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  1. Capacity
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  • Austria
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  • Capacity
    • PRB monitoring
    • En route performance
      • En route ATFM delay
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      • Arrival ATFM delay
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Capacity - Austria

Download Report

PRB monitoring

▪ Austria registered 0.51 minutes of average en route ATFM delay per flight during 2024, which has been adjusted to 0.48 during the post-ops adjustment process, thus not achieving the local target value of 0.16. Delays in Austria increased by 0.36 minutes per flight year-on-year.

▪ Delays were highest in July and August, mostly driven by adverse weather conditions.

▪ The share of delayed flights with delays longer than 15 minutes in Austria increased by 11 percentage points compared to 2023 and was higher than 2019 values.

▪ The average number of IFR movements was 13% above 2019 levels in Austria in 2024.

▪ The number of ATCOs in OPS is 139, being below the 2024 plan in Vienna by 1 FTE.

▪ The yearly total of sector opening hours in Vienna ACC was 62,024, showing a 2.4% increase compared to 2023. Sector opening hours are 11.8% above 2019 levels.

▪ Vienna ACC registered 17.77 IFR movements per one sector opening hour in 2024, being 5.8% above 2019 levels.

▪ Austria registered an average airport arrival ATFM delay of 0.74 minutes per flight in 2024, thus achieving the local target of 0.82 minutes.

▪ Compared to 2023, average arrival ATFM delays in Austria were 146% higher in 2024, while the number of IFR arrivals increased by 4%.

▪ The main drivers of delays were weather, accounting for 74% of total delays, and ATC staffing, responsible for 20%.

En route performance

En route ATFM delay (KPI#1)

Focus on en route ATFM delay

Summary of capacity performance

Traffic increased again in Austria; from 1439k flights in 2023 (already above the 2019 level of 1365k flights) to 1507k flights in 2024. Austro Control had 595k minutes of en-route ATFM delay, up from 147k minutes in 2023 (1530k minutes in 2019). There were an additional 41k minutes of en route delay, originating in Vienna ACC, that were re-attributed to DFS via the NM post operations delay attribution process, according to the NMB agreement for eNM/S24 measures, to ameliorate capacity shortfalls in Karlsruhe UAC.

NSA’s assessment of capacity performance

The target was missed mainly due to an increased traffic demand that substantially exceeded the forecasts; shifted traffic flows caused by the Russian war of agression against Ukraine; frequent thunderstorms and CBs during the peak traffic period in summer, and the individually optimized trajectories of flights not necessarily following the great circle - despite an available comprehensive FRA.

Monitoring process for capacity performance

Capacity and delays are regularly monitored on a daily, weekly, monthly and yearly basis.

Capacity planning

Based on NM TFC predictions (STATFOR, NOP) capacity and performance are planned in terms of sector opening hours reflecting ATCO availability and TFC distribution.

Application of Corrective Measures for Capacity (if applicable)

The target was missed mainly due to an increased traffic demand that exceeded the forecasts substantially, shifted traffic flows caused by the Russian war of agression against Ukraine (see below), frequent thunderstorms and CBs, which mainly coincide with the peak traffic period in summer, and the individually optimized trajectories of flights not necessarily following the great circle.

No corrective measures were listed.

En route Capacity Incentive Scheme

Austro Control: The Austrian NSA reports that a penalty of €854 753 is due for failure to meet the 2024 national en route capacity target.
In accordance with Article 3(3)(a) of Implementing Regulation (EU) 2020/1627: The incentive scheme shall cover only the calendar years 2022 to 2024.

Other indicators

Focus on ATCOs in operations

ATCO training courses and ressources were exploited to the maximum extent, but not all trainees passed the courses. The rate of retiring ATCOs was higher than expected and non-OPS activities increased likewise.

Terminal performance

Arrival ATFM delay (KPI#2)

Focus on arrival ATFM delay

Austria identified six airports as subject to RP3 monitoring. According to the traffic figures at these 4 airports, only Vienna (LOWW) must be monitored for pre-departure delays. The Airport Operator Data Flow, necessary for the monitoring of these pre-departure delays, is correctly established where required and the monitoring of all capacity indicators can be performed. In global, traffic level at these airports increased by +3.9% in 2024 compared to 2023 but it was still 13% below 2019 level. ATFM slot adherence improved (2024: 99.1%; 2023: 98.8%).

