| Sliven to Portage (Michigan) | 5,209.68 mi (8,384.16 km) |
| Sliven to Portage (Wisconsin) | 5,278.48 mi (8,494.89 km) |
| Sliven to Portales (New Mexico) | 6,248.40 mi (10,055.82 km) |
| Sliven to Porterville (California) | 6,574.53 mi (10,580.68 km) |
| Sliven to Portland (Maine) | 4,558.87 mi (7,336.79 km) |
| Sliven to Portland (Oregon) | 6,049.83 mi (9,736.26 km) |
| Sliven to Portland (Tennessee) | 5,522.55 mi (8,887.69 km) |
| Sliven to Portland (Texas) | 6,388.46 mi (10,281.24 km) |
| Sliven to Portsmouth (New Hampshire) | 4,605.17 mi (7,411.31 km) |
| Sliven to Portsmouth (Ohio) | 5,278.85 mi (8,495.49 km) |
| Sliven to Portsmouth (Virginia) | 5,105.86 mi (8,217.09 km) |
| Sliven to Post Falls (Idaho) | 5,801.02 mi (9,335.83 km) |
| Sliven to Potomac (Maryland) | 5,040.51 mi (8,111.92 km) |
| Sliven to Potomac Park (California) | 6,616.84 mi (10,648.78 km) |
| Sliven to Pottstown (Pennsylvania) | 4,922.20 mi (7,921.51 km) |
