Monthly Airspace Report
September 2026
↑ 39% more disrupted time than the previous month
Partial data - this month started before permanent record-keeping began (9 September 2026).
597
TOTAL EVENTS
1992h 32m
DISRUPTED TIME
72
GROUND STOPS
BOS
WORST AIRPORT
Worst Single Day
17 September— 168h 45m of combined disruption across all airports
Longest Single Incident
LTN Airport Closed
24h 4m · ATC Restriction
Leading Causes
Notable Incidents (RED-level)
Airport Closed · ATC Restriction · 18 Sept
Airport Closed · ATC Restriction · 10 Sept
Airport Closed · ATC Restriction · 16 Sept
Airport Closed · ATC Restriction · 2 Sept
Airport Closed · ATC Restriction · 14 Sept
Airport Closed · ATC Restriction · 15 Sept
Airport Closed · ATC Restriction · 13 Sept
Airport Closed · ATC Restriction · 9 Sept
Airport Closed · ATC Restriction · 17 Sept
Airport Closed · ATC Restriction · 19 Sept
Flow Control Restriction · Widespread Delays · 10 Sept
Airport Closed · ATC Restriction · 20 Sept
Ground Delay Program · disabled aircraft on the runway · 10 Sept
Ground Delay Program · wind · 11 Sept
Ground Delay Program · airport volume · 7 Sept