Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We have issued our reports dated March 14, 2024, with respect to the consolidated financial statements and internal control over financial reporting included in the Annual Report of Willis Lease Finance Corporation on Form 10-K for the year ended December 31, 2023. We consent to the incorporation by reference of said reports in the Registration Statements of Willis Lease Finance Corporation on Forms S-8 (File No. 333-263530, File No. 333-226695, File No. 333-221463, File No. 333-219572, File No. 333-170049, File No. 333-142914 and File No. 333-118127).

/s/ Grant Thornton LLP

Cincinnati, Ohio

March 14, 2024