Average arrival ATFM delays in 2024 was 0.74 min/arr, compared to 0.30 min/arr in 2023, reaching a value close to the target, but still below. Only Vienna and Innsbruck registered delays in 2024. Vienna observed a drastic increase, driving the national average and evolution (LOWW: 2019: 0.91 min/arr.; 2020: 0.49 min/arr.; 2021: 0.14 min/arr.; 2022: 0.19 min/arr.; 2023: 0.32 min/arr.; 2024: 0.91 min/arr.). At Vienna 75% of these delays were attributed to weather, 20% to ATC staffing issues and 4% to ATC capacity.

According to the Austrian monitoring report: Extreme WXC (CB and TS) situations were encountered at LOWW between May and September. Due to Ukraine war: Less flights entering TMA Wien from the east.

The Austrian performance plan sets a national target on arrival ATFM delay for 2024 of 0.82 min/arr. This target was met with an actual performance of 0.74 min/arr. The actual arrival ATFM delay (0.74 min/arr) falls within the deadband for the Austrian incentive scheme [0.615-1.025] so no penalty or bonus applies.

Other terminal performance indicators (PI#1-3)

Airport level
Airport name
Avg arrival ATFM delay (KPI#2)
Slot adherence (PI#1)
ATC pre departure delay (PI#2)
All causes pre departure delay (PI#3)
2020 2021 2022 2023 2024 2020 2021 2022 2023 2024 2020 2021 2022 2023 2024 2020 2021 2022 2023 2024
Graz NA NA NA NA NA 98.5% 98.0% 99.4% 99.1% 99.6% NA NA NA NA NA NA NA NA NA NA
Innsbruck 0.18 0.09 0.17 0.52 0.47 93.9% 96.5% 95.3% 95.5% 94.9% NA NA NA NA NA NA NA NA NA NA
Klagenfurt NA NA NA NA NA 97.6% 98.0% 98.4% 98.4% 98.9% NA NA NA NA NA NA NA NA NA NA
Linz NA NA NA NA NA 100.0% 97.2% 98.3% 98.2% 99.2% NA NA NA NA NA NA NA NA NA NA
Salzburg 0.04 NA 0.00 0.26 0.00 88.4% 92.3% 95.7% 96.4% 97.2% NA NA NA NA NA NA NA NA NA NA
Vienna 0.49 0.14 0.19 0.32 0.91 97.4% 98.1% 99.3% 99.4% 99.4% 0.75 0.63 0.92 0.97 0.62 8.3 9.8 14.6 14.7 16.8
Focus on performance indicators at airport level

ATFM slot adherence

All Austrian airports showed adherence close to or above 95% and the national average was 99.1%, (compared to 98.8% last year). With regard to the 0.9% of flights that did not adhere, 0.8% were early and 0.1% were late.

According to the Austrian monitoring report: ATFM slot adherence at all Austrian airports has reached an extremely high and stable value. Especially in LOWW, the CDM procedure and initial AOP has enabled the very high and continuous adherence level.

ATC pre-departure delay

Vienna is the only Austrian airport subject to the monitoring of this indicator. The performance improved in 2024 (LOWW; 2019: 1.56 min/dep.; 2020: 0.75 min/dep.; 2021: 0.63 min/dep.; 2022: 0.92 min/dep.; 2023: 0.97 min/dep.; 2024: 0.63 min/dep.) and remained under 2019 values.

According to the Austrian monitoring report: Performance is stable and has been improved even in comparison to traffic volumes of previous years, including 2019 and 2018. Main reason is full implementation of airport CDM and initial AOP.

All causes pre-departure delay

Vienna is the only Austrian airport subject to the monitoring of this indicator. The total (all causes) delay in the actual off block time at Vienna in 2023 was 16.8 min/dep., higher than the previous year (14.74 min/dep.)

According to the Austrian monitoring report: Increasing traffic caused additional ‘all cause departure delays per flight’. No ATC departure delays have been applied.

 
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