Denver International in October 2023

77.6%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 October 2023, reporting carriers scheduled 25,543 domestic departures from Denver International (DEN). 77.6% left less than 15 minutes late and 78.1% reached their destination on time; 0.4% were cancelled.

Nationally that month, 83.8% of flights departed on time and 84.0% arrived on time, so DEN departures were 6.2 points below the national departure figure.

Flights arriving at DEN that month were on time 82.5% of the time (25,544 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 42%, air carrier 39% and national aviation system 17%.

On time 78.1%
Arrived 15+ minutes late 21.3%
Cancelled 0.4%
Diverted 0.2%

Every scheduled departure from DEN in October 2023, judged by arrival at the destination.

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

Measure	Oct 2023	Year earlier	DEN, 12 months to Jul 2026	All reported flights, Oct 2023
Departed on time	77.6%	—	75.7%	83.8%
Arrived on time	78.1%	—	76.1%	84.0%
Cancelled	0.4%	—	0.7%	0.4%
Average departure delay (late minutes only)	13.2 min	—	16.5 min	11.0 min
Scheduled departures a day	851	—	875	19,966
Scheduled departures	25,543	—	319,208	598,968

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
UA United Airlines	8,684	34%	83.7%	0.0 min	0.1%
WN Southwest Airlines	8,580	34%	71.2%	10.1 min	0.2%
OO SkyWest Airlines	3,868	15%	79.6%	5.0 min	1.5%
F9 Frontier Airlines	2,169	8%	74.1%	10.4 min	0.4%
DL Delta Air Lines	1,047	4%	90.1%	-5.8 min	0.2%
AA American Airlines	728	3%	80.5%	5.0 min	0.3%
AS Alaska Airlines	151	1%	88.1%	-5.1 min	0.0%
B6 JetBlue Airways	148	1%	72.3%	11.1 min	0.7%
NK Spirit Airlines	124	0%	75.0%	12.2 min	1.6%
G4 Allegiant Air	44	0%	70.5%	32.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DEN–LAS	Denver to Las Vegas	805	72.9%	8.2 min	0.7%
DEN–PHX	Denver to Phoenix	772	75.6%	7.2 min	0.1%
DEN–SLC	Denver to Salt Lake City	674	80.4%	3.0 min	0.0%
DEN–LAX	Denver to Los Angeles	638	83.1%	-1.7 min	0.3%
DEN–SEA	Denver to Seattle	589	80.3%	1.0 min	0.3%
DEN–MSP	Denver to Minneapolis	578	79.4%	7.1 min	0.0%
DEN–ORD	Denver to Chicago	562	81.0%	2.9 min	0.2%
DEN–DFW	Denver to Dallas/Fort Worth	531	75.0%	10.4 min	0.6%
DEN–ATL	Denver to Atlanta	526	84.8%	2.0 min	0.0%
DEN–SAN	Denver to San Diego	479	77.9%	6.7 min	0.0%
DEN–LGA	Denver to New York	462	85.7%	-3.4 min	0.4%
DEN–SFO	Denver to San Francisco	461	76.4%	5.0 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), October 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Oct 2023	Minutes
Air carrier	38.5%	41.3%	115,238
Late-arriving aircraft	41.8%	40.5%	124,956
National Aviation System	16.8%	14.4%	50,191
Extreme weather	2.9%	3.7%	8,605
Security	0.1%	0.2%	239

299,229 delay minutes on 5,452 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 DEN on time in October 2023?

77.6% of 25,543 scheduled domestic departures left less than 15 minutes late, and 78.1% reached their destination on time. The national figures that month were 83.8% and 84.0%.

How does that compare with a year earlier?

October 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 October 2023; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for DEN · methodology · corrections.