| Portsmouth to Point Pleasant (New Jersey) | 3,466.57 mi (5,578.91 km) |
| Portsmouth to Pomona (California) | 5,425.33 mi (8,731.23 km) |
| Portsmouth to Pompano Beach (Florida) | 4,368.74 mi (7,030.81 km) |
| Portsmouth to Pompton Lakes (New Jersey) | 3,436.31 mi (5,530.21 km) |
| Portsmouth to Pompton Plains (New Jersey) | 3,438.66 mi (5,533.99 km) |
| Portsmouth to Ponca City (Oklahoma) | 4,543.21 mi (7,311.59 km) |
| Portsmouth to Ponce (Puerto Rico) | 4,197.74 mi (6,755.60 km) |
| Portsmouth to Pontiac (Illinois) | 4,017.70 mi (6,465.87 km) |
| Portsmouth to Pontiac (Michigan) | 3,729.24 mi (6,001.64 km) |
| Portsmouth to Pooler (Georgia) | 4,130.58 mi (6,647.52 km) |
| Portsmouth to Poplar Bluff (Missouri) | 4,282.30 mi (6,891.70 km) |
| Portsmouth to Poquoson (Virginia) | 3,690.98 mi (5,940.06 km) |
| Portsmouth to Port Angeles (Washington) | 4,798.26 mi (7,722.05 km) |
| Portsmouth to Port Arthur (Texas) | 4,766.20 mi (7,670.45 km) |
| Portsmouth to Port Charlotte (Florida) | 4,416.65 mi (7,107.92 km) |
