| Santa Maria di Sala to Olympia Heights (Florida) | 5,080.65 mi (8,176.52 km) |
| Santa Maria di Sala to Omaha (Nebraska) | 4,983.51 mi (8,020.19 km) |
| Santa Maria di Sala to On Top of the World Designated Place (Florida) | 5,008.70 mi (8,060.73 km) |
| Santa Maria di Sala to Onalaska (Wisconsin) | 4,680.28 mi (7,532.19 km) |
| Santa Maria di Sala to Oneida (New York) | 4,110.01 mi (6,614.41 km) |
| Santa Maria di Sala to Oneonta (New York) | 4,110.50 mi (6,615.20 km) |
| Santa Maria di Sala to Ontario (California) | 6,104.32 mi (9,823.95 km) |
| Santa Maria di Sala to Ontario (Oregon) | 5,507.63 mi (8,863.68 km) |
| Santa Maria di Sala to Opa-locka (Florida) | 5,068.56 mi (8,157.05 km) |
| Santa Maria di Sala to Opelika (Alabama) | 4,975.39 mi (8,007.11 km) |
| Santa Maria di Sala to Opelousas (Louisiana) | 5,360.24 mi (8,626.47 km) |
| Santa Maria di Sala to Orange (California) | 6,124.68 mi (9,856.72 km) |
| Santa Maria di Sala to Orange (Texas) | 5,449.59 mi (8,770.26 km) |
| Santa Maria di Sala to Orange City (Florida) | 4,972.43 mi (8,002.35 km) |
| Santa Maria di Sala to Orangeburg (South Carolina) | 4,743.31 mi (7,633.62 km) |
