| Thornton to Yonkers (New York) | 3,330.27 mi (5,359.56 km) |
| Thornton to Yorba Linda (California) | 5,277.17 mi (8,492.78 km) |
| Thornton to York (Pennsylvania) | 3,487.80 mi (5,613.07 km) |
| Thornton to Yorktown (Indiana) | 3,815.31 mi (6,140.14 km) |
| Thornton to Yorkville (Illinois) | 3,853.61 mi (6,201.78 km) |
| Thornton to Youngstown (Ohio) | 3,586.64 mi (5,772.13 km) |
| Thornton to Youngsville (Louisiana) | 4,575.06 mi (7,362.84 km) |
| Thornton to Ypsilanti (Michigan) | 3,645.94 mi (5,867.57 km) |
| Thornton to Yuba City (California) | 5,088.26 mi (8,188.76 km) |
| Thornton to Yucaipa (California) | 5,245.90 mi (8,442.46 km) |
| Thornton to Yucca Valley (California) | 5,221.07 mi (8,402.50 km) |
| Thornton to Yukon (Oklahoma) | 4,505.82 mi (7,251.42 km) |
| Thornton to Yulee (Florida) | 4,137.00 mi (6,657.86 km) |
| Thornton to Yuma (Arizona) | 5,248.09 mi (8,445.99 km) |
| Thornton to Zachary (Louisiana) | 4,512.98 mi (7,262.94 km) |
