| Houten to Olympia Heights (Florida) | 4,651.24 mi (7,485.45 km) |
| Houten to Omaha (Nebraska) | 4,458.93 mi (7,175.95 km) |
| Houten to On Top of the World Designated Place (Florida) | 4,557.43 mi (7,334.48 km) |
| Houten to Onalaska (Wisconsin) | 4,157.86 mi (6,691.42 km) |
| Houten to Oneida (New York) | 3,620.91 mi (5,827.29 km) |
| Houten to Oneonta (New York) | 3,625.43 mi (5,834.56 km) |
| Houten to Ontario (California) | 5,560.83 mi (8,949.29 km) |
| Houten to Ontario (Oregon) | 4,959.96 mi (7,982.28 km) |
| Houten to Opa-locka (Florida) | 4,638.71 mi (7,465.29 km) |
| Houten to Opelika (Alabama) | 4,500.11 mi (7,242.23 km) |
| Houten to Opelousas (Louisiana) | 4,872.10 mi (7,840.89 km) |
| Houten to Orange (California) | 5,581.16 mi (8,982.01 km) |
| Houten to Orange (Texas) | 4,957.84 mi (7,978.88 km) |
| Houten to Orange City (Florida) | 4,525.51 mi (7,283.10 km) |
| Houten to Orangeburg (South Carolina) | 4,279.02 mi (6,886.42 km) |
