Feasibility of a long term global aspirational goal (LTAG) for international aviation

In its 40th Session (2019), the ICAO Assembly requested the ICAO Council to continue to explore the feasibility of a long-term global aspirational goal for international aviation (LTAG), through conducting detailed studies assessing the attainability and impacts of any goals proposed, including the impact on growth as well as costs in all countries, especially developing countries, for the progress of the work to be presented to the 41st Session of the ICAO Assembly (2022). Assessment of long-term goals should include information from Member States on their experiences working towards the medium term goal (Reference: ICAO Assembly Resolution A40-18, paragraph 9). '

This website provides detailed information on ICAO's work on LTAG, which is summarized in the following video.

ICAO Doc 10178 - Report of the HLM-LTAG

The Report of the High-Level Meeting on the Feasibility of a Long-Term Aspirational Goal for International Aviation CO2 Emissions Reductions (HLM-LTAG) is available in all ICAO languages as ICAO Doc 10178.

LTAG Report

The LTAG Report present the background, methodologies, results and interpretations of the LTAG feasibility study developed by the ICAO CAEP. For transparency and comprehensiveness, a set of Appendixes is also available to provide more detailed information on modelling approaches, methodologies, models, assumptions, and the results.

The LTAG report is now available, in all the 6 ICAO Languages.

LTAG Data Spreadsheet


In addition to the LTAG Report, data developed by ICAO CAEP, as provided in the LTAG report, is available to support States that wish to their own analysis, noting that any additional analysis carried out by States will not be considered as part of the CAEP's work. 

​LTAG -  Questions and Answers 

A compilation of the questions and answers exchanged, both verbally and in written format, during the first day of the five regional 2022 ICAO LTAG GLADs sessions has been published here.


Council briefing - LTAG report

A briefing outlining the approach, methodology, and high-level results and observations of the LTAG analysis is available at ICAO.TV. 

Briefing on LTAG Feasibility Report by CAEP - Watch on ICAO.TV

Videos - LTAG Report Introduction

A description of the LTAG report is provided in the following videos, also in all the 6 ICAO Languages.


2022 LTAG GLADs - 28 March to 8 April 2022

The ICAO Global Aviation Dialogues on Long-term Aspirational Goal (LTAG-GLADs) aim to raise awareness on the ICAO work on LTAG and facilitate the exchange of views amongst Member States. Click here for more information.

2022 ICAO Stocktaking – 18 July 2022

The 2022 ICAO Stocktaking will provide a further opportunity on the progress of innovations in aviation CO2 emissions reductions, and enable the sharing of the latest relevant information on technology, operations and fuels. This will set the scene for the subsequent ICAO High-level Meeting on the Feasibility of a Long-term Global Aspirational Goal (HLM-LTAG), to be held as a hybrid event from 19 to 22 July 2022. 

LTAG High-level Meeting – 19 to 22 July 2022

The ongoing work is summarized in the diagram below: 

The general timeline of LTAG work is provided in the image below:

LTAG timelines

Work is ongoing in ICAO to:

  • Facilitate the involvement of relevant stakeholders outside the aviation sector to collect all information needed to support the exploration of the feasibility of a LTAG.
  • Ensure that the best expertise is available for the assessment of the data, for the development of scenarios and for the assessment of the cost and benefits of scenarios.
  • Keep ICAO Governing bodies informed and consulted during the process
  • Ensure a transparent and inclusive process when consulting with States; and
  • Provide a forum for the agreement of the possible options prior to the next ICAO Assembly.

All relevant stakeholders are invited to contribute to this ICAO work by submitting information through the ICAO Stocktaking Process.

ICAO is also working to share publically-available information on in-sector CO2 emissions reductions activities through the ICAO in-sector aviation CO2 emissions reduction initiatives tracker tool. This tracker tool compliments the LTAG work by showcasing activites related to three streams of work: technology, operations, and sustainable aviation fuels. 

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