Raleigh-Durham International in September 2025

85.1%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 September 2025, reporting carriers scheduled 4,484 domestic departures from Raleigh-Durham International (RDU). 85.1% left less than 15 minutes late and 84.1% reached their destination on time; 0.5% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so RDU departures were 2.0 points above the national departure figure.

A year earlier, in September 2024, the airport had 5,104 departures with 84.2% leaving on time: a change of +0.9 points, with flights down 12%.

Flights arriving at RDU that month were on time 83.2% of the time (4,485 scheduled arrivals).

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

On time 84.1%
Arrived 15+ minutes late 15.3%
Cancelled 0.5%
Diverted 0.1%

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

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

Measure	Sep 2025	Sep 2024	RDU, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	85.1%	84.2%	77.5%	83.1%
Arrived on time	84.1%	82.1%	77.1%	82.8%
Cancelled	0.5%	1.0%	2.3%	0.5%
Average departure delay (late minutes only)	13.0 min	13.2 min	17.6 min	12.2 min
Scheduled departures a day	150	170	152	18,748
Scheduled departures	4,484	5,104	55,461	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	1,005	22%	89.9%	-3.7 min	0.3%
AA American Airlines	849	19%	82.6%	9.8 min	0.7%
WN Southwest Airlines	688	15%	88.4%	-0.7 min	0.0%
YX Republic Airline	629	14%	80.8%	7.7 min	0.8%
UA United Airlines	535	12%	87.5%	-0.9 min	0.4%
F9 Frontier Airlines	334	7%	79.3%	-2.8 min	0.9%
B6 JetBlue Airways	208	5%	70.7%	6.1 min	1.0%
OH PSA Airlines	116	3%	64.7%	25.6 min	0.9%
NK Spirit Airlines	52	1%	73.1%	5.9 min	1.9%
AS Alaska Airlines	47	1%	87.2%	-9.4 min	0.0%
MQ Envoy Air	21	0%	76.2%	6.6 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
RDU–ATL	Raleigh/Durham to Atlanta	401	95.5%	-6.9 min	0.0%
RDU–ORD	Raleigh/Durham to Chicago	266	82.7%	8.6 min	0.0%
RDU–BOS	Raleigh/Durham to Boston	256	65.6%	17.2 min	1.2%
RDU–LGA	Raleigh/Durham to New York	255	76.5%	10.9 min	1.6%
RDU–CLT	Raleigh/Durham to Charlotte	245	85.7%	2.8 min	0.0%
RDU–PHL	Raleigh/Durham to Philadelphia	207	77.8%	13.2 min	0.5%
RDU–MCO	Raleigh/Durham to Orlando	204	87.7%	-3.6 min	0.5%
RDU–JFK	Raleigh/Durham to New York	197	80.7%	7.2 min	1.0%
RDU–BNA	Raleigh/Durham to Nashville	183	86.9%	1.5 min	0.0%
RDU–MIA	Raleigh/Durham to Miami	180	82.2%	8.0 min	0.0%
RDU–DFW	Raleigh/Durham to Dallas/Fort Worth	179	78.8%	14.2 min	2.8%
RDU–DCA	Raleigh/Durham to Washington	172	66.3%	21.2 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), September 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	31.7%	34.3%	17,462
Late-arriving aircraft	37.4%	37.4%	20,638
National Aviation System	26.0%	22.6%	14,311
Extreme weather	4.9%	5.6%	2,707
Security	0.0%	0.1%	0

55,118 delay minutes on 685 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 September 2025?

85.1% of 4,484 scheduled domestic departures left less than 15 minutes late, and 84.1% reached their destination on time. The national figures that month were 83.1% and 82.8%.

How does that compare with a year earlier?

In September 2024, 84.2% of 5,104 departures left on time and 1.0% were cancelled, against 85.1% and 0.5% in September 2025.

Provenance

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