| Reus to Olympia Heights (Florida) | 4,647.37 mi (7,479.22 km) |
| Reus to Omaha (Nebraska) | 4,745.81 mi (7,637.64 km) |
| Reus to On Top of the World Designated Place (Florida) | 4,607.51 mi (7,415.08 km) |
| Reus to Onalaska (Wisconsin) | 4,439.89 mi (7,145.31 km) |
| Reus to Oneida (New York) | 3,791.68 mi (6,102.11 km) |
| Reus to Oneonta (New York) | 3,783.73 mi (6,089.32 km) |
| Reus to Ontario (California) | 5,946.57 mi (9,570.08 km) |
| Reus to Ontario (Oregon) | 5,411.17 mi (8,708.44 km) |
| Reus to Opa-locka (Florida) | 4,636.01 mi (7,460.93 km) |
| Reus to Opelika (Alabama) | 4,615.13 mi (7,427.34 km) |
| Reus to Opelousas (Louisiana) | 5,019.81 mi (8,078.61 km) |
| Reus to Orange (California) | 5,966.94 mi (9,602.86 km) |
| Reus to Orange (Texas) | 5,115.59 mi (8,232.74 km) |
| Reus to Orange City (Florida) | 4,565.16 mi (7,346.91 km) |
| Reus to Orangeburg (South Carolina) | 4,367.00 mi (7,028.00 km) |
