EXHIBIT 15

LETTER IN LIEU OF CONSENT FOR REVIEW REPORT

July 28, 2021

To the Board of Directors and Shareholders of

The Boeing Company

Chicago, Illinois

We are aware that our report dated July 28, 2021, on our review of the interim financial information of The Boeing Company and subsidiaries appearing in this Quarterly Report on Form 10-Q for the quarter ended June 30, 2021, is incorporated by reference in Registration Statement Nos. 33-25332, 33-31434, 33-43854, 33-58798, 33-52773, 333-16363, 333-26867, 333-32461, 333-32491, 333-32499, 333-32567, 333-41920, 333-54234, 333-73252, 333-107677, 333-140837, 333-156403, 333-160752, 333-163637, 333-195777, 333-228097, and 333-252770 on Form S-8 and Registration Statement Nos. 333-240300, 333-249827, and 333-250000 on Form S-3.

/s/ Deloitte & Touche LLP

Chicago, Illinois