Air Transport Services Group, Inc. Announces Secondary Public Offering by Selling Shareholder

WILMINGTON, OH – May 31, 2017 - Air Transport Services Group, Inc. (NASDAQ: ATSG) today announced that one of its existing stockholders (the "selling stockholder") intends to offer for sale 3,806,374 shares of the Company's common stock in an underwritten secondary offering pursuant to the Company's automatic shelf registration statement filed today with the Securities and Exchange Commission ("SEC"), of which ATSG intends to repurchase from the underwriter 380,637 shares of common stock. The selling stockholder will receive all of the net proceeds from the offering. No shares are being sold by ATSG in the offering.

BofA Merrill Lynch will act as underwriter for the offering.

ATSG filed an automatic shelf registration statement on Form S-3 (including a prospectus) with the SEC relating to the offering. The offering will be made only by means of a prospectus supplement and the accompanying prospectus. Before you invest, you should read the registration statement, prospectus, prospectus supplement, and documents incorporated by reference in that registration statement for more complete information about ATSG and the offering. You may obtain these documents free of charge by visiting EDGAR on the SEC website at www.sec.gov. When available, copies of the prospectus supplement and accompanying prospectus related to the offering may also be obtained from: BofA Merrill Lynch, NC1-004-03-43, 200 North College Street, 3rd floor, Charlotte NC 28255-0001, Attn: Prospectus Department, Email: dg.prospectus_requests@baml.com.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of these securities in any state or other jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or other jurisdiction.