Raleigh-Durham International in August 2025

77.5%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 August 2025, reporting carriers scheduled 4,640 domestic departures from Raleigh-Durham International (RDU). 77.5% left less than 15 minutes late and 77.5% reached their destination on time; 1.3% were cancelled.

Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so RDU departures were 0.7 points above the national departure figure.

A year earlier, in August 2024, the airport had 5,535 departures with 72.1% leaving on time: a change of +5.4 points, with flights down 16%.

Flights arriving at RDU that month were on time 75.3% of the time (4,634 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 45%, air carrier 28% and national aviation system 24%.

On time 77.5%
Arrived 15+ minutes late 20.9%
Cancelled 1.3%
Diverted 0.3%

Every scheduled departure from RDU in August 2025, judged by arrival at the destination.

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

Measure	Aug 2025	Aug 2024	RDU, 12 months to Jul 2026	All reported flights, Aug 2025
Departed on time	77.5%	72.1%	77.5%	76.8%
Arrived on time	77.5%	71.2%	77.1%	76.3%
Cancelled	1.3%	3.3%	2.3%	1.1%
Average departure delay (late minutes only)	18.4 min	25.8 min	17.6 min	17.6 min
Scheduled departures a day	155	185	152	20,079
Scheduled departures	4,640	5,535	55,461	602,378

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	1,044	23%	84.3%	0.4 min	1.2%
AA American Airlines	895	19%	72.8%	21.0 min	1.8%
WN Southwest Airlines	716	15%	81.8%	3.5 min	1.0%
YX Republic Airline	638	14%	75.2%	7.3 min	1.6%
UA United Airlines	519	11%	77.8%	10.0 min	0.2%
F9 Frontier Airlines	355	8%	71.0%	15.0 min	2.3%
B6 JetBlue Airways	222	5%	79.7%	6.3 min	0.0%
OH PSA Airlines	99	2%	62.6%	16.8 min	4.0%
NK Spirit Airlines	84	2%	72.6%	12.5 min	0.0%
AS Alaska Airlines	57	1%	61.4%	9.9 min	5.3%
MQ Envoy Air	11	0%	45.5%	39.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
RDU–ATL	Raleigh/Durham to Atlanta	402	87.8%	0.6 min	0.7%
RDU–ORD	Raleigh/Durham to Chicago	273	72.5%	15.5 min	2.9%
RDU–CLT	Raleigh/Durham to Charlotte	264	82.6%	11.5 min	1.1%
RDU–LGA	Raleigh/Durham to New York	245	74.3%	10.2 min	2.4%
RDU–BOS	Raleigh/Durham to Boston	230	84.8%	-4.7 min	0.9%
RDU–MCO	Raleigh/Durham to Orlando	212	70.8%	13.9 min	1.4%
RDU–JFK	Raleigh/Durham to New York	201	77.1%	5.0 min	0.5%
RDU–PHL	Raleigh/Durham to Philadelphia	201	60.7%	30.0 min	2.0%
RDU–MIA	Raleigh/Durham to Miami	196	68.9%	26.6 min	0.5%
RDU–DFW	Raleigh/Durham to Dallas/Fort Worth	190	62.6%	25.6 min	4.2%
RDU–DCA	Raleigh/Durham to Washington	163	61.3%	26.8 min	3.1%
RDU–DEN	Raleigh/Durham to Denver	163	69.3%	12.4 min	1.2%

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), August 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2025	Minutes
Air carrier	28.3%	33.1%	22,506
Late-arriving aircraft	44.9%	40.5%	35,735
National Aviation System	24.2%	19.2%	19,272
Extreme weather	2.5%	7.0%	2,008
Security	0.0%	0.1%	0

79,521 delay minutes on 972 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 RDU on time in August 2025?

77.5% of 4,640 scheduled domestic departures left less than 15 minutes late, and 77.5% reached their destination on time. The national figures that month were 76.8% and 76.3%.

How does that compare with a year earlier?

In August 2024, 72.1% of 5,535 departures left on time and 3.3% were cancelled, against 77.5% and 1.3% in August 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for RDU · methodology · corrections.