Denver International in June 2026

68.5%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 June 2026, reporting carriers scheduled 28,634 domestic departures from Denver International (DEN). 68.5% left less than 15 minutes late and 66.6% reached their destination on time; 0.4% were cancelled.

Nationally that month, 72.2% of flights departed on time and 72.8% arrived on time, so DEN departures were 3.7 points below the national departure figure.

A year earlier, in June 2025, the airport had 28,175 departures with 64.4% leaving on time: a change of +4.1 points, with flights up 2%.

Flights arriving at DEN that month were on time 72.4% of the time (28,634 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 45%, air carrier 30% and national aviation system 20%.

On time 66.6%
Arrived 15+ minutes late 32.7%
Cancelled 0.4%
Diverted 0.3%

Every scheduled departure from DEN in June 2026, judged by arrival at the destination.

June 2026 against a year earlier, the airport's year and the nation

Measure	Jun 2026	Jun 2025	DEN, 12 months to Jul 2026	All reported flights, Jun 2026
Departed on time	68.5%	64.4%	75.7%	72.2%
Arrived on time	66.6%	62.9%	76.1%	72.8%
Cancelled	0.4%	0.7%	0.7%	1.6%
Average departure delay (late minutes only)	21.9 min	27.9 min	16.5 min	20.6 min
Scheduled departures a day	955	939	875	20,253
Scheduled departures	28,634	28,175	319,208	607,577

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
UA United Airlines	9,694	34%	70.3%	14.2 min	0.1%
WN Southwest Airlines	8,029	28%	53.9%	23.5 min	0.5%
OO SkyWest Airlines	6,396	22%	72.3%	14.8 min	0.2%
F9 Frontier Airlines	2,150	8%	74.0%	10.1 min	0.7%
DL Delta Air Lines	1,049	4%	80.4%	4.2 min	0.9%
AA American Airlines	805	3%	64.1%	25.5 min	2.7%
AS Alaska Airlines	311	1%	74.9%	10.6 min	1.6%
B6 JetBlue Airways	137	0%	58.4%	26.6 min	2.2%
G4 Allegiant Air	62	0%	71.0%	17.4 min	1.6%
MQ Envoy Air	1	0%	0.0%	93.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
DEN–PHX	Denver to Phoenix	683	65.6%	19.9 min	0.7%
DEN–SLC	Denver to Salt Lake City	657	68.6%	13.6 min	0.2%
DEN–LAX	Denver to Los Angeles	654	66.2%	18.3 min	0.5%
DEN–SEA	Denver to Seattle	634	68.8%	15.3 min	1.3%
DEN–LAS	Denver to Las Vegas	593	64.8%	19.9 min	0.8%
DEN–MSP	Denver to Minneapolis	548	69.7%	12.2 min	0.5%
DEN–DFW	Denver to Dallas/Fort Worth	539	60.7%	27.4 min	3.0%
DEN–ORD	Denver to Chicago	537	65.4%	26.3 min	1.1%
DEN–SAN	Denver to San Diego	525	64.8%	15.3 min	0.4%
DEN–ATL	Denver to Atlanta	516	72.7%	9.7 min	0.2%
DEN–AUS	Denver to Austin	502	64.1%	16.5 min	0.4%
DEN–SFO	Denver to San Francisco	494	39.3%	37.1 min	0.4%

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), June 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2026	Minutes
Air carrier	29.7%	30.8%	177,171
Late-arriving aircraft	44.9%	42.1%	267,979
National Aviation System	19.8%	20.3%	117,858
Extreme weather	5.6%	6.7%	33,387
Security	0.1%	0.1%	345

596,740 delay minutes on 9,351 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 June 2026?

68.5% of 28,634 scheduled domestic departures left less than 15 minutes late, and 66.6% reached their destination on time. The national figures that month were 72.2% and 72.8%.

How does that compare with a year earlier?

In June 2025, 64.4% of 28,175 departures left on time and 0.7% were cancelled, against 68.5% and 0.4% in June 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for June 2026; 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.