Exhibit 15

AWARENESS LETTER OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

October 15, 2024

The Board of Directors and Shareholders of

The Boeing Company

929 Long Bridge Drive

Arlington, VA 22202

We are aware that our reports dated April 24, 2024, and July 31, 2024, on our review of interim financial information of The Boeing Company and subsidiaries appearing in The Boeing Company’s Quarterly Reports on Form 10-Q for the quarters ended March 31, 2024, and June 30, 2024, respectively, are incorporated by reference in this Registration Statement.

/s/ Deloitte & Touche LLP

Chicago, Illinois