| Pembroke Dock to Odessa (Texas) | 4,817.00 mi (7,752.22 km) |
| Pembroke Dock to Ogden (Utah) | 4,672.36 mi (7,519.43 km) |
| Pembroke Dock to Oildale (California) | 5,223.13 mi (8,405.81 km) |
| Pembroke Dock to Ojus (Florida) | 4,210.73 mi (6,776.51 km) |
| Pembroke Dock to Okemos (Michigan) | 3,593.79 mi (5,783.65 km) |
| Pembroke Dock to Oklahoma City (Oklahoma) | 4,446.91 mi (7,156.61 km) |
| Pembroke Dock to Okmulgee (Oklahoma) | 4,381.17 mi (7,050.81 km) |
| Pembroke Dock to Olathe (Kansas) | 4,174.58 mi (6,718.34 km) |
| Pembroke Dock to Old Jamestown (Missouri) | 4,000.71 mi (6,438.52 km) |
| Pembroke Dock to Oldsmar (Florida) | 4,212.36 mi (6,779.15 km) |
| Pembroke Dock to Olean (New York) | 3,382.35 mi (5,443.37 km) |
| Pembroke Dock to Olive Branch (Mississippi) | 4,169.33 mi (6,709.89 km) |
| Pembroke Dock to Olivehurst (California) | 5,098.48 mi (8,205.21 km) |
| Pembroke Dock to Olney (Maryland) | 3,453.89 mi (5,558.49 km) |
| Pembroke Dock to Olympia (Washington) | 4,691.13 mi (7,549.64 km) |
