SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/ifr-file-30-minutes

How long before your estimated departure time should you file an IFR flight plan?

At least 30 minutes before.

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  1. At least 10 minutes
  2. At least 2 hours
  3. At least 30 minutes ✔

Why: The AIM says to file IFR flight plans at least 30 minutes prior to the estimated time of departure. That gives time to process it and avoids delay in your clearance.

Huh, didn't know that: Nonscheduled operators flying IFR above FL 230 are asked to file at least 4 hours before departure.

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Never let an aircraft take you somewhere your brain didn't get to five minutes earlier.
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References

Answer: At least 30 minutes. The AIM says to file IFR flight plans at least 30 minutes prior to the estimated time of departure. That gives time to process it and avoids delay in your clearance.

  1. AIM 5-1 Preflight www.faa.gov/air_traffic/publications/atpubs/aim_html/chap5_section_1.html
    Pilots should file IFR flight plans at least 30 minutes prior to estimated time of departure
    Checked 2026-10-10.

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