Datasets in CSV format

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AIU provides CSV files for some of its data sets so as to make it possible to automate download and processing by interested parties.

The file names adhere to the following convention:

<dataset group>_<YYYY>.csv

The available data sets are:

ATC Pre-Departure Delays (from 2016), <dataset group>=atc_pre_departure_delays

Name	Size (bytes)
atc_pre_departure_delays_2016.csv	5.51M
atc_pre_departure_delays_2017.csv	6.47M
atc_pre_departure_delays_2018.csv	6.49M
atc_pre_departure_delays_2019.csv	6.47M
atc_pre_departure_delays_2020.csv	5.96M
atc_pre_departure_delays_2021.csv	6.29M
atc_pre_departure_delays_2022.csv	6.43M
atc_pre_departure_delays_2023.csv	6.44M
atc_pre_departure_delays_2024.csv	6.47M
atc_pre_departure_delays_2025.csv	534.31K

All Pre-Departure Delays (from 2020), <dataset group>=all_pre_departure_delays

Name	Size (bytes)
all_pre_departure_delays_2020.csv	5.69M
all_pre_departure_delays_2021.csv	5.98M
all_pre_departure_delays_2022.csv	6.06M
all_pre_departure_delays_2023.csv	6.08M
all_pre_departure_delays_2024.csv	6.12M
all_pre_departure_delays_2025.csv	509.63K

ATFM Slot Adherence (from 2016), <dataset group>=atfm_slot_adherence

Name	Size (bytes)
atfm_slot_adherence_2016.csv	5.68M
atfm_slot_adherence_2017.csv	5.68M
atfm_slot_adherence_2018.csv	5.70M
atfm_slot_adherence_2019.csv	5.71M
atfm_slot_adherence_2020.csv	5.28M
atfm_slot_adherence_2021.csv	5.52M
atfm_slot_adherence_2022.csv	5.65M
atfm_slot_adherence_2023.csv	5.67M
atfm_slot_adherence_2024.csv	5.70M
atfm_slot_adherence_2025.csv	731.08K

CO2 Emission by State (from 2010), <dataset group>=co2_emmissions_by_state

Name	Size (bytes)
co2_emmissions_by_state_2010.csv	19.98K
co2_emmissions_by_state_2011.csv	20.16K
co2_emmissions_by_state_2012.csv	20.25K
co2_emmissions_by_state_2013.csv	20.23K
co2_emmissions_by_state_2014.csv	20.69K
co2_emmissions_by_state_2015.csv	20.71K
co2_emmissions_by_state_2016.csv	20.73K
co2_emmissions_by_state_2017.csv	20.99K
co2_emmissions_by_state_2018.csv	21.27K
co2_emmissions_by_state_2019.csv	21.29K
co2_emmissions_by_state_2020.csv	20.92K
co2_emmissions_by_state_2021.csv	21.59K
co2_emmissions_by_state_2022.csv	21.74K
co2_emmissions_by_state_2023.csv	21.82K
co2_emmissions_by_state_2024.csv	22.09K
co2_emmissions_by_state_2025.csv	1.93K

Horizontal Flight Efficiency (from 2015), <dataset group>=horizontal_flight_efficiency

Name	Size (bytes)
horizontal_flight_efficiency_2015.csv	2.91M
horizontal_flight_efficiency_2016.csv	4.44M
horizontal_flight_efficiency_2017.csv	4.43M
horizontal_flight_efficiency_2018.csv	4.34M
horizontal_flight_efficiency_2019.csv	4.40M
horizontal_flight_efficiency_2020.csv	4.35M
horizontal_flight_efficiency_2021.csv	4.37M
horizontal_flight_efficiency_2022.csv	4.41M
horizontal_flight_efficiency_2023.csv	4.42M
horizontal_flight_efficiency_2024.csv	4.44M
horizontal_flight_efficiency_2025.csv	384.02K

Vertical Flight Efficiency (from 2015), <dataset group>=vertical_flight_efficiency

Name	Size (bytes)
vertical_flight_efficiency_2015.csv	2.40M
vertical_flight_efficiency_2016.csv	2.47M
vertical_flight_efficiency_2017.csv	2.44M
vertical_flight_efficiency_2018.csv	2.42M
vertical_flight_efficiency_2019.csv	2.43M
vertical_flight_efficiency_2020.csv	2.26M
vertical_flight_efficiency_2021.csv	2.43M
vertical_flight_efficiency_2022.csv	2.61M
vertical_flight_efficiency_2023.csv	4.13M
vertical_flight_efficiency_2024.csv	2.59M
vertical_flight_efficiency_2025.csv	207.92K

Taxi-in Additional Time (from 2018), <dataset group>=taxi_in_additional_time

Name	Size (bytes)
taxi_in_additional_time_2018.csv	86.8K
taxi_in_additional_time_2019.csv	86.9K
taxi_in_additional_time_2020.csv	84.8K
taxi_in_additional_time_2021.csv	85.4K
taxi_in_additional_time_2022.csv	86.6K
taxi_in_additional_time_2023.csv	87.0K
taxi_in_additional_time_2024.csv	87.2K

