| Trento to Olympia Heights (Florida) | 5,025.91 mi (8,088.42 km) |
| Trento to Omaha (Nebraska) | 4,924.79 mi (7,925.68 km) |
| Trento to On Top of the World Designated Place (Florida) | 4,952.66 mi (7,970.54 km) |
| Trento to Onalaska (Wisconsin) | 4,621.56 mi (7,437.69 km) |
| Trento to Oneida (New York) | 4,052.05 mi (6,521.15 km) |
| Trento to Oneonta (New York) | 4,052.70 mi (6,522.19 km) |
| Trento to Ontario (California) | 6,046.32 mi (9,730.60 km) |
| Trento to Ontario (Oregon) | 5,450.67 mi (8,772.01 km) |
| Trento to Opa-locka (Florida) | 5,013.78 mi (8,068.91 km) |
| Trento to Opelika (Alabama) | 4,918.11 mi (7,914.94 km) |
| Trento to Opelousas (Louisiana) | 5,302.44 mi (8,533.45 km) |
| Trento to Orange (California) | 6,066.68 mi (9,763.38 km) |
| Trento to Orange (Texas) | 5,391.65 mi (8,677.02 km) |
| Trento to Orange City (Florida) | 4,916.63 mi (7,912.54 km) |
| Trento to Orangeburg (South Carolina) | 4,686.53 mi (7,542.25 km) |
