Exhibit 99.1 CONTACT: Scott B. Flaherty Chief Financial Officer NEWS RELEASE (561) 349-9989 Record Results for Willis Lease Finance Corporation in 2023 COCONUT CREEK, FL — March 13, 2024 — Willis Lease Finance Corporation (NASDAQ: WLFC) (“WLFC”) today reported record annual total revenues of $418.6 million and pre-tax income of$67.1 million. For the year ended December 31, 2023, aggregate, core lease rent and maintenance reserve revenues were at an all-time record of $346.8 million, up 41.0% as compared to ...