| Ontario to Scottsboro (Alabama) | 1,793.41 mi (2,886.22 km) |
| Ontario to Scottsdale (Arizona) | 330.25 mi (531.48 km) |
| Ontario to Scranton (Pennsylvania) | 2,324.35 mi (3,740.67 km) |
| Ontario to Seabrook (Maryland) | 2,269.88 mi (3,653.03 km) |
| Ontario to Seabrook (Texas) | 1,358.35 mi (2,186.06 km) |
| Ontario to Seaford (New York) | 2,439.66 mi (3,926.26 km) |
| Ontario to Seagoville (Texas) | 1,217.21 mi (1,958.91 km) |
| Ontario to Seal Beach (California) | 33.15 mi (53.36 km) |
| Ontario to Searcy (Arkansas) | 1,468.86 mi (2,363.90 km) |
| Ontario to Seaside (California) | 297.04 mi (478.03 km) |
| Ontario to SeaTac (Washington) | 957.75 mi (1,541.35 km) |
| Ontario to Seattle (Washington) | 969.80 mi (1,560.74 km) |
| Ontario to Sebastian (Florida) | 2,230.27 mi (3,589.28 km) |
| Ontario to Sebring (Florida) | 2,182.17 mi (3,511.87 km) |
| Ontario to Secaucus (New Jersey) | 2,409.21 mi (3,877.25 km) |
