European Route Network Improvement Plan (ERNIP) - Monitoring Report - AIRAC 2303

ERNIP Monthly report cover
ERNIP monitoring report background image

Our monthly European route network implementation plan (ERNIP) monitoring report provides an overview of the airspace design improvements applied by States during the past AIRAC cycle and an analysis of their potential and real world effects.

Potential routes offered

The potential savings offered extended during AIRAC cycle 2303:

470,000 NMs

flown vs equivalent 2022 AIRAC cycle

2,800 tonnes

fuel used

9,400 tons

CO2 emitted



Real-world performance

Based on our filed flight plan indicator, the actual losses calculated during AIRAC 2303 were:

1,900,000 NMs

flown more compared to shortest available route

11,400 tonnes

more fuel used

38,000 tons

more CO2 emitted



Key reasons

Potential causes having an impact on flight planning/ airline choices: 

  • Weather
  • Airspace availability
  • Industrial action
  • Closed areas in adjacent airspace(s)
  • Capacity issues in the network

For more details, download our monitoring report.


EUROCONTROL Monitoring Report - AIRAC 2303