| Line number | 0844 |
| Type | 222 W |
| Engines | Pratt & Whitney PW2037 |
| Mode S | A7BCE2 |
| Configuration | F28PY48Y66 |
| Name | |
|
| Date | Registration | Remarks |
| 04/12/1998 | N1787B | roll out. |
| 06/01/1999 | N1787B | first flight in primer c/s. |
| 22/01/1999 | N598UA | del United Airlines; '5598'; ferried Boeing field-Oakland (weather diversion)-San Francisco. |
| 28/01/1999 | N598UA | rgd to United Airlines Inc. |
| 07/06/2008 | N598UA | at Los Angeles in 2004 United Airlines c/s with "United" titles (repainted after 24/11/2007). |
| 22/01/2009 | N598UA | bt Aircraft N598UA Trust; opb United Airlines on lease. |
| 23/01/2009 | N598UA | rgd to Aircraft N598UA Trust, Wilmington, DE. |
| 02/05/2010 | N598UA | United Airlines agreed with Continental Airlines to merge into United Airlines. |
| 01/10/2010 | N598UA | United Airlines merged with Continental Airlines into United Airlines. |
| 04/11/2012 | N598UA | at Los Angeles in 2010 United Airlines c/s with "United" titles (repainted after 14/03/2012). |
| 20/09/2013 | N598UA | at Los Angeles with blended winglets (installed after 20/04/2013). |
| 27/03/2020 | N598UA | last service: Boston/BOS-San Francisco/SFO as UAL431. |
| 29/03/2020 | N598UA | ferried San Francisco/SFO-Roswell/ROW as UAL2726; for parking because of COVID-19 pandemic. |
