Monthly Airspace Report
September 2026
↑ 18% more disrupted time than the previous month
Partial data - this month started before permanent record-keeping began (9 September 2026).
485
TOTAL EVENTS
1692h 56m
DISRUPTED TIME
59
GROUND STOPS
BOS
WORST AIRPORT
Worst Single Day
17 September— 159h 34m of combined disruption across all airports
Longest Single Incident
EMA Airport Closed
24h · ATC Restriction
Leading Causes
Notable Incidents (RED-level)
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
Flow Control Restriction · Widespread Delays · 10 Sept
Ground Delay Program · disabled aircraft on the runway · 10 Sept
Ground Delay Program · wind · 11 Sept
Ground Delay Program · airport volume · 7 Sept
Airport Closed · ATC Restriction · 3 Sept
Ground Stop · thunderstorms · 3 Sept
Ground Delay Program · runway construction · 16 Sept