| Creve Coeur to Olympia Heights (Florida) | 1,069.88 mi (1,721.80 km) |
| Creve Coeur to Omaha (Nebraska) | 347.09 mi (558.59 km) |
| Creve Coeur to On Top of the World Designated Place (Florida) | 808.41 mi (1,301.01 km) |
| Creve Coeur to Onalaska (Wisconsin) | 363.27 mi (584.63 km) |
| Creve Coeur to Oneida (New York) | 828.90 mi (1,333.99 km) |
| Creve Coeur to Oneonta (New York) | 847.21 mi (1,363.45 km) |
| Creve Coeur to Ontario (California) | 1,538.98 mi (2,476.74 km) |
| Creve Coeur to Ontario (Oregon) | 1,418.50 mi (2,282.85 km) |
| Creve Coeur to Opa-locka (Florida) | 1,062.18 mi (1,709.41 km) |
| Creve Coeur to Opelika (Alabama) | 502.57 mi (808.81 km) |
| Creve Coeur to Opelousas (Louisiana) | 569.84 mi (917.07 km) |
| Creve Coeur to Orange (California) | 1,556.17 mi (2,504.41 km) |
| Creve Coeur to Orange (Texas) | 619.46 mi (996.93 km) |
| Creve Coeur to Orange City (Florida) | 852.21 mi (1,371.49 km) |
| Creve Coeur to Orangeburg (South Carolina) | 642.48 mi (1,033.97 km) |
