Denver International in August 2023

70.8%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 August 2023, reporting carriers scheduled 26,308 domestic departures from Denver International (DEN). 70.8% left less than 15 minutes late and 72.4% reached their destination on time; 1.1% were cancelled.

Nationally that month, 76.7% of flights departed on time and 76.9% arrived on time, so DEN departures were 5.9 points below the national departure figure.

Flights arriving at DEN that month were on time 75.4% of the time (26,300 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 50%, air carrier 36% and national aviation system 11%.

On time 72.4%
Arrived 15+ minutes late 26.2%
Cancelled 1.1%
Diverted 0.3%

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

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

Measure	Aug 2023	Year earlier	DEN, 12 months to Jul 2026	All reported flights, Aug 2023
Departed on time	70.8%	—	75.7%	76.7%
Arrived on time	72.4%	—	76.1%	76.9%
Cancelled	1.1%	—	0.7%	1.5%
Average departure delay (late minutes only)	18.6 min	—	16.5 min	17.3 min
Scheduled departures a day	877	—	875	20,100
Scheduled departures	26,308	—	319,208	602,987

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	8,727	33%	66.1%	13.6 min	1.2%
UA United Airlines	8,712	33%	76.4%	7.5 min	0.9%
OO SkyWest Airlines	4,267	16%	76.8%	10.1 min	0.8%
F9 Frontier Airlines	2,134	8%	67.0%	16.6 min	2.6%
DL Delta Air Lines	1,127	4%	83.5%	0.6 min	0.8%
AA American Airlines	739	3%	75.2%	15.9 min	1.4%
AS Alaska Airlines	216	1%	79.2%	5.9 min	0.0%
B6 JetBlue Airways	192	1%	60.4%	33.7 min	1.6%
NK Spirit Airlines	142	1%	69.0%	15.6 min	0.7%
G4 Allegiant Air	52	0%	63.5%	16.1 min	1.9%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DEN–LAS	Denver to Las Vegas	841	68.3%	12.9 min	1.9%
DEN–PHX	Denver to Phoenix	756	73.7%	9.3 min	1.5%
DEN–SLC	Denver to Salt Lake City	680	74.3%	8.0 min	1.3%
DEN–SEA	Denver to Seattle	650	75.4%	5.8 min	0.2%
DEN–LAX	Denver to Los Angeles	637	74.1%	11.4 min	0.8%
DEN–MSP	Denver to Minneapolis	583	74.6%	10.5 min	0.3%
DEN–ORD	Denver to Chicago	578	72.3%	11.5 min	1.0%
DEN–ATL	Denver to Atlanta	545	73.0%	9.1 min	1.7%
DEN–DFW	Denver to Dallas/Fort Worth	532	74.2%	13.9 min	1.7%
DEN–LGA	Denver to New York	491	74.1%	4.6 min	2.0%
DEN–SFO	Denver to San Francisco	484	71.9%	13.5 min	0.6%
DEN–SAN	Denver to San Diego	482	70.7%	11.1 min	3.9%

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), August 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2023	Minutes
Air carrier	36.1%	36.7%	151,252
Late-arriving aircraft	50.3%	42.2%	211,098
National Aviation System	10.6%	15.7%	44,648
Extreme weather	2.9%	5.1%	12,237
Security	0.1%	0.2%	243

419,478 delay minutes on 6,903 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 August 2023?

70.8% of 26,308 scheduled domestic departures left less than 15 minutes late, and 72.4% reached their destination on time. The national figures that month were 76.7% and 76.9%.

How does that compare with a year earlier?

August 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 August 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.