James M Cox/Dayton International in September 2023

87.0%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 September 2023, reporting carriers scheduled 615 domestic departures from James M Cox/Dayton International (DAY). 87.0% left less than 15 minutes late and 82.4% reached their destination on time; 0.8% were cancelled.

Nationally that month, 80.5% of flights departed on time and 80.1% arrived on time, so DAY departures were 6.5 points above the national departure figure.

Flights arriving at DAY that month were on time 81.0% of the time (616 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 44%, national aviation system 36% and late-arriving aircraft 20%.

On time 82.4%
Arrived 15+ minutes late 16.6%
Cancelled 0.8%
Diverted 0.2%

Every scheduled departure from DAY in September 2023, judged by arrival at the destination.

September 2023 against a year earlier, the airport's year and the nation

Measure	Sep 2023	Year earlier	DAY, 12 months to Jul 2026	All reported flights, Sep 2023
Departed on time	87.0%	—	78.8%	80.5%
Arrived on time	82.4%	—	77.4%	80.1%
Cancelled	0.8%	—	2.7%	1.2%
Average departure delay (late minutes only)	12.4 min	—	20.9 min	14.1 min
Scheduled departures a day	21	—	22	18,978
Scheduled departures	615	—	7,918	569,338

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OH PSA Airlines	295	48%	79.7%	4.4 min	0.7%
OO SkyWest Airlines	121	20%	74.4%	14.3 min	0.0%
DL Delta Air Lines	110	18%	98.2%	-6.0 min	0.0%
9E Endeavor Air	29	5%	89.7%	-13.6 min	6.9%
YX Republic Airline	25	4%	80.0%	22.9 min	4.0%
MQ Envoy Air	18	3%	88.9%	-9.9 min	0.0%
G4 Allegiant Air	17	3%	70.6%	-1.6 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DAY–ORD	Dayton to Chicago	119	73.9%	14.9 min	0.0%
DAY–ATL	Dayton to Atlanta	114	97.4%	-6.3 min	0.9%
DAY–CLT	Dayton to Charlotte	106	74.5%	3.9 min	0.0%
DAY–DCA	Dayton to Washington	105	76.2%	13.2 min	1.9%
DAY–DFW	Dayton to Dallas/Fort Worth	102	90.2%	-6.5 min	0.0%
DAY–LGA	Dayton to New York	50	86.0%	4.8 min	4.0%
DAY–PIE	Dayton to St. Petersburg	9	88.9%	-8.1 min	0.0%
DAY–PGD	Dayton to Punta Gorda	8	50.0%	6.7 min	0.0%
DAY–DEN	Dayton to Denver	2	100.0%	-22.5 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), September 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2023	Minutes
Air carrier	44.2%	36.4%	3,615
Late-arriving aircraft	19.9%	38.3%	1,625
National Aviation System	35.9%	19.9%	2,931
Extreme weather	0.0%	5.1%	0
Security	0.0%	0.2%	0

8,171 delay minutes on 102 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 2023?

87.0% of 615 scheduled domestic departures left less than 15 minutes late, and 82.4% reached their destination on time. The national figures that month were 80.5% and 80.1%.

How does that compare with a year earlier?

September 2022 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2023; 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.