| Ontario to Yonkers (New York) | 2,418.96 mi (3,892.93 km) |
| Ontario to Yorba Linda (California) | 14.04 mi (22.60 km) |
| Ontario to York (Pennsylvania) | 2,272.01 mi (3,656.45 km) |
| Ontario to Yorktown (Indiana) | 1,808.01 mi (2,909.72 km) |
| Ontario to Yorkville (Illinois) | 1,666.13 mi (2,681.38 km) |
| Ontario to Youngstown (Ohio) | 2,065.57 mi (3,324.21 km) |
| Ontario to Youngsville (Louisiana) | 1,519.87 mi (2,446.00 km) |
| Ontario to Ypsilanti (Michigan) | 1,917.45 mi (3,085.83 km) |
| Ontario to Yuba City (California) | 417.05 mi (671.18 km) |
| Ontario to Yucaipa (California) | 32.27 mi (51.93 km) |
| Ontario to Yucca Valley (California) | 68.05 mi (109.52 km) |
| Ontario to Yukon (Oklahoma) | 1,128.78 mi (1,816.60 km) |
| Ontario to Yulee (Florida) | 2,106.15 mi (3,389.52 km) |
| Ontario to Yuma (Arizona) | 202.60 mi (326.06 km) |
| Ontario to Zachary (Louisiana) | 1,556.53 mi (2,505.00 km) |
