| Porsgrunn to Ratingen | 551.52 mi (887.59 km) |
| Porsgrunn to Ratzeburg | 376.28 mi (605.56 km) |
| Porsgrunn to Raubling | 788.70 mi (1,269.29 km) |
| Porsgrunn to Rauenberg | 681.61 mi (1,096.95 km) |
| Porsgrunn to Raunheim | 630.67 mi (1,014.96 km) |
| Porsgrunn to Ravensburg | 783.01 mi (1,260.13 km) |
| Porsgrunn to Recke | 472.41 mi (760.27 km) |
| Porsgrunn to Recklinghausen | 529.75 mi (852.56 km) |
| Porsgrunn to Regen | 714.60 mi (1,150.04 km) |
| Porsgrunn to Regensburg | 704.26 mi (1,133.39 km) |
| Porsgrunn to Regenstauf | 697.17 mi (1,121.99 km) |
| Porsgrunn to Rehau | 619.35 mi (996.74 km) |
| Porsgrunn to Rehburg-Loccum | 460.90 mi (741.75 km) |
| Porsgrunn to Rehlingen-Siersburg | 684.30 mi (1,101.28 km) |
| Porsgrunn to Reichelsheim | 650.45 mi (1,046.80 km) |
