Delta Air Lines in September 2024

86.6%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 2024, Delta Air Lines (DL) reported 84,545 scheduled domestic flights. 86.6% arrived on time, 0.4% were cancelled and 0.2% diverted.

All reporting carriers together recorded 83.9% on time and 0.6% cancelled that month, so the carrier was 2.7 points above the combined figure.

A year earlier, in September 2023, it reported 81,701 flights with 85.6% on time: a change of +1.0 points.

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 50%, late-arriving aircraft 28% and national aviation system 16%.

On time 86.6%
Arrived 15+ minutes late 12.8%
Cancelled 0.4%
Diverted 0.2%

Every scheduled domestic flight reported by Delta Air Lines in September 2024.

September 2024 against a year earlier, the carrier's year and all carriers

Measure	Sep 2024	Sep 2023	DL, 12 months to Jul 2026	All carriers, Sep 2024
Arrived on time	86.6%	85.6%	79.9%	83.9%
Departed on time	86.8%	85.2%	80.6%	84.4%
Cancelled	0.4%	0.5%	1.7%	0.6%
Average arrival delay	-1.5 min	1.1 min	3.9 min	1.0 min
Scheduled flights a day	2,818	2,723	2,846	19,421
Scheduled flights	84,545	81,701	1,038,644	582,622

143 airports and 912 routes had DL flights that month.

Busiest airports that month

Airport	Departures	On time	Avg arrival delay	Cancelled
ATL Atlanta	19,151	83.9%	1.8 min	0.5%
MSP Minneapolis	5,936	91.2%	-7.1 min	0.2%
DTW Detroit	4,760	87.9%	-3.4 min	0.2%
SLC Salt Lake City	4,506	84.9%	1.7 min	0.1%
LAX Los Angeles	3,065	88.6%	-4.7 min	0.2%
SEA Seattle	2,762	85.7%	-0.8 min	0.1%
JFK New York	2,541	84.4%	-3.9 min	0.3%
LGA New York	2,356	86.7%	-4.0 min	0.4%
BOS Boston	2,208	83.3%	0.9 min	0.4%
MCO Orlando	1,597	81.8%	2.7 min	0.0%
LAS Las Vegas	1,339	82.4%	1.0 min	0.1%
SFO San Francisco	1,125	89.2%	-2.9 min	0.1%
ORD Chicago	1,045	87.4%	-3.2 min	0.1%
DFW Dallas/Fort Worth	1,043	89.6%	-6.3 min	0.0%
DEN Denver	1,001	88.4%	-2.3 min	0.0%

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 2024.

Delay causes

BTS cause category	Share of delay minutes	All carriers, Sep 2024	Minutes
Air carrier	50.2%	38.6%	338,780
Late-arriving aircraft	28.1%	38.4%	189,944
National Aviation System	15.8%	18.2%	106,803
Extreme weather	5.8%	4.8%	38,997
Security	0.1%	0.1%	628

675,152 delay minutes on 10,847 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 2024?

86.6% of 84,545 scheduled domestic flights arrived less than 15 minutes late; all reporting carriers together recorded 83.9% that month.

How does that compare with a year earlier?

In September 2023 the carrier reported 81,701 flights with 85.6% on time and 0.5% cancelled, against 86.6% and 0.4% in September 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2024; 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.