| Irthlingborough to Kenosha (Wisconsin) | 3,879.30 mi (6,243.12 km) |
| Irthlingborough to Kent (Ohio) | 3,696.55 mi (5,949.02 km) |
| Irthlingborough to Kent (Washington) | 4,736.36 mi (7,622.43 km) |
| Irthlingborough to Kentwood (Michigan) | 3,779.56 mi (6,082.62 km) |
| Irthlingborough to Kerman (California) | 5,289.75 mi (8,513.03 km) |
| Irthlingborough to Kernersville (North Carolina) | 3,881.36 mi (6,246.44 km) |
| Irthlingborough to Kerrville (Texas) | 4,937.91 mi (7,946.80 km) |
| Irthlingborough to Kettering (Maryland) | 3,618.31 mi (5,823.11 km) |
| Irthlingborough to Kettering (Ohio) | 3,872.66 mi (6,232.44 km) |
| Irthlingborough to Kewanee (Illinois) | 4,019.77 mi (6,469.19 km) |
| Irthlingborough to Key Biscayne (Florida) | 4,401.54 mi (7,083.59 km) |
| Irthlingborough to Key Largo (Florida) | 4,441.03 mi (7,147.15 km) |
| Irthlingborough to Key West (Florida) | 4,526.80 mi (7,285.18 km) |
| Irthlingborough to Keystone (Florida) | 4,378.03 mi (7,045.75 km) |
| Irthlingborough to Kihei (Hawaii) | 7,181.07 mi (11,556.82 km) |
