| Tracy to Olympia (Washington) | 647.76 mi (1,042.47 km) |
| Tracy to Olympia Heights (Florida) | 2,531.40 mi (4,073.89 km) |
| Tracy to Omaha (Nebraska) | 1,371.00 mi (2,206.41 km) |
| Tracy to On Top of the World Designated Place (Florida) | 2,317.85 mi (3,730.22 km) |
| Tracy to Onalaska (Wisconsin) | 1,627.93 mi (2,619.90 km) |
| Tracy to Oneida (New York) | 2,407.16 mi (3,873.94 km) |
| Tracy to Oneonta (New York) | 2,442.83 mi (3,931.35 km) |
| Tracy to Ontario (California) | 333.50 mi (536.72 km) |
| Tracy to Ontario (Oregon) | 493.88 mi (794.82 km) |
| Tracy to Opa-locka (Florida) | 2,530.01 mi (4,071.66 km) |
| Tracy to Opelika (Alabama) | 2,053.85 mi (3,305.35 km) |
| Tracy to Opelousas (Louisiana) | 1,743.84 mi (2,806.44 km) |
| Tracy to Orange (California) | 338.90 mi (545.41 km) |
| Tracy to Orange (Texas) | 1,665.02 mi (2,679.59 km) |
| Tracy to Orange City (Florida) | 2,377.41 mi (3,826.08 km) |
