| Ontario to Kennewick (Washington) | 844.09 mi (1,358.43 km) |
| Ontario to Kenosha (Wisconsin) | 1,705.81 mi (2,745.24 km) |
| Ontario to Kent (Ohio) | 2,028.50 mi (3,264.55 km) |
| Ontario to Kent (Washington) | 952.93 mi (1,533.59 km) |
| Ontario to Kentwood (Michigan) | 1,823.57 mi (2,934.75 km) |
| Ontario to Kerman (California) | 231.43 mi (372.46 km) |
| Ontario to Kernersville (North Carolina) | 2,113.46 mi (3,401.29 km) |
| Ontario to Kerrville (Texas) | 1,115.01 mi (1,794.43 km) |
| Ontario to Kettering (Maryland) | 2,273.65 mi (3,659.08 km) |
| Ontario to Kettering (Ohio) | 1,878.79 mi (3,023.62 km) |
| Ontario to Kewanee (Illinois) | 1,586.13 mi (2,552.63 km) |
| Ontario to Key Biscayne (Florida) | 2,302.60 mi (3,705.67 km) |
| Ontario to Key Largo (Florida) | 2,304.45 mi (3,708.65 km) |
| Ontario to Key West (Florida) | 2,242.95 mi (3,609.68 km) |
| Ontario to Keystone (Florida) | 2,100.67 mi (3,380.71 km) |