Taxi-out Additional Time (from 2018), <dataset group>=taxi_out_additional_time

Name	Size (bytes)
taxi_out_additional_time_2018.csv	87.2K
taxi_out_additional_time_2019.csv	87.1K
taxi_out_additional_time_2020.csv	85.7K
taxi_out_additional_time_2021.csv	86.3K
taxi_out_additional_time_2022.csv	87.6K
taxi_out_additional_time_2023.csv	88.3K
taxi_out_additional_time_2024.csv	88.1K

ASMA Additional Time (from 2018), <dataset group>=asma_additional_time

Name	Size (bytes)
asma_additional_time_2018.csv	93.1K
asma_additional_time_2019.csv	93.9K
asma_additional_time_2020.csv	92.6K
asma_additional_time_2021.csv	93.3K
asma_additional_time_2022.csv	93.7K
asma_additional_time_2023.csv	94.8K
asma_additional_time_2024.csv	94.9K

Airport Traffic (from 2016), <dataset group>=airport_traffic

Name	Size (bytes)
airport_traffic_2016.csv	5.82M
airport_traffic_2017.csv	5.84M
airport_traffic_2018.csv	6.91M
airport_traffic_2019.csv	6.93M
airport_traffic_2020.csv	6.37M
airport_traffic_2021.csv	6.76M
airport_traffic_2022.csv	6.88M
airport_traffic_2023.csv	6.89M
airport_traffic_2024.csv	6.94M
airport_traffic_2025.csv	582.81K

Legacy CSVs

AIU provides some data sets in CSV format (compressed using bzip2).

These files will be migrated to pure CSV files with a new file name similar to the ones above.

The file name convention we adopted is as follows:

<dataset group>_<YYYY>.csv.bz2

where

<dataset group> = <dataset>_<group>

For example ert_dly_ansp_2012.csv.bz2 refers to en-rote delays data set with ANSP breakdown for year 2012.

The datasets made available are:

Airport Arrival ATFM Delays (from 2014): <dataset group>=apt_dly

Name	Size (bytes)
apt_dly_2014.csv.bz2	372.3K
apt_dly_2015.csv.bz2	381.3K
apt_dly_2016.csv.bz2	392.9K
apt_dly_2017.csv.bz2	398.8K
apt_dly_2018.csv.bz2	401.8K
apt_dly_2019.csv.bz2	404.0K
apt_dly_2020.csv.bz2	321.2K
apt_dly_2021.csv.bz2	347.3K
apt_dly_2022.csv.bz2	381.9K
apt_dly_2023.csv.bz2	461.1K
apt_dly_2024.csv.bz2	470.4K
apt_dly_2025.csv.bz2	33.4K

Daily en-route delays, <dataset>=ert_dly

ANSP group (see list of ANSP’s considered by PRU) (from 2008), <group>=ansp

Name	Size (bytes)
ert_dly_ansp_2008.csv.bz2	101.81K
ert_dly_ansp_2009.csv.bz2	91.18K
ert_dly_ansp_2010.csv.bz2	97.90K
ert_dly_ansp_2011.csv.bz2	91.80K
ert_dly_ansp_2012.csv.bz2	94.69K
ert_dly_ansp_2013.csv.bz2	93.17K
ert_dly_ansp_2014.csv.bz2	93.82K
ert_dly_ansp_2015.csv.bz2	94.04K
ert_dly_ansp_2016.csv.bz2	96.93K
ert_dly_ansp_2017.csv.bz2	100.21K
ert_dly_ansp_2018.csv.bz2	112.30K
ert_dly_ansp_2019.csv.bz2	114.09K
ert_dly_ansp_2020.csv.bz2	67.49K
ert_dly_ansp_2021.csv.bz2	73.74K
ert_dly_ansp_2022.csv.bz2	106.82K
ert_dly_ansp_2023.csv.bz2	30.41K
ert_dly_ansp_2024.csv-ESSP6376.bz2	110.61K
ert_dly_ansp_2024.csv.bz2	118.56K
ert_dly_ansp_2025.csv.bz2	8.24K

Country FIR group (from 2013), <group>=fir

Name	Size (bytes)
ert_dly_fir_2013.csv.bz2	90.0K
ert_dly_fir_2014.csv.bz2	89.7K
ert_dly_fir_2015.csv.bz2	127.7K
ert_dly_fir_2016.csv.bz2	132.7K
ert_dly_fir_2017.csv.bz2	137.2K
ert_dly_fir_2018.csv.bz2	157.2K
ert_dly_fir_2019.csv.bz2	156.5K
ert_dly_fir_2020.csv.bz2	89.4K
ert_dly_fir_2021.csv.bz2	97.3K
ert_dly_fir_2022.csv.bz2	147.9K
ert_dly_fir_2023.csv.bz2	41.3K
ert_dly_fir_2024.csv.bz2	164.1K
ert_dly_fir_2025.csv.bz2	10.8K

Horizontal Flight Efficiency (from 2014), <dataset group>=hfe

Name	Size (bytes)
hfe_2014.csv.bz2	532.1K
hfe_2015.csv.bz2	530.6K
hfe_2016.csv.bz2	802.5K
hfe_2017.csv.bz2	803.2K
hfe_2018.csv.bz2	787.9K
hfe_2019.csv.bz2	801.8K
hfe_2020.csv.bz2	772.9K
hfe_2021.csv.bz2	782.8K
hfe_2022.csv.bz2	801.8K
hfe_2023.csv.bz2	805.3K
hfe_2024.csv.bz2	807.5K
hfe_2025.csv.bz2	68.5K