24 mi (2,187.49 km) |
| West Sacramento to On Top of the World Designated Place (Florida) | 2,326.85 mi (3,744.70 km) |
| West Sacramento to Onalaska (Wisconsin) | 1,609.63 mi (2,590.45 km) |
| West Sacramento to Oneida (New York) | 2,389.65 mi (3,845.78 km) |
| West Sacramento to Oneonta (New York) | 2,426.25 mi (3,904.67 km) |
| West Sacramento to Ontario (California) | 381.50 mi (613.97 km) |
| West Sacramento to Ontario (Oregon) | 446.20 mi (718.09 km) |
| West Sacramento to Opa-locka (Florida) | 2,542.41 mi (4,091.62 km) |
| West Sacramento to Opelika (Alabama) | 2,058.67 mi (3,313.11 km) |
| West Sacramento to Opelousas (Louisiana) | 1,757.67 mi (2,828.70 km) |
| West Sacramento to Orange (California) | 388.55 mi (625.31 km) |
| West Sacramento to Orange (Texas) | 1,681.16 mi (2,705.57 km) |
| West Sacramento to Orange City (Florida) | 2,386.00 mi (3,839.90 km) |
