| Boulder to Yesilyurt | 6,553.54 mi (10,546.91 km) |
| Boulder to Yesilyurt | 6,398.67 mi (10,297.66 km) |
| Boulder to Yigilca | 6,215.19 mi (10,002.38 km) |
| Boulder to Yildirim | 6,198.43 mi (9,975.40 km) |
| Boulder to Yildizeli | 6,416.45 mi (10,326.28 km) |
| Boulder to Yozgat | 6,373.23 mi (10,256.72 km) |
| Boulder to Yuksekova | 6,738.67 mi (10,844.84 km) |
| Boulder to Yumurtalik | 6,583.40 mi (10,594.96 km) |
| Boulder to Yunak | 6,349.63 mi (10,218.74 km) |
| Boulder to Yuregir | 6,557.46 mi (10,553.21 km) |
| Boulder to Yusufeli | 6,474.10 mi (10,419.06 km) |
| Boulder to Zara | 6,443.20 mi (10,369.33 km) |
| Boulder to Zile | 6,371.95 mi (10,254.67 km) |
| Boulder to Zonguldak | 6,195.84 mi (9,971.25 km) |
| Boulder to Abbots Langley | 4,661.64 mi (7,502.19 km) |
