Exhibit 99.1

Wesco Aircraft Holdings, Inc. Announces Underwriters Exercise of Over-Allotment Option in Offering by The Carlyle Group

VALENCIA, CA — (BUSINESS WIRE) — May 23, 2013 — Wesco Aircraft Holdings, Inc. (“Wesco Aircraft” or the “Company”) (NYSE: WAIR) today announced that in connection with the previously announced public offering of 15,000,000 shares of the Company’s common stock by affiliates of The Carlyle Group (“Carlyle”), the underwriters have exercised their option to purchase an additional 2,250,000 shares from Carlyle at an offering price of $16.00 per share. As a result, Carlyle will sell a total of 17,250,000 shares in the offering. The offering is expected to close and settle on May 29, 2013. Carlyle and the directors and officers of the Company have entered into lock-up agreements placing certain restrictions on their sale or transfer of shares of common stock for a period of 75 days or, in certain cases, 60 days from the date of the offering. The Company is not selling any shares of common stock in the offering and will not receive any of the proceeds from the offering of shares by Carlyle.

Barclays Capital Inc., J.P. Morgan Securities LLC, Citigroup Global Markets Inc., Morgan Stanley & Co. LLC and William Blair & Company, L.L.C. are acting as joint book-running managers and Barclays Capital Inc. and J.P. Morgan Securities LLC are serving as representatives of the several underwriters for the offering.

A shelf registration statement (including a prospectus) relating to the offering of the common stock has previously been filed with the U.S. Securities and Exchange Commission and has become effective. Before investing, you should read the prospectus and other documents filed with the Securities and Exchange Commission for information about Wesco Aircraft and this offering. A copy of the prospectus may be obtained from Barclays Capital Inc., c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, Barclaysprospectus@broadridge.com, or by telephone at (888) 603-5847 or from J.P. Morgan Securities LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, or by telephone at (866) 803-9204.

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

About Wesco Aircraft

Wesco Aircraft is one of the world’s largest distributors and providers of comprehensive supply chain management services to the global aerospace industry. The Company’s services range from traditional distribution to the management of supplier relationships, quality assurance, kitting, just-in-time delivery and point-of-use inventory management. The Company believes it offers one of the world’s broadest inventories of aerospace parts, comprised of more than 500,000 different stock keeping units, including hardware, bearings, tools, electronic components and machined parts. Wesco Aircraft has more than 1,200 employees across 42 locations in 12 countries.

Forward Looking Statements

Certain information in this news release contains forward-looking statements with respect to the Company’s expectations or beliefs concerning future events. In some cases, you can identify forward-looking statements by terminology such as “guidance,” “may,” “will,” “could,” “should,” “forecasts,” “expects,” “intends,” “plans,” “anticipates,” “projects,” “outlook,” “believes,” “estimates,” “predicts,” “potential,” “continue,” “preliminary,” or the negative of these terms or other comparable terminology. Although the Company believes that such forward-looking statements are reasonable, it cannot assure you that any forward-looking statements will prove to be correct. Such forward-looking statements involve

risks, uncertainties, estimates and assumptions that may cause the Company’s actual results, performance or achievements to be materially different than those set forth in this news release. In particular, there can be no assurances that the offering by Carlyle will be consummated. Additional information relating to factors that may cause actual results to differ from the Company’s forward-looking statements can be found in the Company’s filings with the Securities and Exchange Commission, including the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2012, as supplemented by the Company’s Quarterly Reports on Form 10-Q for the quarterly periods ended December 31, 2012 and March 31, 2013. The Company undertakes no obligation to update or revise forward-looking statements after the day of the release as a result of new information, future events or developments except as required by law.

Contact Information

Mark Davidson

Investor Relations

661-802-5090

Mark.Davidson@wescoair.com