James M Cox/Dayton International in June 2025

72.0%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 June 2025, reporting carriers scheduled 682 domestic departures from James M Cox/Dayton International (DAY). 72.0% left less than 15 minutes late and 70.2% reached their destination on time; 3.7% were cancelled.

Nationally that month, 71.4% of flights departed on time and 70.3% arrived on time, so DAY departures were 0.6 points above the national departure figure.

A year earlier, in June 2024, the airport had 629 departures with 81.6% leaving on time: a change of −9.6 points, with flights up 8%.

Flights arriving at DAY that month were on time 61.3% of the time (682 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 39%, air carrier 34% and national aviation system 18%.

On time 70.2%
Arrived 15+ minutes late 26.1%
Cancelled 3.7%
Diverted 0.0%

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

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

Measure	Jun 2025	Jun 2024	DAY, 12 months to Jul 2026	All reported flights, Jun 2025
Departed on time	72.0%	81.6%	78.8%	71.4%
Arrived on time	70.2%	83.8%	77.4%	70.3%
Cancelled	3.7%	1.4%	2.7%	1.6%
Average departure delay (late minutes only)	24.5 min	17.4 min	20.9 min	22.1 min
Scheduled departures a day	23	21	22	20,386
Scheduled departures	682	629	7,918	611,575

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OH PSA Airlines	383	56%	65.5%	21.6 min	5.5%
OO SkyWest Airlines	134	20%	82.1%	3.6 min	0.0%
DL Delta Air Lines	112	16%	78.6%	8.0 min	3.6%
G4 Allegiant Air	26	4%	50.0%	32.1 min	0.0%
YX Republic Airline	23	3%	60.9%	24.7 min	0.0%
UA United Airlines	4	1%	75.0%	8.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DAY–ORD	Dayton to Chicago	185	70.8%	12.8 min	1.1%
DAY–DFW	Dayton to Dallas/Fort Worth	120	64.2%	22.3 min	1.7%
DAY–ATL	Dayton to Atlanta	112	78.6%	8.0 min	3.6%
DAY–CLT	Dayton to Charlotte	93	74.2%	28.9 min	4.3%
DAY–DCA	Dayton to Washington	90	64.4%	12.5 min	14.4%
DAY–DEN	Dayton to Denver	30	90.0%	-7.3 min	0.0%
DAY–LGA	Dayton to New York	21	57.1%	28.9 min	0.0%
DAY–PIE	Dayton to St. Petersburg	9	11.1%	74.4 min	0.0%
DAY–SFB	Dayton to Sanford	9	44.4%	23.8 min	0.0%
DAY–PGD	Dayton to Punta Gorda	8	100.0%	-6.2 min	0.0%
DAY–PHL	Dayton to Philadelphia	5	80.0%	-1.6 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), June 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2025	Minutes
Air carrier	34.4%	31.6%	5,765
Late-arriving aircraft	38.9%	40.6%	6,524
National Aviation System	18.4%	20.9%	3,088
Extreme weather	8.3%	6.9%	1,384
Security	0.0%	0.2%	0

16,761 delay minutes on 178 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 June 2025?

72.0% of 682 scheduled domestic departures left less than 15 minutes late, and 70.2% reached their destination on time. The national figures that month were 71.4% and 70.3%.

How does that compare with a year earlier?

In June 2024, 81.6% of 629 departures left on time and 1.4% were cancelled, against 72.0% and 3.7% in June 2025.

Provenance

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