| Porsgrunn to Reidsville (North Carolina) | 4,086.01 mi (6,575.80 km) |
| Porsgrunn to Reisterstown (Maryland) | 3,820.30 mi (6,148.18 km) |
| Porsgrunn to Rendon (Texas) | 4,861.67 mi (7,824.11 km) |
| Porsgrunn to Reno (Nevada) | 5,035.45 mi (8,103.77 km) |
| Porsgrunn to Renton (Washington) | 4,585.77 mi (7,380.08 km) |
| Porsgrunn to Republic (Missouri) | 4,480.22 mi (7,210.22 km) |
| Porsgrunn to Reston (Virginia) | 3,865.36 mi (6,220.70 km) |
| Porsgrunn to Revere (Massachusetts) | 3,468.82 mi (5,582.52 km) |
| Porsgrunn to Rexburg (Idaho) | 4,586.15 mi (7,380.70 km) |
| Porsgrunn to Reynoldsburg (Ohio) | 3,988.43 mi (6,418.76 km) |
| Porsgrunn to Rialto (California) | 5,319.89 mi (8,561.53 km) |
| Porsgrunn to Richardson (Texas) | 4,822.58 mi (7,761.19 km) |
| Porsgrunn to Richfield (Minnesota) | 4,036.15 mi (6,495.55 km) |
| Porsgrunn to Richfield (Wisconsin) | 3,978.22 mi (6,402.33 km) |
| Porsgrunn to Richland (Washington) | 4,602.24 mi (7,406.59 km) |
