| Troutdale to Popovo | 6,000.40 mi (9,656.71 km) |
| Troutdale to Provadia | 6,032.81 mi (9,708.88 km) |
| Troutdale to Radnevo | 6,062.32 mi (9,756.37 km) |
| Troutdale to Radomir | 5,988.01 mi (9,636.77 km) |
| Troutdale to Rakitovo | 6,046.79 mi (9,731.37 km) |
| Troutdale to Rakovski | 6,044.61 mi (9,727.86 km) |
| Troutdale to Razgrad | 5,993.77 mi (9,646.05 km) |
| Troutdale to Razlog | 6,040.78 mi (9,721.70 km) |
| Troutdale to Ruse | 5,964.86 mi (9,599.52 km) |
| Troutdale to Samokov | 6,013.74 mi (9,678.18 km) |
| Troutdale to Sandanski | 6,057.04 mi (9,747.87 km) |
| Troutdale to Sevlievo | 6,000.28 mi (9,656.52 km) |
| Troutdale to Shumen | 6,017.42 mi (9,684.10 km) |
| Troutdale to Silistra | 5,969.40 mi (9,606.82 km) |
| Troutdale to Sliven | 6,045.14 mi (9,728.71 km) |
