| Federal Way to Olympia Heights (Florida) | 2,720.65 mi (4,378.46 km) |
| Federal Way to Omaha (Nebraska) | 1,357.91 mi (2,185.34 km) |
| Federal Way to On Top of the World Designated Place (Florida) | 2,473.79 mi (3,981.18 km) |
| Federal Way to Onalaska (Wisconsin) | 1,512.92 mi (2,434.82 km) |
| Federal Way to Oneida (New York) | 2,256.97 mi (3,632.25 km) |
| Federal Way to Oneonta (New York) | 2,302.26 mi (3,705.13 km) |
| Federal Way to Ontario (California) | 949.28 mi (1,527.73 km) |
| Federal Way to Ontario (Oregon) | 343.99 mi (553.60 km) |
| Federal Way to Opa-locka (Florida) | 2,715.90 mi (4,370.82 km) |
| Federal Way to Opelika (Alabama) | 2,175.23 mi (3,500.69 km) |
| Federal Way to Opelousas (Louisiana) | 1,977.17 mi (3,181.95 km) |
| Federal Way to Orange (California) | 962.30 mi (1,548.68 km) |
| Federal Way to Orange (Texas) | 1,926.48 mi (3,100.37 km) |
| Federal Way to Orange City (Florida) | 2,526.69 mi (4,066.32 km) |
| Federal Way to Orangeburg (South Carolina) | 2,347.20 mi (3,777.45 km) |
