James M Cox/Dayton International in July 2026

76.0%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 July 2026, reporting carriers scheduled 667 domestic departures from James M Cox/Dayton International (DAY). 76.0% left less than 15 minutes late and 75.1% reached their destination on time; 2.8% were cancelled.

Nationally that month, 68.8% of flights departed on time and 69.4% arrived on time, so DAY departures were 7.2 points above the national departure figure.

A year earlier, in July 2025, the airport had 592 departures with 73.5% leaving on time: a change of +2.5 points, with flights up 13%.

Flights arriving at DAY that month were on time 62.5% of the time (667 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 42%, air carrier 38% and national aviation system 18%.

On time 75.1%
Arrived 15+ minutes late 21.7%
Cancelled 2.8%
Diverted 0.3%

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

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

Measure	Jul 2026	Jul 2025	DAY, 12 months to Jul 2026	All reported flights, Jul 2026
Departed on time	76.0%	73.5%	78.8%	68.8%
Arrived on time	75.1%	74.2%	77.4%	69.4%
Cancelled	2.8%	2.9%	2.7%	2.6%
Average departure delay (late minutes only)	28.4 min	26.4 min	20.9 min	24.1 min
Scheduled departures a day	22	20	22	21,066
Scheduled departures	667	592	7,918	631,970

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OH PSA Airlines	337	51%	77.7%	13.7 min	2.1%
OO SkyWest Airlines	119	18%	67.2%	24.9 min	5.9%
DL Delta Air Lines	117	18%	72.6%	6.5 min	3.4%
G4 Allegiant Air	36	5%	52.8%	31.6 min	2.8%
UA United Airlines	31	5%	93.5%	35.0 min	0.0%
MQ Envoy Air	27	4%	96.3%	22.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DAY–ORD	Dayton to Chicago	146	72.6%	24.4 min	4.8%
DAY–ATL	Dayton to Atlanta	117	72.6%	6.5 min	3.4%
DAY–CLT	Dayton to Charlotte	115	78.3%	8.2 min	1.7%
DAY–DFW	Dayton to Dallas/Fort Worth	115	86.1%	-1.3 min	0.9%
DAY–DCA	Dayton to Washington	76	64.5%	52.4 min	2.6%
DAY–DEN	Dayton to Denver	31	93.5%	35.0 min	0.0%
DAY–PHL	Dayton to Philadelphia	31	77.4%	-4.6 min	6.5%
DAY–MYR	Dayton to Myrtle Beach	9	33.3%	27.9 min	11.1%
DAY–PGD	Dayton to Punta Gorda	9	100.0%	-13.0 min	0.0%
DAY–PIE	Dayton to St. Petersburg	9	44.4%	27.2 min	0.0%
DAY–SFB	Dayton to Sanford	9	33.3%	83.9 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), July 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2026	Minutes
Air carrier	38.4%	31.7%	6,989
Late-arriving aircraft	41.5%	41.8%	7,565
National Aviation System	17.5%	19.9%	3,193
Extreme weather	2.6%	6.5%	466
Security	0.0%	0.1%	0

18,213 delay minutes on 145 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 July 2026?

76.0% of 667 scheduled domestic departures left less than 15 minutes late, and 75.1% reached their destination on time. The national figures that month were 68.8% and 69.4%.

How does that compare with a year earlier?

In July 2025, 73.5% of 592 departures left on time and 2.9% were cancelled, against 76.0% and 2.8% in July 2026.

Provenance

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