| Tranent to Olympia Heights (Florida) | 4,282.40 mi (6,891.85 km) |
| Tranent to Omaha (Nebraska) | 4,036.61 mi (6,496.29 km) |
| Tranent to On Top of the World Designated Place (Florida) | 4,174.92 mi (6,718.89 km) |
| Tranent to Onalaska (Wisconsin) | 3,736.53 mi (6,013.37 km) |
| Tranent to Oneida (New York) | 3,217.88 mi (5,178.68 km) |
| Tranent to Oneonta (New York) | 3,224.85 mi (5,189.90 km) |
| Tranent to Ontario (California) | 5,135.25 mi (8,264.38 km) |
| Tranent to Ontario (Oregon) | 4,537.83 mi (7,302.94 km) |
| Tranent to Opa-locka (Florida) | 4,269.64 mi (6,871.32 km) |
| Tranent to Opelika (Alabama) | 4,103.04 mi (6,603.20 km) |
| Tranent to Opelousas (Louisiana) | 4,466.85 mi (7,188.70 km) |
| Tranent to Orange (California) | 5,155.59 mi (8,297.12 km) |
| Tranent to Orange (Texas) | 4,550.50 mi (7,323.32 km) |
| Tranent to Orange City (Florida) | 4,145.88 mi (6,672.15 km) |
| Tranent to Orangeburg (South Carolina) | 3,889.30 mi (6,259.22 km) |
