This section provides references for filing domestic International Civil Aviation Organization (ICAO) Filed Flight Plans (FPL) and associated flight planning messages. The information provided augments instructions found in ICAO Procedures for Air Navigation Services – Air Traffic Management (PANS-ATM) Document 4444, and incorporates published supplementary requirements, instructions and guidelines for proper filing of FPLs with FAA’s En Route Automation System (ERAS).

FAA ICAO Flight Planning Interface Reference Guide (PDF).

As supplemented by guidance found at the three (3) Reference Guide Topic links below, the Guide provides instructions for filing ICAO flight planning messages within ERAS to ensure the most efficient automation processing. These flight planning messages include:

• Filed Flight Plan (FPL);
• Modification (CHG);
• Delay (DLA); and
• Cancellation (CNL).

Reference Guide Topics

• Addressing ICAO Flight Planning Messages — clarifies the definition of U.S. domestic airspace and where to address FPLs.
• RNAV Requirements — guidance on FAA requirements for the automatic assignment of RNAV procedures and routes.
• Domestic ICAO FPL — key points to remember when filing a Domestic FPL.
• Message ACK/REJ — guidance on requirements to receive automatic acknowledgement (ACK) and/or rejection (REJ) messages in response to ICAO flight planning messages.