| Greeley to Smolyan | 5,947.89 mi (9,572.20 km) |
| Greeley to Sofia | 5,844.11 mi (9,405.19 km) |
| Greeley to Sopot | 5,889.85 mi (9,478.80 km) |
| Greeley to Sozopol | 5,989.54 mi (9,639.24 km) |
| Greeley to Sredets | 5,978.93 mi (9,622.16 km) |
| Greeley to Stamboliyski | 5,912.15 mi (9,514.68 km) |
| Greeley to Stara Zagora | 5,928.81 mi (9,541.49 km) |
| Greeley to Svilengrad | 5,982.68 mi (9,628.20 km) |
| Greeley to Svishtov | 5,853.54 mi (9,420.36 km) |
| Greeley to Targovishte | 5,910.02 mi (9,511.26 km) |
| Greeley to Teteven | 5,860.50 mi (9,431.56 km) |
| Greeley to Troyan | 5,875.83 mi (9,456.24 km) |
| Greeley to Tryavna | 5,900.01 mi (9,495.14 km) |
| Greeley to Tutrakan | 5,865.69 mi (9,439.92 km) |
| Greeley to Varna | 5,949.98 mi (9,575.57 km) |
