| Irthlingborough to Kinston (North Carolina) | 3,819.83 mi (6,147.43 km) |
| Irthlingborough to Kirkland (Washington) | 4,718.52 mi (7,593.73 km) |
| Irthlingborough to Kirksville (Missouri) | 4,168.98 mi (6,709.33 km) |
| Irthlingborough to Kirkwood (Missouri) | 4,167.62 mi (6,707.14 km) |
| Irthlingborough to Kiryas Joel (New York) | 3,403.01 mi (5,476.61 km) |
| Irthlingborough to Kissimmee (Florida) | 4,320.38 mi (6,952.98 km) |
| Irthlingborough to Klamath Falls (Oregon) | 5,022.00 mi (8,082.13 km) |
| Irthlingborough to Knightdale (North Carolina) | 3,832.05 mi (6,167.09 km) |
| Irthlingborough to Knik-Fairview (Alaska) | 4,389.74 mi (7,064.60 km) |
| Irthlingborough to Knoxville (Tennessee) | 4,042.96 mi (6,506.51 km) |
| Irthlingborough to Kokomo (Indiana) | 3,912.87 mi (6,297.15 km) |
| Irthlingborough to Kuna (Idaho) | 4,795.05 mi (7,716.90 km) |
| Irthlingborough to Kyle (Texas) | 4,892.67 mi (7,873.99 km) |
| Irthlingborough to La Cañada Flintridge (California) | 5,377.08 mi (8,653.58 km) |
| Irthlingborough to La Crescenta-Montrose (California) | 5,376.90 mi (8,653.29 km) |
