James M Cox/Dayton International in June 2026

76.9%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 2026, reporting carriers scheduled 628 domestic departures from James M Cox/Dayton International (DAY). 76.9% left less than 15 minutes late and 74.2% reached their destination on time; 3.8% were cancelled.

Nationally that month, 72.2% of flights departed on time and 72.8% arrived on time, so DAY departures were 4.7 points above the national departure figure.

A year earlier, in June 2025, the airport had 682 departures with 72.0% leaving on time: a change of +4.9 points, with flights down 8%.

Flights arriving at DAY that month were on time 67.7% of the time (628 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 51%, extreme weather 17% and national aviation system 17%.

On time 74.2%
Arrived 15+ minutes late 21.2%
Cancelled 3.8%
Diverted 0.8%

Every scheduled departure from DAY in June 2026, judged by arrival at the destination.

June 2026 against a year earlier, the airport's year and the nation

Measure	Jun 2026	Jun 2025	DAY, 12 months to Jul 2026	All reported flights, Jun 2026
Departed on time	76.9%	72.0%	78.8%	72.2%
Arrived on time	74.2%	70.2%	77.4%	72.8%
Cancelled	3.8%	3.7%	2.7%	1.6%
Average departure delay (late minutes only)	22.0 min	24.5 min	20.9 min	20.6 min
Scheduled departures a day	21	23	22	20,253
Scheduled departures	628	682	7,918	607,577

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OH PSA Airlines	328	52%	73.5%	8.2 min	5.2%
DL Delta Air Lines	109	17%	89.9%	-9.7 min	0.9%
OO SkyWest Airlines	75	12%	53.3%	35.6 min	2.7%
G4 Allegiant Air	34	5%	50.0%	62.2 min	0.0%
MQ Envoy Air	31	5%	93.5%	-9.8 min	0.0%
UA United Airlines	30	5%	86.7%	11.8 min	0.0%
YX Republic Airline	21	3%	71.4%	15.8 min	19.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DAY–ORD	Dayton to Chicago	127	66.1%	21.2 min	4.7%
DAY–CLT	Dayton to Charlotte	113	75.2%	18.0 min	0.0%
DAY–DFW	Dayton to Dallas/Fort Worth	112	67.0%	5.1 min	7.1%
DAY–ATL	Dayton to Atlanta	109	89.9%	-9.7 min	0.9%
DAY–DCA	Dayton to Washington	73	75.3%	1.7 min	9.6%
DAY–DEN	Dayton to Denver	30	86.7%	11.8 min	0.0%
DAY–PHL	Dayton to Philadelphia	30	86.7%	-5.4 min	6.7%
DAY–MYR	Dayton to Myrtle Beach	9	66.7%	14.6 min	0.0%
DAY–PIE	Dayton to St. Petersburg	9	55.6%	125.0 min	0.0%
DAY–PGD	Dayton to Punta Gorda	8	50.0%	40.3 min	0.0%
DAY–SFB	Dayton to Sanford	8	25.0%	67.1 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), June 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2026	Minutes
Air carrier	15.6%	30.8%	2,034
Late-arriving aircraft	51.3%	42.1%	6,694
National Aviation System	16.5%	20.3%	2,159
Extreme weather	16.6%	6.7%	2,171
Security	0.0%	0.1%	0

13,058 delay minutes on 133 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 2026?

76.9% of 628 scheduled domestic departures left less than 15 minutes late, and 74.2% reached their destination on time. The national figures that month were 72.2% and 72.8%.

How does that compare with a year earlier?

In June 2025, 72.0% of 682 departures left on time and 3.7% were cancelled, against 76.9% and 3.8% in June 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for June 2026; 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.