14 CFR · Part 99
14 CFR § 99.17
Deviation from flight plans and ATC clearances and instructions.
No pilot may deviate from the provisions of an ATC clearance or ATC instruction except in accordance with § 91.123 of this chapter.
No pilot may deviate from the filed IFR flight plan when operating an aircraft in uncontrolled airspace unless that pilot notifies an appropriate aeronautical facility before deviating.
No pilot may deviate from the filed DVFR flight plan unless that pilot notifies an appropriate aeronautical facility before deviating.
Referenced By
Interpretations of This Section (1)
Documents that cite this section, found in their catalog metadata or text. Listed by date, not by significance.
Regulations Referenced
Reflects the eCFR edition current as of October 15, 2026. Retrieved from ecfr.gov on October 29, 2026.
Primary Source