| Progress to Olympia (Washington) | 2,313.97 mi (3,723.98 km) |
| Progress to Olympia Heights (Florida) | 1,026.39 mi (1,651.82 km) |
| Progress to Omaha (Nebraska) | 1,005.47 mi (1,618.15 km) |
| Progress to On Top of the World Designated Place (Florida) | 831.95 mi (1,338.89 km) |
| Progress to Onalaska (Wisconsin) | 776.31 mi (1,249.35 km) |
| Progress to Oneida (New York) | 201.90 mi (324.92 km) |
| Progress to Oneonta (New York) | 175.56 mi (282.54 km) |
| Progress to Ontario (California) | 2,265.33 mi (3,645.70 km) |
| Progress to Ontario (Oregon) | 2,051.38 mi (3,301.37 km) |
| Progress to Opa-locka (Florida) | 1,013.51 mi (1,631.09 km) |
| Progress to Opelika (Alabama) | 708.38 mi (1,140.03 km) |
| Progress to Opelousas (Louisiana) | 1,089.05 mi (1,752.65 km) |
| Progress to Orange (California) | 2,283.10 mi (3,674.30 km) |
| Progress to Orange (Texas) | 1,182.32 mi (1,902.77 km) |
| Progress to Orange City (Florida) | 824.03 mi (1,326.16 km) |
