James M Cox/Dayton International in December 2024

78.5%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 2024, reporting carriers scheduled 586 domestic departures from James M Cox/Dayton International (DAY). 78.5% left less than 15 minutes late and 77.8% reached their destination on time; 1.0% were cancelled.

Nationally that month, 77.8% of flights departed on time and 78.1% arrived on time, so DAY departures were 0.7 points above the national departure figure.

A year earlier, in December 2023, the airport had 603 departures with 91.4% leaving on time: a change of −12.9 points, with flights down 3%.

Flights arriving at DAY that month were on time 74.5% of the time (584 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 32% and national aviation system 21%.

On time 77.8%
Arrived 15+ minutes late 20.8%
Cancelled 1.0%
Diverted 0.3%

Every scheduled departure from DAY in December 2024, judged by arrival at the destination.

December 2024 against a year earlier, the airport's year and the nation

Measure	Dec 2024	Dec 2023	DAY, 12 months to Jul 2026	All reported flights, Dec 2024
Departed on time	78.5%	91.4%	78.8%	77.8%
Arrived on time	77.8%	91.9%	77.4%	78.1%
Cancelled	1.0%	0.0%	2.7%	0.7%
Average departure delay (late minutes only)	18.4 min	7.9 min	20.9 min	16.6 min
Scheduled departures a day	20	20	22	19,686
Scheduled departures	586	603	7,918	590,581

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OH PSA Airlines	291	50%	72.2%	13.2 min	1.0%
DL Delta Air Lines	73	12%	87.7%	-5.3 min	0.0%
OO SkyWest Airlines	68	12%	89.7%	-3.8 min	0.0%
9E Endeavor Air	64	11%	82.8%	12.4 min	1.6%
MQ Envoy Air	32	5%	81.3%	-8.0 min	3.1%
YX Republic Airline	31	5%	74.2%	1.9 min	0.0%
G4 Allegiant Air	27	5%	70.4%	2.2 min	3.7%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DAY–ATL	Dayton to Atlanta	119	86.6%	-0.2 min	0.8%
DAY–DFW	Dayton to Dallas/Fort Worth	119	73.9%	4.3 min	1.7%
DAY–CLT	Dayton to Charlotte	117	74.4%	10.9 min	0.0%
DAY–DCA	Dayton to Washington	87	70.1%	20.9 min	2.3%
DAY–LGA	Dayton to New York	49	75.5%	9.9 min	0.0%
DAY–ORD	Dayton to Chicago	37	91.9%	-4.2 min	0.0%
DAY–DEN	Dayton to Denver	31	87.1%	-3.4 min	0.0%
DAY–PGD	Dayton to Punta Gorda	10	60.0%	14.6 min	0.0%
DAY–PIE	Dayton to St. Petersburg	9	77.8%	-9.7 min	11.1%
DAY–SFB	Dayton to Sanford	8	75.0%	-1.4 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 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2024	Minutes
Air carrier	31.9%	34.3%	3,097
Late-arriving aircraft	43.8%	40.2%	4,252
National Aviation System	20.9%	17.8%	2,027
Extreme weather	3.3%	7.5%	324
Security	0.0%	0.2%	0

9,700 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 DAY on time in December 2024?

78.5% of 586 scheduled domestic departures left less than 15 minutes late, and 77.8% reached their destination on time. The national figures that month were 77.8% and 78.1%.

How does that compare with a year earlier?

In December 2023, 91.4% of 603 departures left on time and 0.0% were cancelled, against 78.5% and 1.0% in December 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for December 2024; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for DAY · methodology · corrections.