| 04/03/1985 | N503US | roll out. |
| 05/04/1985 | N503US | first flight. |
| 22/04/1985 | N503US | del Northwest Orient Airlines; '5503'; named "City of Detroit". |
| 01/10/1986 | N503US | company renamed Northwest Airlines. |
| 24/02/1994 | N503US | bt General Electric Capital Corporation; opb Northwest Airlines on lease. |
| 25/02/1994 | N503US | rgd to Wilmington Trust Company. |
| 00/06/1995 | N503US | at Minneapolis in 1989 Northwest Airlines c/s. |
| 02/05/2003 | N503US | ferried Minneapolis-Marana as NWA9750; for storage. |
| 00/00/2003 | N503US | returned to service (before 13/08/2003). |
| 22/11/2003 | N503US | at Portland in 2003 Northwest Airlines c/s (repainted after 13/08/2003). |
| 14/11/2005 | N503US | bt Northwest Airlines Inc. |
| 16/11/2005 | N503US | rgd to Northwest Airlines Inc. |
| 29/10/2008 | N503US | Northwest Airlines merged into Delta Air Lines. |
| 28/08/2010 | N503US | at Las Vegas in 2007 Delta Air Lines c/s with "Delta" titles (repainted after 01/04/2010). |
| 04/05/2013 | N503US | last service: Fort Lauderdale-Atlanta as DAL1527. |
| 05/05/2013 | N503US | ferried Atlanta-Marana as DAL9934 (TT: 87872 hours; 36971 cycles); for storage. |
| 25/10/2013 | N503US | at Marana; stored; missing both engines. |
| 05/01/2014 | N503US | at Marana in full Delta Air Lines c/s; missing both engines and all doors. |
| 28/03/2015 | N503US | at Marana; stored. |
