Cover Page
Mar. 10, 2022
Cover page. [Abstract]  
Document Type 8-K
Document Period End Date Mar. 10, 2022
Entity Registrant Name SPIRIT AIRLINES, INC.
Entity Incorporation, State or Country Code DE
Entity File Number 001-35186
Entity Tax Identification Number 38-1747023
Entity Address, Address Line One 2800 Executive Way
Entity Address, City or Town Miramar,
Entity Address, State or Province FL
Entity Address, Postal Zip Code 33025
City Area Code 954
Local Phone Number 447-7920
Written Communications true
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.0001 par value
Trading Symbol SAVE
Security Exchange Name NYSE
Entity Emerging Growth Company false
Entity Central Index Key 0001498710
Amendment Flag false