Delta operates the second-largest fleet of Boeing 757-300s in service along with the largest fleet of 757-200s.

Boeing stopped the 757 because there was no demand for it. This is an old discussion and the simple conclusion to that ...

After last operating its Boeing 757-300 aircraft ... 55 more passengers than the MAX 9’s capacity of 179. In a two-class format, the 757-300 has 24 seats in first class and 210 seats in economy.