| Longford to Popovo | 1,692.86 mi (2,724.40 km) |
| Longford to Provadia | 1,748.01 mi (2,813.15 km) |
| Longford to Radnevo | 1,725.51 mi (2,776.94 km) |
| Longford to Radomir | 1,596.71 mi (2,569.66 km) |
| Longford to Rakitovo | 1,666.29 mi (2,681.63 km) |
| Longford to Rakovski | 1,687.62 mi (2,715.96 km) |
| Longford to Razgrad | 1,696.65 mi (2,730.50 km) |
| Longford to Razlog | 1,646.60 mi (2,649.94 km) |
| Longford to Ruse | 1,662.14 mi (2,674.95 km) |
| Longford to Samokov | 1,629.87 mi (2,623.02 km) |
| Longford to Sandanski | 1,653.65 mi (2,661.29 km) |
| Longford to Sevlievo | 1,661.71 mi (2,674.27 km) |
| Longford to Shumen | 1,723.74 mi (2,774.10 km) |
| Longford to Silistra | 1,702.92 mi (2,740.59 km) |
| Longford to Sliven | 1,724.96 mi (2,776.05 km) |
