Wilmington International in December 2025

74.3%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 December 2025, reporting carriers scheduled 544 domestic departures from Wilmington International (ILM). 74.3% left less than 15 minutes late and 75.2% reached their destination on time; 2.2% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so ILM departures were 2.3 points above the national departure figure.

A year earlier, in December 2024, the airport had 709 departures with 78.4% leaving on time: a change of −4.1 points, with flights down 23%.

Flights arriving at ILM that month were on time 64.5% of the time (543 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 42%, air carrier 42% and national aviation system 13%.

On time 75.2%
Arrived 15+ minutes late 22.4%
Cancelled 2.2%
Diverted 0.2%

Every scheduled departure from ILM in December 2025, judged by arrival at the destination.

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

Measure	Dec 2025	Dec 2024	ILM, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	74.3%	78.4%	78.3%	72.0%
Arrived on time	75.2%	77.9%	78.2%	71.9%
Cancelled	2.2%	0.3%	3.2%	1.5%
Average departure delay (late minutes only)	22.6 min	16.8 min	16.8 min	21.2 min
Scheduled departures a day	18	24	21	19,410
Scheduled departures	544	709	7,522	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	205	38%	82.4%	9.5 min	0.5%
YX Republic Airline	144	26%	63.9%	12.3 min	5.6%
DL Delta Air Lines	95	17%	83.2%	0.0 min	0.0%
OH PSA Airlines	85	16%	63.5%	25.2 min	3.5%
MQ Envoy Air	15	3%	100.0%	-18.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ILM–CLT	Wilmington to Charlotte	138	85.5%	17.2 min	0.7%
ILM–ATL	Wilmington to Atlanta	95	83.2%	0.0 min	0.0%
ILM–LGA	Wilmington to New York	84	61.9%	16.4 min	6.0%
ILM–DCA	Wilmington to Washington	60	60.0%	24.2 min	5.0%
ILM–DFW	Wilmington to Dallas/Fort Worth	60	70.0%	4.5 min	0.0%
ILM–EWR	Wilmington to Newark	58	69.0%	5.5 min	5.2%
ILM–MIA	Wilmington to Miami	48	87.5%	-6.4 min	0.0%
ILM–PHL	Wilmington to Philadelphia	1	0.0%	106.0 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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	42.1%	33.3%	4,609
Late-arriving aircraft	42.3%	41.1%	4,631
National Aviation System	13.0%	19.1%	1,422
Extreme weather	2.6%	6.4%	286
Security	0.0%	0.2%	0

10,948 delay minutes on 122 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 December 2025?

74.3% of 544 scheduled domestic departures left less than 15 minutes late, and 75.2% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 78.4% of 709 departures left on time and 0.3% were cancelled, against 74.3% and 2.2% in December 2025.

Provenance

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