| Airdrie to Popovo | 1,585.94 mi (2,552.33 km) |
| Airdrie to Provadia | 1,637.69 mi (2,635.61 km) |
| Airdrie to Radnevo | 1,626.01 mi (2,616.81 km) |
| Airdrie to Radomir | 1,508.16 mi (2,427.14 km) |
| Airdrie to Rakitovo | 1,576.32 mi (2,536.84 km) |
| Airdrie to Rakovski | 1,592.08 mi (2,562.21 km) |
| Airdrie to Razgrad | 1,587.58 mi (2,554.96 km) |
| Airdrie to Razlog | 1,559.93 mi (2,510.47 km) |
| Airdrie to Ruse | 1,553.36 mi (2,499.89 km) |
| Airdrie to Samokov | 1,540.00 mi (2,478.39 km) |
| Airdrie to Sandanski | 1,569.74 mi (2,526.25 km) |
| Airdrie to Sevlievo | 1,561.09 mi (2,512.33 km) |
| Airdrie to Shumen | 1,614.64 mi (2,598.52 km) |
| Airdrie to Silistra | 1,587.69 mi (2,555.14 km) |
| Airdrie to Sliven | 1,621.65 mi (2,609.79 km) |
