UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 001-35186 Spirit Airlines, Inc. (Exact name of registrant as specified in its charter) Delaware 38-1747023 (State or other jurisdiction of incorporation ...

Spirit Airlines (NYSE:SAVE) Q4 2018 Earnings Conference Call February 6, 2019 9:30 AM ET Company Representatives Ted Christie - Chief Executive Officer Matt Klein - Chief Commercial Officer Scott Haralson - Chief Financial Officer Thomas Canfield - General Counsel John Bendoraitis - Chief Operating Officer DeAnne Gabel - Investor Relations Conference Call Participants Andrew Didora - Bank of America Merrill Lynch Jack Atkins - Stephens Duane Pfennigwerth - Evercore Partners Joe Caiado - Credit Suisse Hunter ...