Delta Air Lines in September 2023

85.6%arrived on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In September 2023, Delta Air Lines (DL) reported 81,701 scheduled domestic flights. 85.6% arrived on time, 0.5% were cancelled and 0.2% diverted.

All reporting carriers together recorded 80.1% on time and 1.2% cancelled that month, so the carrier was 5.5 points above the combined figure.

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 49%, late-arriving aircraft 27% and national aviation system 20%.

On time 85.6%
Arrived 15+ minutes late 13.7%
Cancelled 0.5%
Diverted 0.2%

Every scheduled domestic flight reported by Delta Air Lines in September 2023.

September 2023 against a year earlier, the carrier's year and all carriers

Measure	Sep 2023	Year earlier	DL, 12 months to Jul 2026	All carriers, Sep 2023
Arrived on time	85.6%	—	79.9%	80.1%
Departed on time	85.2%	—	80.6%	80.5%
Cancelled	0.5%	—	1.7%	1.2%
Average arrival delay	1.1 min	—	3.9 min	5.4 min
Scheduled flights a day	2,723	—	2,846	18,978
Scheduled flights	81,701	—	1,038,644	569,338

141 airports and 894 routes had DL flights that month.

Busiest airports that month

Airport	Departures	On time	Avg arrival delay	Cancelled
ATL Atlanta	18,284	86.7%	-0.4 min	0.1%
MSP Minneapolis	5,647	85.1%	0.4 min	0.3%
DTW Detroit	4,737	85.6%	-0.8 min	0.2%
SLC Salt Lake City	4,311	85.6%	1.0 min	0.3%
LAX Los Angeles	3,132	86.8%	-1.8 min	0.2%
SEA Seattle	2,879	84.8%	1.8 min	0.7%
JFK New York	2,454	74.8%	8.1 min	2.8%
BOS Boston	2,246	76.3%	9.0 min	1.0%
LGA New York	2,140	70.9%	14.9 min	2.9%
MCO Orlando	1,565	80.3%	7.6 min	0.8%
LAS Las Vegas	1,299	85.5%	0.5 min	0.4%
SFO San Francisco	1,129	87.5%	-3.1 min	0.6%
DEN Denver	1,023	87.5%	-2.6 min	1.0%
AUS Austin	1,010	82.3%	8.6 min	1.4%
TPA Tampa	986	84.6%	2.4 min	0.6%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of DL flights that arrived on time, by scheduled departure hour (local time at each origin), September 2023.

Delay causes

BTS cause category	Share of delay minutes	All carriers, Sep 2023	Minutes
Air carrier	48.8%	36.4%	409,610
Late-arriving aircraft	27.3%	38.3%	229,581
National Aviation System	19.6%	19.9%	164,172
Extreme weather	4.2%	5.1%	35,503
Security	0.1%	0.2%	738

839,604 delay minutes on 11,195 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

What share of Delta Air Lines flights were on time in September 2023?

85.6% of 81,701 scheduled domestic flights arrived less than 15 minutes late; all reporting carriers together recorded 80.1% that month.

How does that compare with a year earlier?

September 2022 is outside the 36 months on file, or the carrier did not report that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2023; public domain. Domestic scheduled flights, totals and averages only. The site's data runs through July 2026. Full record for Delta Air Lines · methodology · corrections.