| Porsgrunn to Ridgeland (Mississippi) | 4,649.73 mi (7,483.01 km) |
| Porsgrunn to Ridgewood (New Jersey) | 3,648.48 mi (5,871.66 km) |
| Porsgrunn to Rifle (Colorado) | 4,745.17 mi (7,636.61 km) |
| Porsgrunn to Rincon (Georgia) | 4,364.57 mi (7,024.09 km) |
| Porsgrunn to Ringwood (New Jersey) | 3,647.30 mi (5,869.76 km) |
| Porsgrunn to Río Grande (Puerto Rico) | 4,623.12 mi (7,440.19 km) |
| Porsgrunn to Rio Grande City (Texas) | 5,278.58 mi (8,495.06 km) |
| Porsgrunn to Rio Linda (California) | 5,124.68 mi (8,247.38 km) |
| Porsgrunn to Rio Rancho (New Mexico) | 4,973.08 mi (8,003.39 km) |
| Porsgrunn to Rio Rico (Arizona) | 5,320.36 mi (8,562.29 km) |
| Porsgrunn to Ripon (California) | 5,177.74 mi (8,332.77 km) |
| Porsgrunn to River Edge (New Jersey) | 3,648.93 mi (5,872.39 km) |
| Porsgrunn to River Falls (Wisconsin) | 4,018.03 mi (6,466.40 km) |
| Porsgrunn to River Forest (Illinois) | 4,039.56 mi (6,501.05 km) |
| Porsgrunn to River Grove (Illinois) | 4,038.51 mi (6,499.35 km) |
