| Sestao to Olympia Heights (Florida) | 4,408.29 mi (7,094.45 km) |
| Sestao to Omaha (Nebraska) | 4,488.00 mi (7,222.74 km) |
| Sestao to On Top of the World Designated Place (Florida) | 4,362.11 mi (7,020.14 km) |
| Sestao to Onalaska (Wisconsin) | 4,182.09 mi (6,730.42 km) |
| Sestao to Oneida (New York) | 3,535.91 mi (5,690.50 km) |
| Sestao to Oneonta (New York) | 3,528.53 mi (5,678.62 km) |
| Sestao to Ontario (California) | 5,690.47 mi (9,157.93 km) |
| Sestao to Ontario (Oregon) | 5,160.04 mi (8,304.28 km) |
| Sestao to Opa-locka (Florida) | 4,396.75 mi (7,075.89 km) |
| Sestao to Opelika (Alabama) | 4,363.88 mi (7,022.99 km) |
| Sestao to Opelousas (Louisiana) | 4,766.81 mi (7,671.44 km) |
| Sestao to Orange (California) | 5,710.83 mi (9,190.70 km) |
| Sestao to Orange (Texas) | 4,862.06 mi (7,824.73 km) |
| Sestao to Orange City (Florida) | 4,320.77 mi (6,953.60 km) |
| Sestao to Orangeburg (South Carolina) | 4,117.51 mi (6,626.49 km) |
