James M Cox/Dayton International in September 2024

87.7%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 September 2024, reporting carriers scheduled 666 domestic departures from James M Cox/Dayton International (DAY). 87.7% left less than 15 minutes late and 86.6% reached their destination on time; 0.3% were cancelled.

Nationally that month, 84.4% of flights departed on time and 83.9% arrived on time, so DAY departures were 3.3 points above the national departure figure.

A year earlier, in September 2023, the airport had 615 departures with 87.0% leaving on time: a change of +0.7 points, with flights up 8%.

Flights arriving at DAY that month were on time 81.1% of the time (667 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 35% and national aviation system 20%.

On time 86.6%
Arrived 15+ minutes late 12.9%
Cancelled 0.3%
Diverted 0.2%

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

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

Measure	Sep 2024	Sep 2023	DAY, 12 months to Jul 2026	All reported flights, Sep 2024
Departed on time	87.7%	87.0%	78.8%	84.4%
Arrived on time	86.6%	82.4%	77.4%	83.9%
Cancelled	0.3%	0.8%	2.7%	0.6%
Average departure delay (late minutes only)	10.5 min	12.4 min	20.9 min	10.6 min
Scheduled departures a day	22	21	22	19,421
Scheduled departures	666	615	7,918	582,622

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OH PSA Airlines	320	48%	81.6%	2.3 min	0.3%
OO SkyWest Airlines	176	26%	88.1%	1.3 min	0.0%
DL Delta Air Lines	108	16%	92.6%	-11.1 min	0.0%
9E Endeavor Air	28	4%	100.0%	-17.3 min	0.0%
YX Republic Airline	24	4%	100.0%	-5.4 min	0.0%
G4 Allegiant Air	10	2%	90.0%	-16.1 min	10.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DAY–DFW	Dayton to Dallas/Fort Worth	120	75.0%	8.6 min	0.0%
DAY–ORD	Dayton to Chicago	120	86.7%	1.1 min	0.0%
DAY–CLT	Dayton to Charlotte	116	82.8%	7.7 min	0.0%
DAY–ATL	Dayton to Atlanta	110	92.7%	-11.2 min	0.0%
DAY–DCA	Dayton to Washington	85	88.2%	-5.8 min	1.2%
DAY–LGA	Dayton to New York	49	100.0%	-11.5 min	0.0%
DAY–DEN	Dayton to Denver	30	96.7%	-13.1 min	0.0%
DAY–PHL	Dayton to Philadelphia	26	88.5%	-9.3 min	0.0%
DAY–PIE	Dayton to St. Petersburg	10	90.0%	-16.1 min	10.0%

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), September 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2024	Minutes
Air carrier	35.4%	38.6%	2,401
Late-arriving aircraft	43.9%	38.4%	2,978
National Aviation System	19.9%	18.2%	1,350
Extreme weather	0.2%	4.8%	11
Security	0.7%	0.1%	46

6,786 delay minutes on 86 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 September 2024?

87.7% of 666 scheduled domestic departures left less than 15 minutes late, and 86.6% reached their destination on time. The national figures that month were 84.4% and 83.9%.

How does that compare with a year earlier?

In September 2023, 87.0% of 615 departures left on time and 0.8% were cancelled, against 87.7% and 0.3% in September 2024.

Provenance

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