| Irthlingborough to Smyrna (Delaware) | 3,552.26 mi (5,716.81 km) |
| Irthlingborough to Smyrna (Georgia) | 4,168.74 mi (6,708.94 km) |
| Irthlingborough to Smyrna (Tennessee) | 4,145.00 mi (6,670.73 km) |
| Irthlingborough to Snellville (Georgia) | 4,148.48 mi (6,676.34 km) |
| Irthlingborough to Snoqualmie (Washington) | 4,718.58 mi (7,593.82 km) |
| Irthlingborough to Snyder (Texas) | 4,862.64 mi (7,825.66 km) |
| Irthlingborough to Socastee (South Carolina) | 3,954.02 mi (6,363.39 km) |
| Irthlingborough to Socorro (Texas) | 5,116.20 mi (8,233.73 km) |
| Irthlingborough to Soddy-Daisy (Tennessee) | 4,126.40 mi (6,640.80 km) |
| Irthlingborough to Solana Beach (California) | 5,416.72 mi (8,717.38 km) |
| Irthlingborough to Soledad (California) | 5,344.64 mi (8,601.37 km) |
| Irthlingborough to Solon (Ohio) | 3,688.79 mi (5,936.54 km) |
| Irthlingborough to Somers Point (New Jersey) | 3,510.69 mi (5,649.92 km) |
| Irthlingborough to Somerset (Kentucky) | 4,015.26 mi (6,461.94 km) |
| Irthlingborough to Somerset (New Jersey) | 3,453.15 mi (5,557.30 km) |
