| 1868 | The first section of what is now the District line begins. It runs between ‣ and ‣ |
|---|---|
| 1869 | New tracks open between ‣ and ‣ |
| 1874 | The line extends to ‣, ‣ in 1877 and ‣ in 1879 |
| 1885 | The two-year old Ealing to Windsor service ends |
| 1884 | The line extends to Mark Lane (now ‣) |
| 1910 | The line extends to ‣, following an earlier extension to Hounslow (in 1884) |