| Irthlingborough to Joliet (Illinois) | 3,939.83 mi (6,340.54 km) |
| Irthlingborough to Jonesboro (Arkansas) | 4,314.28 mi (6,943.16 km) |
| Irthlingborough to Joplin (Missouri) | 4,396.72 mi (7,075.83 km) |
| Irthlingborough to Joppatowne (Maryland) | 3,576.58 mi (5,755.96 km) |
| Irthlingborough to Juana Díaz (Puerto Rico) | 4,224.45 mi (6,798.60 km) |
| Irthlingborough to Junction City (Kansas) | 4,384.72 mi (7,056.52 km) |
| Irthlingborough to Juneau (Alaska) | 4,352.09 mi (7,004.01 km) |
| Irthlingborough to Jupiter (Florida) | 4,336.55 mi (6,979.00 km) |
| Irthlingborough to Jupiter Farms (Florida) | 4,340.85 mi (6,985.92 km) |
| Irthlingborough to Jurupa Valley (California) | 5,365.85 mi (8,635.51 km) |
| Irthlingborough to Justice (Illinois) | 3,917.04 mi (6,303.87 km) |
| Irthlingborough to Kahului (Hawaii) | 7,174.23 mi (11,545.81 km) |
| Irthlingborough to Kailua (Hawaii) | 7,160.11 mi (11,523.09 km) |
| Irthlingborough to Kalamazoo (Michigan) | 3,807.56 mi (6,127.68 km) |
| Irthlingborough to Kalispell (Montana) | 4,474.59 mi (7,201.16 km) |
