| Waterville to Popovo | 4,466.28 mi (7,187.79 km) |
| Waterville to Provadia | 4,520.64 mi (7,275.26 km) |
| Waterville to Radnevo | 4,499.49 mi (7,241.22 km) |
| Waterville to Radomir | 4,368.73 mi (7,030.80 km) |
| Waterville to Rakitovo | 4,438.54 mi (7,143.14 km) |
| Waterville to Rakovski | 4,461.19 mi (7,179.60 km) |
| Waterville to Razgrad | 4,469.57 mi (7,193.08 km) |
| Waterville to Razlog | 4,417.70 mi (7,109.61 km) |
| Waterville to Ruse | 4,435.09 mi (7,137.59 km) |
| Waterville to Samokov | 4,402.20 mi (7,084.66 km) |
| Waterville to Sandanski | 4,423.47 mi (7,118.88 km) |
| Waterville to Sevlievo | 4,435.73 mi (7,138.62 km) |
| Waterville to Shumen | 4,496.69 mi (7,236.73 km) |
| Waterville to Silistra | 4,473.52 mi (7,199.43 km) |
| Waterville to Sliven | 4,498.90 mi (7,240.27 km) |
