Hartsfield-Jackson Atlanta International in May 2025

72.5%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 May 2025, reporting carriers scheduled 27,275 domestic departures from Hartsfield-Jackson Atlanta International (ATL). 72.5% left less than 15 minutes late and 70.4% reached their destination on time; 0.3% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so ATL departures were 4.2 points below the national departure figure.

A year earlier, in May 2024, the airport had 29,870 departures with 74.2% leaving on time: a change of −1.7 points, with flights down 9%.

Flights arriving at ATL that month were on time 76.8% of the time (27,284 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 41%, late-arriving aircraft 27% and national aviation system 27%.

On time 70.4%
Arrived 15+ minutes late 29.0%
Cancelled 0.3%
Diverted 0.3%

Every scheduled departure from ATL in May 2025, judged by arrival at the destination.

May 2025 against a year earlier, the airport's year and the nation

Measure	May 2025	May 2024	ATL, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	72.5%	74.2%	77.1%	76.7%
Arrived on time	70.4%	71.7%	76.6%	75.4%
Cancelled	0.3%	0.6%	1.8%	1.0%
Average departure delay (late minutes only)	19.0 min	18.0 min	15.1 min	17.5 min
Scheduled departures a day	909	996	865	20,188
Scheduled departures	27,275	29,870	315,859	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	20,715	76%	71.6%	12.9 min	0.1%
WN Southwest Airlines	1,617	6%	71.5%	13.1 min	0.2%
F9 Frontier Airlines	1,272	5%	55.7%	42.0 min	1.6%
NK Spirit Airlines	826	3%	62.6%	21.0 min	0.6%
OO SkyWest Airlines	791	3%	68.3%	23.2 min	0.8%
AA American Airlines	602	2%	74.8%	18.6 min	1.8%
UA United Airlines	596	2%	67.6%	26.1 min	1.3%
OH PSA Airlines	293	1%	61.4%	36.7 min	4.1%
B6 JetBlue Airways	213	1%	72.3%	12.2 min	0.5%
AS Alaska Airlines	140	1%	63.6%	12.7 min	0.0%
YX Republic Airline	107	0%	68.2%	11.9 min	1.9%
MQ Envoy Air	103	0%	87.4%	-5.8 min	1.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ATL–MCO	Atlanta to Orlando	716	62.4%	25.0 min	0.0%
ATL–LGA	Atlanta to New York	605	63.3%	21.7 min	0.3%
ATL–DCA	Atlanta to Washington	592	63.9%	18.8 min	1.2%
ATL–DFW	Atlanta to Dallas/Fort Worth	567	60.7%	30.1 min	1.8%
ATL–ORD	Atlanta to Chicago	557	76.5%	10.6 min	0.5%
ATL–TPA	Atlanta to Tampa	551	71.0%	14.2 min	0.7%
ATL–MIA	Atlanta to Miami	537	73.9%	13.1 min	0.0%
ATL–FLL	Atlanta to Fort Lauderdale	531	69.5%	18.2 min	0.0%
ATL–BWI	Atlanta to Baltimore	500	68.6%	17.4 min	0.6%
ATL–PHL	Atlanta to Philadelphia	487	63.9%	32.1 min	1.4%
ATL–LAX	Atlanta to Los Angeles	484	68.4%	13.1 min	0.8%
ATL–DEN	Atlanta to Denver	482	61.8%	23.6 min	0.2%

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), May 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	40.5%	29.3%	209,969
Late-arriving aircraft	27.3%	37.8%	141,683
National Aviation System	26.7%	25.9%	138,265
Extreme weather	5.4%	6.9%	27,723
Security	0.1%	0.1%	507

518,147 delay minutes on 7,898 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 May 2025?

72.5% of 27,275 scheduled domestic departures left less than 15 minutes late, and 70.4% reached their destination on time. The national figures that month were 76.7% and 75.4%.

How does that compare with a year earlier?

In May 2024, 74.2% of 29,870 departures left on time and 0.6% were cancelled, against 72.5% and 0.3% in May 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2025; 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.