Raleigh-Durham International in May 2025

80.0%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 4,800 domestic departures from Raleigh-Durham International (RDU). 80.0% left less than 15 minutes late and 77.2% reached their destination on time; 1.2% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so RDU departures were 3.3 points above the national departure figure.

A year earlier, in May 2024, the airport had 5,489 departures with 75.5% leaving on time: a change of +4.5 points, with flights down 13%.

Flights arriving at RDU that month were on time 74.9% of the time (4,801 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 42%, late-arriving aircraft 40% and air carrier 15%.

On time 77.2%
Arrived 15+ minutes late 21.4%
Cancelled 1.2%
Diverted 0.2%

Every scheduled departure from RDU 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	RDU, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	80.0%	75.5%	77.5%	76.7%
Arrived on time	77.2%	72.0%	77.1%	75.4%
Cancelled	1.2%	1.1%	2.3%	1.0%
Average departure delay (late minutes only)	15.5 min	20.5 min	17.6 min	17.5 min
Scheduled departures a day	160	183	152	20,188
Scheduled departures	4,800	5,489	55,461	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	1,011	21%	80.8%	4.0 min	0.2%
AA American Airlines	972	20%	76.1%	4.3 min	2.0%
WN Southwest Airlines	771	16%	80.8%	2.6 min	0.5%
YX Republic Airline	626	13%	72.8%	16.0 min	2.2%
UA United Airlines	523	11%	74.6%	15.0 min	1.9%
F9 Frontier Airlines	346	7%	72.3%	21.3 min	0.3%
B6 JetBlue Airways	248	5%	83.5%	-1.6 min	0.0%
MQ Envoy Air	113	2%	82.3%	8.6 min	0.9%
AS Alaska Airlines	62	1%	79.0%	-2.8 min	0.0%
OH PSA Airlines	56	1%	58.9%	23.4 min	8.9%
NK Spirit Airlines	53	1%	62.3%	45.2 min	5.7%
OO SkyWest Airlines	19	0%	73.7%	25.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
RDU–ATL	Raleigh/Durham to Atlanta	381	78.5%	5.2 min	0.3%
RDU–ORD	Raleigh/Durham to Chicago	297	83.5%	5.2 min	0.7%
RDU–CLT	Raleigh/Durham to Charlotte	296	81.1%	0.5 min	2.4%
RDU–BOS	Raleigh/Durham to Boston	257	75.5%	6.0 min	0.4%
RDU–MCO	Raleigh/Durham to Orlando	232	76.3%	8.7 min	0.0%
RDU–PHL	Raleigh/Durham to Philadelphia	232	65.1%	27.3 min	1.7%
RDU–MIA	Raleigh/Durham to Miami	227	79.3%	4.9 min	0.9%
RDU–LGA	Raleigh/Durham to New York	221	68.8%	28.5 min	2.3%
RDU–DFW	Raleigh/Durham to Dallas/Fort Worth	205	71.2%	7.3 min	2.9%
RDU–JFK	Raleigh/Durham to New York	190	75.3%	10.7 min	0.0%
RDU–BNA	Raleigh/Durham to Nashville	172	82.6%	4.2 min	1.7%
RDU–DCA	Raleigh/Durham to Washington	171	70.8%	14.3 min	3.5%

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), May 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	14.8%	29.3%	11,202
Late-arriving aircraft	39.5%	37.8%	29,911
National Aviation System	41.8%	25.9%	31,604
Extreme weather	3.9%	6.9%	2,947
Security	0.0%	0.1%	0

75,664 delay minutes on 1,026 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 May 2025?

80.0% of 4,800 scheduled domestic departures left less than 15 minutes late, and 77.2% 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, 75.5% of 5,489 departures left on time and 1.1% were cancelled, against 80.0% and 1.2% 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 RDU · methodology · corrections.