Hartsfield-Jackson Atlanta International in June 2026

78.3%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 June 2026, reporting carriers scheduled 26,961 domestic departures from Hartsfield-Jackson Atlanta International (ATL). 78.3% left less than 15 minutes late and 78.7% reached their destination on time; 1.4% were cancelled.

Nationally that month, 72.2% of flights departed on time and 72.8% arrived on time, so ATL departures were 6.1 points above the national departure figure.

A year earlier, in June 2025, the airport had 27,728 departures with 63.3% leaving on time: a change of +15.0 points, with flights down 3%.

Flights arriving at ATL that month were on time 81.9% of the time (26,959 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 37%, late-arriving aircraft 32% and national aviation system 26%.

On time 78.7%
Arrived 15+ minutes late 19.6%
Cancelled 1.4%
Diverted 0.3%

Every scheduled departure from ATL in June 2026, judged by arrival at the destination.

June 2026 against a year earlier, the airport's year and the nation

Measure	Jun 2026	Jun 2025	ATL, 12 months to Jul 2026	All reported flights, Jun 2026
Departed on time	78.3%	63.3%	77.1%	72.2%
Arrived on time	78.7%	62.5%	76.6%	72.8%
Cancelled	1.4%	2.5%	1.8%	1.6%
Average departure delay (late minutes only)	14.8 min	26.6 min	15.1 min	20.6 min
Scheduled departures a day	899	924	865	20,253
Scheduled departures	26,961	27,728	315,859	607,577

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	20,812	77%	81.9%	2.8 min	1.1%
F9 Frontier Airlines	2,035	8%	61.0%	25.5 min	3.0%
WN Southwest Airlines	1,309	5%	67.2%	16.5 min	0.5%
UA United Airlines	690	3%	74.6%	17.7 min	1.4%
AA American Airlines	616	2%	69.6%	14.0 min	3.1%
OO SkyWest Airlines	490	2%	75.5%	10.9 min	1.4%
B6 JetBlue Airways	282	1%	71.6%	13.9 min	0.7%
OH PSA Airlines	282	1%	74.1%	12.3 min	6.7%
YX Republic Airline	269	1%	73.6%	11.5 min	6.3%
AS Alaska Airlines	120	0%	80.8%	2.5 min	0.8%
MQ Envoy Air	56	0%	76.8%	1.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ATL–MCO	Atlanta to Orlando	666	72.1%	22.2 min	1.4%
ATL–LGA	Atlanta to New York	665	67.8%	15.6 min	4.5%
ATL–ORD	Atlanta to Chicago	584	66.1%	24.6 min	3.3%
ATL–DCA	Atlanta to Washington	562	68.3%	18.0 min	4.3%
ATL–PHL	Atlanta to Philadelphia	544	76.1%	8.5 min	2.0%
ATL–DFW	Atlanta to Dallas/Fort Worth	541	64.1%	18.2 min	4.1%
ATL–FLL	Atlanta to Fort Lauderdale	540	77.2%	6.4 min	1.7%
ATL–TPA	Atlanta to Tampa	533	78.8%	6.4 min	0.9%
ATL–DEN	Atlanta to Denver	515	76.5%	7.1 min	0.4%
ATL–EWR	Atlanta to Newark	507	71.4%	20.2 min	3.0%
ATL–MIA	Atlanta to Miami	490	76.1%	8.5 min	1.2%
ATL–BWI	Atlanta to Baltimore	480	72.5%	11.2 min	1.5%

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), June 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2026	Minutes
Air carrier	36.9%	30.8%	136,896
Late-arriving aircraft	32.2%	42.1%	119,314
National Aviation System	25.6%	20.3%	94,974
Extreme weather	5.2%	6.7%	19,416
Security	0.1%	0.1%	290

370,890 delay minutes on 5,275 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 June 2026?

78.3% of 26,961 scheduled domestic departures left less than 15 minutes late, and 78.7% reached their destination on time. The national figures that month were 72.2% and 72.8%.

How does that compare with a year earlier?

In June 2025, 63.3% of 27,728 departures left on time and 2.5% were cancelled, against 78.3% and 1.4% in June 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for June 2026; 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.