| Porsgrunn to Madison (New Jersey) | 3,670.52 mi (5,907.12 km) |
| Porsgrunn to Madison (Wisconsin) | 4,021.58 mi (6,472.11 km) |
| Porsgrunn to Madison Heights (Michigan) | 3,859.15 mi (6,210.69 km) |
| Porsgrunn to Madison Heights (Virginia) | 4,005.85 mi (6,446.78 km) |
| Porsgrunn to Madisonville (Kentucky) | 4,284.53 mi (6,895.28 km) |
| Porsgrunn to Magalia (California) | 5,056.44 mi (8,137.55 km) |
| Porsgrunn to Magna (Utah) | 4,781.38 mi (7,694.89 km) |
| Porsgrunn to Magnolia (Arkansas) | 4,697.42 mi (7,559.76 km) |
| Porsgrunn to Maili (Hawaii) | 6,830.07 mi (10,991.94 km) |
| Porsgrunn to Maitland (Florida) | 4,577.65 mi (7,367.01 km) |
| Porsgrunn to Makakilo (Hawaii) | 6,833.17 mi (10,996.93 km) |
| Porsgrunn to Malden (Massachusetts) | 3,470.01 mi (5,584.45 km) |
| Porsgrunn to Malibu (California) | 5,358.13 mi (8,623.08 km) |
| Porsgrunn to Maltby (Washington) | 4,563.71 mi (7,344.58 km) |
| Porsgrunn to Malvern (Arkansas) | 4,621.17 mi (7,437.06 km) |
