v3.26.1
Document And Entity Information
Jun. 04, 2026
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jun. 04, 2026
Entity Registrant Name Firefly Aerospace Inc.
Entity Central Index Key 0001860160
Entity Emerging Growth Company true
Entity File Number 001-42789
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 81-5194980
Entity Address, Address Line One 2203 Scottsdale Drive
Entity Address, City or Town Leander
Entity Address, State or Province TX
Entity Address, Postal Zip Code 78641
City Area Code 512
Local Phone Number 893-5570
Entity Information, Former Legal or Registered Name N/A
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Ex Transition Period false
Title of 12(b) Security Common stock, par value $0.0001 per share
Trading Symbol FLY
Security Exchange Name NASDAQ