Bozeman Yellowstone International in September 2023

86.4%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 2023, reporting carriers scheduled 809 domestic departures from Bozeman Yellowstone International (BZN). 86.4% left less than 15 minutes late and 84.4% reached their destination on time; 0.1% were cancelled.

Nationally that month, 80.5% of flights departed on time and 80.1% arrived on time, so BZN departures were 5.9 points above the national departure figure.

Flights arriving at BZN that month were on time 84.5% of the time (808 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 50%, late-arriving aircraft 25% and national aviation system 25%.

On time 84.4%
Arrived 15+ minutes late 15.2%
Cancelled 0.1%
Diverted 0.2%

Every scheduled departure from BZN in September 2023, judged by arrival at the destination.

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

Measure	Sep 2023	Year earlier	BZN, 12 months to Jul 2026	All reported flights, Sep 2023
Departed on time	86.4%	—	79.6%	80.5%
Arrived on time	84.4%	—	79.5%	80.1%
Cancelled	0.1%	—	0.8%	1.2%
Average departure delay (late minutes only)	10.1 min	—	17.2 min	14.1 min
Scheduled departures a day	27	—	32	18,978
Scheduled departures	809	—	11,804	569,338

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	167	21%	75.4%	9.7 min	0.0%
UA United Airlines	165	20%	82.4%	1.2 min	0.6%
DL Delta Air Lines	147	18%	91.8%	-3.5 min	0.0%
OO SkyWest Airlines	136	17%	93.4%	-5.5 min	0.0%
AA American Airlines	89	11%	80.9%	4.7 min	0.0%
AS Alaska Airlines	64	8%	89.1%	-6.6 min	0.0%
G4 Allegiant Air	36	4%	69.4%	45.9 min	0.0%
B6 JetBlue Airways	5	1%	100.0%	-13.6 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BZN–DEN	Bozeman to Denver	229	80.3%	4.4 min	0.0%
BZN–SLC	Bozeman to Salt Lake City	93	91.4%	-2.4 min	0.0%
BZN–ORD	Bozeman to Chicago	83	80.7%	0.8 min	0.0%
BZN–SEA	Bozeman to Seattle	64	89.1%	-6.6 min	0.0%
BZN–LAS	Bozeman to Las Vegas	63	74.6%	10.8 min	0.0%
BZN–MSP	Bozeman to Minneapolis	63	92.1%	-3.7 min	0.0%
BZN–DFW	Bozeman to Dallas/Fort Worth	60	85.0%	4.2 min	0.0%
BZN–LAX	Bozeman to Los Angeles	33	90.9%	1.4 min	0.0%
BZN–SFO	Bozeman to San Francisco	33	97.0%	-7.7 min	0.0%
BZN–EWR	Bozeman to Newark	28	92.9%	-11.2 min	3.6%
BZN–ATL	Bozeman to Atlanta	22	86.4%	-6.5 min	0.0%
BZN–BNA	Bozeman to Nashville	18	61.1%	21.1 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), September 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2023	Minutes
Air carrier	50.0%	36.4%	3,846
Late-arriving aircraft	24.9%	38.3%	1,915
National Aviation System	24.6%	19.9%	1,892
Extreme weather	0.3%	5.1%	26
Security	0.2%	0.2%	19

7,698 delay minutes on 123 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 BZN on time in September 2023?

86.4% of 809 scheduled domestic departures left less than 15 minutes late, and 84.4% reached their destination on time. The national figures that month were 80.5% and 80.1%.

How does that compare with a year earlier?

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