James M Cox/Dayton International in January 2025

74.5%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 January 2025, reporting carriers scheduled 581 domestic departures from James M Cox/Dayton International (DAY). 74.5% left less than 15 minutes late and 71.1% reached their destination on time; 3.8% were cancelled.

Nationally that month, 79.3% of flights departed on time and 78.6% arrived on time, so DAY departures were 4.8 points below the national departure figure.

A year earlier, in January 2024, the airport had 577 departures with 80.4% leaving on time: a change of −5.9 points, with flights up 1%.

Flights arriving at DAY that month were on time 72.1% of the time (584 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 46%, late-arriving aircraft 32% and national aviation system 14%.

On time 71.1%
Arrived 15+ minutes late 25.1%
Cancelled 3.8%
Diverted 0.0%

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

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

Measure	Jan 2025	Jan 2024	DAY, 12 months to Jul 2026	All reported flights, Jan 2025
Departed on time	74.5%	80.4%	78.8%	79.3%
Arrived on time	71.1%	75.2%	77.4%	78.6%
Cancelled	3.8%	2.4%	2.7%	3.0%
Average departure delay (late minutes only)	29.8 min	18.5 min	20.9 min	14.0 min
Scheduled departures a day	19	19	22	17,992
Scheduled departures	581	577	7,918	539,747

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OH PSA Airlines	289	50%	68.5%	25.5 min	5.5%
OO SkyWest Airlines	135	23%	71.1%	26.0 min	1.5%
DL Delta Air Lines	77	13%	76.6%	4.0 min	2.6%
MQ Envoy Air	31	5%	74.2%	13.7 min	3.2%
YX Republic Airline	27	5%	81.5%	3.8 min	3.7%
G4 Allegiant Air	22	4%	68.2%	5.2 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DAY–CLT	Dayton to Charlotte	109	76.1%	18.7 min	2.8%
DAY–DFW	Dayton to Dallas/Fort Worth	109	67.0%	28.9 min	4.6%
DAY–ORD	Dayton to Chicago	104	68.3%	33.0 min	1.9%
DAY–DCA	Dayton to Washington	102	63.7%	25.5 min	8.8%
DAY–ATL	Dayton to Atlanta	77	76.6%	4.0 min	2.6%
DAY–DEN	Dayton to Denver	31	80.6%	2.7 min	0.0%
DAY–LGA	Dayton to New York	27	81.5%	3.8 min	3.7%
DAY–PGD	Dayton to Punta Gorda	11	54.5%	23.1 min	0.0%
DAY–PIE	Dayton to St. Petersburg	9	88.9%	-16.3 min	0.0%
DAY–SFB	Dayton to Sanford	2	50.0%	4.0 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), January 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jan 2025	Minutes
Air carrier	45.5%	36.2%	7,831
Late-arriving aircraft	32.0%	34.7%	5,500
National Aviation System	13.8%	19.9%	2,368
Extreme weather	8.7%	9.1%	1,492
Security	0.1%	0.2%	14

17,205 delay minutes on 146 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 January 2025?

74.5% of 581 scheduled domestic departures left less than 15 minutes late, and 71.1% reached their destination on time. The national figures that month were 79.3% and 78.6%.

How does that compare with a year earlier?

In January 2024, 80.4% of 577 departures left on time and 2.4% were cancelled, against 74.5% and 3.8% in January 2025.

Provenance

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