Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement on Form S-8 of our reports dated March 31, 2010, relating to the financial statements and financial statement schedule of Air Transport Services Group, Inc. and subsidiaries (the “Company”) (which report expresses an unqualified opinion and includes explanatory paragraphs relating to the Company’s two principal customers, and the Company’s defined benefit plans’ investments whose fair values have been estimated by management in the absence of readily determinable fair values,) and the effectiveness of the Company’s internal control over financial reporting, appearing in the Annual Report on Form 10-K of the Company for the year ended December 31, 2009.

/s/ DELOITTE & TOUCHE LLP

Dayton, Ohio

May 28, 2010