| Westchase to Olympia (Washington) | 2,527.60 mi (4,067.78 km) |
| Westchase to Olympia Heights (Florida) | 213.64 mi (343.82 km) |
| Westchase to Omaha (Nebraska) | 1,186.83 mi (1,910.03 km) |
| Westchase to On Top of the World Designated Place (Florida) | 74.91 mi (120.56 km) |
| Westchase to Onalaska (Wisconsin) | 1,192.97 mi (1,919.89 km) |
| Westchase to Oneida (New York) | 1,107.62 mi (1,782.54 km) |
| Westchase to Oneonta (New York) | 1,080.73 mi (1,739.27 km) |
| Westchase to Ontario (California) | 2,101.74 mi (3,382.42 km) |
| Westchase to Ontario (Oregon) | 2,191.28 mi (3,526.52 km) |
| Westchase to Opa-locka (Florida) | 208.11 mi (334.92 km) |
| Westchase to Opelika (Alabama) | 358.11 mi (576.32 km) |
| Westchase to Opelousas (Louisiana) | 595.34 mi (958.10 km) |
| Westchase to Orange (California) | 2,113.68 mi (3,401.64 km) |
| Westchase to Orange (Texas) | 687.79 mi (1,106.90 km) |
| Westchase to Orange City (Florida) | 100.54 mi (161.80 km) |
