FlightRecord

US Flight Delays in September 2025

By Sharon Ben-Moshe · US DOT data · last updated 2026-07-01

In September 2025, US airlines operated 562,439 domestic flights and 83% arrived on time, up 6.0 points from August 2025. Hawaiian Airlines led the reporting carriers at 88% on time; American Airlines trailed at 79%.

Flights
562,439
On-time
83%
arrived <15 min late
Avg delay
12 min
Cancelled
0.5%
vs Aug 2025
+6.0 pts
on-time change

Airline on-time rates in September 2025

Reporting carriers with at least 1,000 flights in the month.

AirlineOn-timevs prior monthAvg delayFlights
Hawaiian Airlines88%+2.7 pts8 min6,428
Delta Air Lines88%+4.8 pts9 min84,875
SkyWest Airlines85%+5.6 pts11 min69,406
Envoy Air84%+5.4 pts11 min25,170
Spirit Airlines84%+6.6 pts13 min15,058
PSA Airlines84%+7.6 pts14 min19,218
Alaska Airlines83%+10.7 pts9 min20,747
Republic Airways83%-0.1 pts12 min28,284
Allegiant Air83%+7.1 pts14 min6,925
United Airlines83%+6.6 pts12 min67,550
Southwest Airlines83%+4.5 pts10 min110,361
Frontier Airlines80%+9.1 pts17 min14,896
JetBlue Airways79%+4.1 pts15 min16,215
American Airlines79%+9.7 pts19 min77,306

Most delayed large airports

  1. BOSBoston74%
  2. DFWDallas/Fort Worth78%
  3. LASLas Vegas78%
  4. MIAMiami78%
  5. ORDChicago79%

Most reliable large airports

  1. HNLHonolulu91%
  2. IADWashington89%
  3. SLCSalt Lake City89%
  4. DTWDetroit88%
  5. MEMMemphis88%

Most delay-prone routes in September 2025

Routes with at least 60 flights in the month.

  1. MSYBOS31%
  2. SDFBOS36%
  3. PBIBOS45%
  4. SAVBOS46%
  5. MKEBOS47%
  6. DFWMSN50%
  7. CHSBOS51%
  8. DENBOS51%

National figures are flight-weighted averages across all reporting carriers for the month; see the methodology for definitions and limitations.

More reports

Based on 562,439 flights, 2024-062026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.