Hartsfield-Jackson Atlanta International in December 2023

85.6%departed 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 December 2023, reporting carriers scheduled 28,027 domestic departures from Hartsfield-Jackson Atlanta International (ATL). 85.6% left less than 15 minutes late and 87.0% reached their destination on time; 0.1% were cancelled.

Nationally that month, 83.1% of flights departed on time and 83.8% arrived on time, so ATL departures were 2.5 points above the national departure figure.

Flights arriving at ATL that month were on time 87.8% of the time (28,052 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 49%, late-arriving aircraft 26% and national aviation system 20%.

On time 87.0%
Arrived 15+ minutes late 12.8%
Cancelled 0.1%
Diverted 0.2%

Every scheduled departure from ATL in December 2023, judged by arrival at the destination.

December 2023 against a year earlier, the airport's year and the nation

Measure	Dec 2023	Year earlier	ATL, 12 months to Jul 2026	All reported flights, Dec 2023
Departed on time	85.6%	—	77.1%	83.1%
Arrived on time	87.0%	—	76.6%	83.8%
Cancelled	0.1%	—	1.8%	0.4%
Average departure delay (late minutes only)	8.5 min	—	15.1 min	11.6 min
Scheduled departures a day	934	—	865	19,013
Scheduled departures	28,027	—	315,859	570,394

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	17,815	64%	89.9%	-4.6 min	0.0%
WN Southwest Airlines	3,614	13%	79.9%	3.7 min	0.3%
9E Endeavor Air	2,111	8%	88.7%	-1.8 min	0.0%
NK Spirit Airlines	1,057	4%	73.8%	8.7 min	0.1%
F9 Frontier Airlines	867	3%	72.3%	12.9 min	0.6%
OO SkyWest Airlines	681	2%	89.6%	1.1 min	0.1%
AA American Airlines	620	2%	84.0%	2.9 min	0.0%
UA United Airlines	513	2%	89.3%	-3.3 min	0.0%
B6 JetBlue Airways	312	1%	68.6%	15.9 min	0.0%
YX Republic Airline	153	1%	86.9%	-5.1 min	0.7%
OH PSA Airlines	151	1%	91.4%	-9.6 min	0.0%
AS Alaska Airlines	88	0%	90.9%	-8.8 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ATL–MCO	Atlanta to Orlando	820	78.2%	7.4 min	0.2%
ATL–FLL	Atlanta to Fort Lauderdale	731	72.8%	12.1 min	0.0%
ATL–MIA	Atlanta to Miami	656	72.0%	10.0 min	0.2%
ATL–LGA	Atlanta to New York	654	85.9%	-2.3 min	0.2%
ATL–TPA	Atlanta to Tampa	605	79.8%	7.2 min	0.2%
ATL–DCA	Atlanta to Washington	553	85.2%	-2.4 min	0.4%
ATL–DEN	Atlanta to Denver	535	88.0%	-6.1 min	0.0%
ATL–DFW	Atlanta to Dallas/Fort Worth	521	85.2%	-0.8 min	0.0%
ATL–BWI	Atlanta to Baltimore	517	82.8%	2.3 min	0.4%
ATL–PHL	Atlanta to Philadelphia	467	86.3%	-0.8 min	0.0%
ATL–LAX	Atlanta to Los Angeles	462	89.2%	-10.4 min	0.0%
ATL–EWR	Atlanta to Newark	459	91.3%	-6.2 min	0.0%

By scheduled departure hour

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

Share of departures that left less than 15 minutes late, by scheduled hour (local time), December 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2023	Minutes
Air carrier	49.1%	37.1%	93,566
Late-arriving aircraft	26.4%	38.8%	50,238
National Aviation System	20.4%	17.6%	38,842
Extreme weather	3.9%	6.2%	7,450
Security	0.2%	0.3%	288

190,384 delay minutes on 3,574 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

How many flights left ATL on time in December 2023?

85.6% of 28,027 scheduled domestic departures left less than 15 minutes late, and 87.0% reached their destination on time. The national figures that month were 83.1% and 83.8%.

How does that compare with a year earlier?

December 2022 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

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