James M Cox/Dayton International in May 2024

80.1%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 May 2024, reporting carriers scheduled 712 domestic departures from James M Cox/Dayton International (DAY). 80.1% left less than 15 minutes late and 77.4% reached their destination on time; 1.8% were cancelled.

Nationally that month, 73.4% of flights departed on time and 72.3% arrived on time, so DAY departures were 6.7 points above the national departure figure.

Flights arriving at DAY that month were on time 72.5% of the time (712 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 40%, air carrier 28% and national aviation system 23%.

On time 77.4%
Arrived 15+ minutes late 20.2%
Cancelled 1.8%
Diverted 0.6%

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

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

Measure	May 2024	Year earlier	DAY, 12 months to Jul 2026	All reported flights, May 2024
Departed on time	80.1%	—	78.8%	73.4%
Arrived on time	77.4%	—	77.4%	72.3%
Cancelled	1.8%	—	2.7%	1.4%
Average departure delay (late minutes only)	20.2 min	—	20.9 min	20.8 min
Scheduled departures a day	24	—	22	20,325
Scheduled departures	712	—	7,918	609,743

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OH PSA Airlines	323	45%	76.5%	12.6 min	1.5%
OO SkyWest Airlines	152	21%	67.8%	28.8 min	2.6%
DL Delta Air Lines	113	16%	89.4%	-6.9 min	0.9%
9E Endeavor Air	33	5%	90.9%	-9.0 min	0.0%
YX Republic Airline	33	5%	93.9%	-10.9 min	3.0%
MQ Envoy Air	31	4%	61.3%	22.2 min	3.2%
G4 Allegiant Air	27	4%	74.1%	18.3 min	3.7%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DAY–DFW	Dayton to Dallas/Fort Worth	123	69.1%	19.5 min	4.1%
DAY–ORD	Dayton to Chicago	123	64.2%	28.4 min	3.3%
DAY–CLT	Dayton to Charlotte	120	80.0%	8.0 min	0.0%
DAY–ATL	Dayton to Atlanta	119	89.9%	-7.4 min	0.8%
DAY–DCA	Dayton to Washington	111	76.6%	12.8 min	0.9%
DAY–LGA	Dayton to New York	57	91.2%	-9.1 min	1.8%
DAY–DEN	Dayton to Denver	31	83.9%	27.3 min	0.0%
DAY–PGD	Dayton to Punta Gorda	9	44.4%	67.8 min	0.0%
DAY–PIE	Dayton to St. Petersburg	9	88.9%	-6.0 min	11.1%
DAY–SFB	Dayton to Sanford	9	88.9%	-9.4 min	0.0%
DAY–PHL	Dayton to Philadelphia	1	100.0%	-7.0 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), May 2024.

Delay causes

BTS cause category	Share of delay minutes	National, May 2024	Minutes
Air carrier	28.0%	29.8%	4,038
Late-arriving aircraft	40.2%	43.0%	5,791
National Aviation System	22.8%	20.1%	3,280
Extreme weather	8.8%	7.0%	1,266
Security	0.2%	0.1%	24

14,399 delay minutes on 144 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 May 2024?

80.1% of 712 scheduled domestic departures left less than 15 minutes late, and 77.4% reached their destination on time. The national figures that month were 73.4% and 72.3%.

How does that compare with a year earlier?

May 2023 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 May 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.