    <SEC-DOCUMENT>0001193125-26-161474-index.html : 20260417
    <SEC-HEADER>0001193125-26-161474.hdr.sgml : 20260417
    <ACCEPTANCE-DATETIME>20260417160112
    ACCESSION NUMBER:		0001193125-26-161474
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		18
    CONFORMED PERIOD OF REPORT:	20260604
    FILED AS OF DATE:		20260417
    DATE AS OF CHANGE:		20260417

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Firefly Aerospace Inc.
    		CENTRAL INDEX KEY:			0001860160
    		STANDARD INDUSTRIAL CLASSIFICATION:	GUIDED MISSILES & SPACE VEHICLES & PARTS [3760]
    		ORGANIZATION NAME:           	04 Manufacturing
    		EIN:				815194980
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-42789
    		FILM NUMBER:		26871437

    	BUSINESS ADDRESS:
    		STREET 1:		1320 ARROW POINT DR
    		STREET 2:		SUITE 109
    		CITY:			CEDAR PARK
    		STATE:			TX
    		ZIP:			78613
    		BUSINESS PHONE:		5122776959

    	MAIL ADDRESS:
    		STREET 1:		1320 ARROW POINT DR
    		STREET 2:		SUITE 109
    		CITY:			CEDAR PARK
    		STATE:			TX
    		ZIP:			78613
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>fly-20260417.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: fly-20260417.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>img262042169_0.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: img262042169_0.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>img262042169_1.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: img262042169_1.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>img262042169_2.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: img262042169_2.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>img262042169_3.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: img262042169_3.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>img262042169_4.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: img262042169_4.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>img262042169_5.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: img262042169_5.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>img262042169_6.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: img262042169_6.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>9
    <FILENAME>fly-20260417.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT
    <TEXT>
    Document 9 - file: fly-20260417.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>11
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 11 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>12
    <FILENAME>R2.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 12 - file: R2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>13
    <FILENAME>R3.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 13 - file: R3.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>14
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 14 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>15
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 15 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>17
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 17 - file: FilingSummary.html

    Document 17 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>19
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 19 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>20
    <FILENAME>0001193125-26-161474-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 20 - file: 0001193125-26-161474-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>21
    <FILENAME>fly-20260417_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 21 - file: fly-20260417_htm.html

    Document 21 - RAW XML: fly-20260417_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>