| Porsgrunn to Red Bank (New Jersey) | 3,680.67 mi (5,923.47 km) |
| Porsgrunn to Red Bank (Tennessee) | 4,339.61 mi (6,983.93 km) |
| Porsgrunn to Red Bluff (California) | 5,047.68 mi (8,123.46 km) |
| Porsgrunn to Red Hill (South Carolina) | 4,206.31 mi (6,769.40 km) |
| Porsgrunn to Red Oak (Texas) | 4,851.44 mi (7,807.64 km) |
| Porsgrunn to Red Wing (Minnesota) | 4,033.00 mi (6,490.49 km) |
| Porsgrunn to Redan (Georgia) | 4,380.25 mi (7,049.33 km) |
| Porsgrunn to Redding (California) | 5,025.18 mi (8,087.24 km) |
| Porsgrunn to Redland (Maryland) | 3,848.73 mi (6,193.93 km) |
| Porsgrunn to Redlands (California) | 5,318.79 mi (8,559.77 km) |
| Porsgrunn to Redmond (Oregon) | 4,767.64 mi (7,672.78 km) |
| Porsgrunn to Redmond (Washington) | 4,571.89 mi (7,357.74 km) |
| Porsgrunn to Redondo Beach (California) | 5,359.79 mi (8,625.74 km) |
| Porsgrunn to Redwood City (California) | 5,216.75 mi (8,395.55 km) |
| Porsgrunn to Reedley (California) | 5,212.17 mi (8,388.18 km) |
