| Council Bluffs to Popovo | 5,574.12 mi (8,970.68 km) |
| Council Bluffs to Provadia | 5,621.65 mi (9,047.16 km) |
| Council Bluffs to Radnevo | 5,619.67 mi (9,043.98 km) |
| Council Bluffs to Radomir | 5,506.51 mi (8,861.87 km) |
| Council Bluffs to Rakitovo | 5,574.29 mi (8,970.95 km) |
| Council Bluffs to Rakovski | 5,588.11 mi (8,993.19 km) |
| Council Bluffs to Razgrad | 5,573.60 mi (8,969.84 km) |
| Council Bluffs to Razlog | 5,558.46 mi (8,945.48 km) |
| Council Bluffs to Ruse | 5,540.15 mi (8,916.01 km) |
| Council Bluffs to Samokov | 5,538.06 mi (8,912.65 km) |
| Council Bluffs to Sandanski | 5,568.39 mi (8,961.46 km) |
| Council Bluffs to Sevlievo | 5,554.49 mi (8,939.08 km) |
| Council Bluffs to Shumen | 5,600.27 mi (9,012.76 km) |
| Council Bluffs to Silistra | 5,566.41 mi (8,958.28 km) |
| Council Bluffs to Sliven | 5,612.58 mi (9,032.58 km) |
