14 CFR · Part 121
378 sections, read subpart by subpart. Every section keeps its own page and exact citation.
About Part 121
Each subpart, appendix and SFAR reads as one continuous document, with its sections in the contents. Copy an exact citation or open the official eCFR text from any section.
Reflects the eCFR edition of Sep 29, 2026.
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Subpart A
§§ 121.1–121.15.
Subpart B—Certification Rules for Domestic and Flag Air Carriers [Reserved]
Subpart C—Certification Rules for Supplemental Air Carriers and Commercial Operators [Reserved]
Subpart D—Rules Governing All Certificate Holders Under This Part [Reserved]
Subpart E
§§ 121.91–121.107.
Subpart F
§§ 121.111–121.127.
Subpart G
§§ 121.131–121.141.
Subpart H
§§ 121.151–121.163.
Subpart I
§§ 121.171–121.207.
Subpart J
§§ 121.211–121.295.
Subpart K
§§ 121.301–121.359.
Subpart L
§§ 121.361–121.380a.
Subpart M
§§ 121.381–121.397.
Subpart N
§§ 121.400–121.429.
Subpart O
§§ 121.431–121.453.
Subpart P
§§ 121.461–121.467.
Subpart Q
§§ 121.470–121.473.
Subpart R
§§ 121.480–121.495.
Subpart S
§§ 121.500–121.527.
Subpart T
§§ 121.531–121.590.
Subpart U
§§ 121.591–121.667.
Subpart V
§§ 121.681–121.713.
Subpart W
§§ 121.721–121.723.
Subpart X
§§ 121.801–121.805.
Subpart Y
§§ 121.901–121.925.
Subpart Z
§§ 121.1001–121.1007.
Subpart AA
§§ 121.1101–121.1119.
Subpart BB [Reserved]
§§ 121.1200-121.1399 [Reserved]
Subpart CC [Reserved]
§§ 121.1400-121.1499 [Reserved]
Subpart DD
§ 121.1500.
Appendix A to Part 121
Appendix A to Part 121.
Appendix B to Part 121
Appendix B to Part 121.
Appendix C to Part 121
Appendix C to Part 121.
Appendix D to Part 121
Appendix D to Part 121.
Appendix E to Part 121
Appendix E to Part 121.
Appendix F to Part 121
Appendix F to Part 121.
Appendix G to Part 121
Appendix G to Part 121.
Appendix H to Part 121
Appendix H to Part 121.
Appendixes I-J to Part 121 [Reserved]
Appendix K to Part 121
Appendix K to Part 121.
Appendix L to Part 121
Appendix L to Part 121.
Appendix M to Part 121
Appendix M to Part 121.
Appendix N to Part 121 [Reserved]
Appendix O to Part 121
Appendix O to Part 121.
Appendix P to Part 121
Appendix P to Part 121.