| Line number | 0874 |
| Type | 231 W |
| Engines | Pratt & Whitney 2037 |
| Mode S | A9A901 |
| Configuration | C16W44Y108 |
| Name | |
|
| Date | Registration | Remarks |
| 28/05/1999 | N721TW | roll out. |
| 14/06/1999 | N721TW | first flight. |
| 29/06/1999 | N721TW | del International Lease Finance Corporation. |
| 29/06/1999 | N721TW | lt Trans World Airlines; '7521'. |
| 30/06/1999 | N721TW | rgd to International Lease Finance Corporation. |
| 02/12/2001 | N721TW | Trans World Airlines merged into American Airlines; '5TX'. |
| 16/04/2003 | N721TW | at Dallas/Fort Worth in full American Airlines c/s (repainted after 00/04/2002). |
| 00/11/2007 | N721TW | ret International Lease Finance Corporation. |
| 15/11/2007 | N721TW | lt Delta Air Lines; '6810'. |
| 17/11/2007 | N721TW | at Atlanta in basic American Airlines c/s without titles and tail logo; red horizontal stripe painted out blue. |
| 26/12/2007 | N721TW | at Atlanta in 2007 Delta Air Lines c/s with "Delta" titles and with blended winglets (repainted/installed after 27/11/2007). |
| 14/03/2013 | N721TW | bt & rgd to Wilmington Trust Company; opb Delta Air Lines on lease. |
| 19/02/2014 | N721TW | bt Delta Air Lines Inc. |
| 21/02/2014 | N721TW | rgd to Delta Air Lines Inc. |
| 28/04/2020 | N721TW | last service: New York/JFK-Salt Lake City/SLC as DAL986. |
| 06/06/2020 | N721TW | ferried Salt Lake City/SLC-Marana/MZJ as DAL9963; for parking because of COVID-19 pandemic. |
| 06/11/2020 | N721TW | ferried Marana/MZJ-Atlanta/ATL as DAL9936. |
| 08/11/2020 | N721TW | ret to service: Atlanta/ATL-Salt Lake City/SLC as DAL912. |
| 11/12/2020 | N721TW | ferried New York/JFK-Jacksonville/VQQ as DAL9970; for maintenance. |
| 15/01/2020 | N721TW | ferried Jacksonville/VQQ-New York/JFK as DAL9962; after maintenance. |
