Wilmington International in September 2025

85.4%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 698 domestic departures from Wilmington International (ILM). 85.4% left less than 15 minutes late and 86.1% reached their destination on time; 1.1% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so ILM departures were 2.3 points above the national departure figure.

A year earlier, in September 2024, the airport had 715 departures with 84.9% leaving on time: a change of +0.5 points, with flights down 2%.

Flights arriving at ILM that month were on time 83.6% of the time (697 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 41%, national aviation system 35% and air carrier 17%.

On time 86.1%
Arrived 15+ minutes late 12.8%
Cancelled 1.1%
Diverted 0.0%

Every scheduled departure from ILM 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	ILM, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	85.4%	84.9%	78.3%	83.1%
Arrived on time	86.1%	85.3%	78.2%	82.8%
Cancelled	1.1%	1.4%	3.2%	0.5%
Average departure delay (late minutes only)	10.7 min	10.0 min	16.8 min	12.2 min
Scheduled departures a day	23	24	21	18,748
Scheduled departures	698	715	7,522	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	213	31%	84.5%	-0.7 min	1.4%
OH PSA Airlines	155	22%	85.8%	-4.2 min	1.3%
DL Delta Air Lines	117	17%	95.7%	-10.2 min	0.0%
MQ Envoy Air	96	14%	80.2%	3.9 min	1.0%
YX Republic Airline	87	12%	90.8%	-0.3 min	2.3%
B6 JetBlue Airways	30	4%	66.7%	9.6 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ILM–CLT	Wilmington to Charlotte	220	88.6%	-4.1 min	0.5%
ILM–ATL	Wilmington to Atlanta	114	96.5%	-10.7 min	0.0%
ILM–DCA	Wilmington to Washington	90	81.1%	1.3 min	2.2%
ILM–LGA	Wilmington to New York	78	91.0%	-0.8 min	2.6%
ILM–BOS	Wilmington to Boston	69	63.8%	16.5 min	1.4%
ILM–DFW	Wilmington to Dallas/Fort Worth	60	78.3%	0.7 min	3.3%
ILM–ORD	Wilmington to Chicago	31	90.3%	-13.8 min	0.0%
ILM–MIA	Wilmington to Miami	30	93.3%	-0.7 min	0.0%
ILM–MSP	Wilmington to Minneapolis	3	66.7%	8.3 min	0.0%
ILM–PHL	Wilmington to Philadelphia	3	100.0%	-20.3 min	0.0%

By scheduled departure hour

100

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	16.6%	34.3%	1,106
Late-arriving aircraft	40.6%	37.4%	2,706
National Aviation System	34.7%	22.6%	2,313
Extreme weather	8.2%	5.6%	548
Security	0.0%	0.1%	0

6,673 delay minutes on 89 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 ILM on time in September 2025?

85.4% of 698 scheduled domestic departures left less than 15 minutes late, and 86.1% 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, 84.9% of 715 departures left on time and 1.4% were cancelled, against 85.4% and 1.1% 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 ILM · methodology · corrections.