The ICAO Flight Plan Form

The ICAO flight plan (FPL) is the standard format for filed flight plans worldwide. The United States retired its old domestic form and now uses the ICAO format for all flight plans, so understanding the fields matters even for domestic IFR. The FPL is defined in ICAO Doc 4444 (PANS-ATM); its ordering rules are part of Annex 2.

The main items

• Item 7 — Aircraft identification: the registration or the ICAO callsign (airline + flight number).
• Item 8 — Flight rules and type of flight: I (IFR), V (VFR), Y or Z (changing), and the flight category (G general, S scheduled, N non-scheduled…).
• Item 9 — Number, type and wake turbulence: how many aircraft, the ICAO type designator (e.g. C172, B738), and the wake category (L/M/H/J).
• Item 10 — Equipment and capabilities: COM/NAV/approach aids and PBN capability, then a slash and the surveillance (transponder/ADS-B) codes. This drives what routings and approaches you can be given.
• Item 13 — Departure aerodrome and time: the ICAO code and the off-block/EOBT time in UTC.
• Item 15 — Route: cruising speed, requested cruising level, and the route (airways, waypoints, DCT segments).
• Item 16 — Destination, EET and alternates: destination ICAO code, total estimated elapsed time, and one or two alternates.
• Item 18 — Other information: free-text coded fields such as DOF (date of flight), PBN/, REG/, EET/ and remarks.
• Item 19 — Supplementary information: endurance, persons on board, and emergency/survival equipment (not transmitted with the plan but held for search and rescue).

Why the detail matters

Items 10 and 18 in particular tell ATC exactly what your aircraft can do; getting the equipment codes wrong can cost you the routing or approach you wanted. When you file for a great-circle route or a specific city pair, the FPL is where those capabilities are declared. See also ICAO vs FAA key differences.

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*Reference and training only — not for navigation or as legal advice. Always consult the current 14 CFR, the AIM, your aircraft’s POH/AFM and a certificated flight instructor.*