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☑ ☐ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - Q QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31 , 2021 Or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Delaware Commission File Number 001-5424 ▲ DELTA DELTA AIR LINES , INC . ( Exact name of registrant as specified in its charter ) ( State or other jurisdiction of incorporation or organization ) Post Office Box 20706 Atlanta , Georgia ( Address of principal executive offices ) Title of each class 58-0218548 ( I.R.S. Employer Identification No. ) 30320-6001 ( Zip Code ) Registrant's telephone number , including area code : ( 404 ) 715-2600 Securities registered pursuant to Section 12 ( b ) of the Act : Common Stock , par value $ 0.0001 per share Trading Symbol DAL Name of each exchange on which registered New York Stock Exchange Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes No Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of “ large accelerated filer , " " accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Accelerated filer □ Large accelerated filer ✓ Smaller reporting company □ Non - accelerated filer Emerging growth company ☐ If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes No ☑ Number of shares outstanding by each class of common stock , as of March 31 , 2021 : Common Stock , $ 0.0001 par value - 639,661,387 shares outstanding This document is also available through our website at http://ir.delta.com/ .