Wilmington International in May 2025

77.7%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 656 domestic departures from Wilmington International (ILM). 77.7% left less than 15 minutes late and 75.2% reached their destination on time; 3.2% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so ILM departures were 1.0 points above the national departure figure.

A year earlier, in May 2024, the airport had 684 departures with 81.4% leaving on time: a change of −3.7 points, with flights down 4%.

Flights arriving at ILM that month were on time 74.0% of the time (655 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 34%, air carrier 31% and late-arriving aircraft 28%.

On time 75.2%
Arrived 15+ minutes late 21.6%
Cancelled 3.2%
Diverted 0.0%

Every scheduled departure from ILM 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	ILM, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	77.7%	81.4%	78.3%	76.7%
Arrived on time	75.2%	77.5%	78.2%	75.4%
Cancelled	3.2%	1.2%	3.2%	1.0%
Average departure delay (late minutes only)	18.1 min	16.4 min	16.8 min	17.5 min
Scheduled departures a day	22	23	21	20,188
Scheduled departures	656	684	7,522	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	172	26%	84.3%	8.6 min	1.7%
MQ Envoy Air	151	23%	76.8%	3.3 min	2.6%
YX Republic Airline	119	18%	61.3%	30.5 min	10.1%
OH PSA Airlines	106	16%	72.6%	10.6 min	0.9%
DL Delta Air Lines	66	10%	81.8%	0.2 min	0.0%
B6 JetBlue Airways	31	5%	67.7%	5.8 min	3.2%
OO SkyWest Airlines	11	2%	63.6%	13.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ILM–CLT	Wilmington to Charlotte	239	80.8%	10.0 min	1.3%
ILM–LGA	Wilmington to New York	81	70.4%	19.8 min	4.9%
ILM–BOS	Wilmington to Boston	71	63.4%	14.5 min	2.8%
ILM–ATL	Wilmington to Atlanta	66	81.8%	0.2 min	0.0%
ILM–DCA	Wilmington to Washington	62	71.0%	14.1 min	1.6%
ILM–DFW	Wilmington to Dallas/Fort Worth	62	87.1%	-12.0 min	3.2%
ILM–MIA	Wilmington to Miami	31	90.3%	-10.6 min	3.2%
ILM–EWR	Wilmington to Newark	28	25.0%	89.8 min	28.6%
ILM–ORD	Wilmington to Chicago	10	80.0%	3.1 min	0.0%
ILM–PHL	Wilmington to Philadelphia	4	75.0%	-4.5 min	0.0%
ILM–DEN	Wilmington to Denver	2	0.0%	54.0 min	0.0%

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	30.6%	29.3%	3,699
Late-arriving aircraft	28.1%	37.8%	3,403
National Aviation System	33.5%	25.9%	4,056
Extreme weather	7.7%	6.9%	933
Security	0.0%	0.1%	0

12,091 delay minutes on 142 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 May 2025?

77.7% of 656 scheduled domestic departures left less than 15 minutes late, and 75.2% 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, 81.4% of 684 departures left on time and 1.2% were cancelled, against 77.7% and 3.2% 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 ILM · methodology · corrections.