John Glenn Columbus International in September 2024

88.5%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 September 2024, reporting carriers scheduled 3,549 domestic departures from John Glenn Columbus International (CMH). 88.5% left less than 15 minutes late and 87.5% reached their destination on time; 0.2% were cancelled.

Nationally that month, 84.4% of flights departed on time and 83.9% arrived on time, so CMH departures were 4.1 points above the national departure figure.

A year earlier, in September 2023, the airport had 3,485 departures with 85.2% leaving on time: a change of +3.3 points, with flights up 2%.

Flights arriving at CMH that month were on time 84.8% of the time (3,553 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 41%, late-arriving aircraft 38% and national aviation system 18%.

On time 87.5%
Arrived 15+ minutes late 12.2%
Cancelled 0.2%
Diverted 0.1%

Every scheduled departure from CMH 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	CMH, 12 months to Jul 2026	All reported flights, Sep 2024
Departed on time	88.5%	85.2%	79.6%	84.4%
Arrived on time	87.5%	83.8%	79.0%	83.9%
Cancelled	0.2%	1.8%	2.0%	0.6%
Average departure delay (late minutes only)	10.1 min	11.4 min	15.0 min	10.6 min
Scheduled departures a day	118	116	123	19,421
Scheduled departures	3,549	3,485	44,711	582,622

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
YX Republic Airline	997	28%	93.3%	-7.3 min	0.0%
WN Southwest Airlines	887	25%	89.5%	-1.1 min	0.5%
DL Delta Air Lines	317	9%	90.5%	-5.4 min	0.0%
AA American Airlines	295	8%	70.5%	32.7 min	0.3%
MQ Envoy Air	288	8%	85.8%	1.3 min	0.0%
UA United Airlines	259	7%	84.9%	-0.2 min	0.0%
NK Spirit Airlines	197	6%	81.7%	3.1 min	0.0%
OO SkyWest Airlines	132	4%	93.2%	-2.8 min	0.0%
OH PSA Airlines	110	3%	72.7%	18.7 min	2.7%
AS Alaska Airlines	48	1%	79.2%	-2.8 min	0.0%
F9 Frontier Airlines	10	0%	100.0%	0.7 min	0.0%
9E Endeavor Air	9	0%	77.8%	12.6 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CMH–ORD	Columbus to Chicago	336	83.0%	2.1 min	0.0%
CMH–ATL	Columbus to Atlanta	268	88.1%	1.5 min	0.0%
CMH–LGA	Columbus to New York	239	92.5%	-7.9 min	0.0%
CMH–BOS	Columbus to Boston	187	86.1%	0.6 min	0.0%
CMH–EWR	Columbus to Newark	177	95.5%	-12.7 min	0.0%
CMH–CLT	Columbus to Charlotte	171	73.1%	45.5 min	2.3%
CMH–DCA	Columbus to Washington	169	91.1%	-6.4 min	0.0%
CMH–DFW	Columbus to Dallas/Fort Worth	157	83.4%	6.9 min	0.0%
CMH–PHL	Columbus to Philadelphia	155	75.5%	5.4 min	0.0%
CMH–JFK	Columbus to New York	150	91.3%	-3.8 min	0.0%
CMH–DEN	Columbus to Denver	144	92.4%	-4.7 min	0.0%
CMH–DTW	Columbus to Detroit	140	94.3%	-4.5 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), September 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2024	Minutes
Air carrier	41.3%	38.6%	13,977
Late-arriving aircraft	37.5%	38.4%	12,708
National Aviation System	18.3%	18.2%	6,189
Extreme weather	2.9%	4.8%	993
Security	0.0%	0.1%	0

33,867 delay minutes on 434 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 CMH on time in September 2024?

88.5% of 3,549 scheduled domestic departures left less than 15 minutes late, and 87.5% 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, 85.2% of 3,485 departures left on time and 1.8% were cancelled, against 88.5% and 0.2% 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 CMH · methodology · corrections.