James M Cox/Dayton International in October 2025

86.8%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 October 2025, reporting carriers scheduled 734 domestic departures from James M Cox/Dayton International (DAY). 86.8% left less than 15 minutes late and 85.6% reached their destination on time; 0.3% were cancelled.

Nationally that month, 80.0% of flights departed on time and 79.1% arrived on time, so DAY departures were 6.8 points above the national departure figure.

A year earlier, in October 2024, the airport had 682 departures with 91.9% leaving on time: a change of −5.1 points, with flights up 8%.

Flights arriving at DAY that month were on time 79.8% of the time (733 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 41%, air carrier 36% and national aviation system 21%.

On time 85.6%
Arrived 15+ minutes late 13.8%
Cancelled 0.3%
Diverted 0.4%

Every scheduled departure from DAY in October 2025, judged by arrival at the destination.

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

Measure	Oct 2025	Oct 2024	DAY, 12 months to Jul 2026	All reported flights, Oct 2025
Departed on time	86.8%	91.9%	78.8%	80.0%
Arrived on time	85.6%	90.6%	77.4%	79.1%
Cancelled	0.3%	0.7%	2.7%	0.5%
Average departure delay (late minutes only)	9.9 min	8.1 min	20.9 min	13.9 min
Scheduled departures a day	25	23	22	20,195
Scheduled departures	734	682	7,918	605,844

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OH PSA Airlines	430	59%	83.5%	0.5 min	0.5%
DL Delta Air Lines	146	20%	92.5%	-10.9 min	0.0%
UA United Airlines	62	8%	95.2%	-9.8 min	0.0%
MQ Envoy Air	56	8%	87.5%	-4.3 min	0.0%
G4 Allegiant Air	27	4%	63.0%	26.7 min	0.0%
OO SkyWest Airlines	12	2%	66.7%	6.2 min	0.0%
YX Republic Airline	1	0%	100.0%	0.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DAY–ORD	Dayton to Chicago	166	88.6%	-2.2 min	0.0%
DAY–ATL	Dayton to Atlanta	146	92.5%	-10.9 min	0.0%
DAY–CLT	Dayton to Charlotte	123	91.1%	-4.2 min	0.0%
DAY–DFW	Dayton to Dallas/Fort Worth	119	79.8%	-0.3 min	1.7%
DAY–DCA	Dayton to Washington	92	70.7%	9.7 min	0.0%
DAY–DEN	Dayton to Denver	31	96.8%	-15.7 min	0.0%
DAY–PHL	Dayton to Philadelphia	30	90.0%	-1.7 min	0.0%
DAY–PGD	Dayton to Punta Gorda	9	88.9%	-2.9 min	0.0%
DAY–PIE	Dayton to St. Petersburg	9	88.9%	-9.1 min	0.0%
DAY–SFB	Dayton to Sanford	9	11.1%	92.1 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), October 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Oct 2025	Minutes
Air carrier	35.9%	34.0%	2,639
Late-arriving aircraft	40.6%	39.7%	2,984
National Aviation System	21.4%	22.9%	1,568
Extreme weather	2.1%	3.3%	152
Security	0.0%	0.1%	0

7,343 delay minutes on 101 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 October 2025?

86.8% of 734 scheduled domestic departures left less than 15 minutes late, and 85.6% reached their destination on time. The national figures that month were 80.0% and 79.1%.

How does that compare with a year earlier?

In October 2024, 91.9% of 682 departures left on time and 0.7% were cancelled, against 86.8% and 0.3% in October 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for October 2025; 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.