Bozeman Yellowstone International in April 2025

83.1%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 April 2025, reporting carriers scheduled 568 domestic departures from Bozeman Yellowstone International (BZN). 83.1% left less than 15 minutes late and 81.9% reached their destination on time; 1.1% were cancelled.

Nationally that month, 80.6% of flights departed on time and 79.5% arrived on time, so BZN departures were 2.5 points above the national departure figure.

A year earlier, in April 2024, the airport had 643 departures with 87.9% leaving on time: a change of −4.8 points, with flights down 12%.

Flights arriving at BZN that month were on time 79.8% of the time (568 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 42%, air carrier 29% and national aviation system 22%.

On time 81.9%
Arrived 15+ minutes late 17.1%
Cancelled 1.1%
Diverted 0.0%

Every scheduled departure from BZN in April 2025, judged by arrival at the destination.

April 2025 against a year earlier, the airport's year and the nation

Measure	Apr 2025	Apr 2024	BZN, 12 months to Jul 2026	All reported flights, Apr 2025
Departed on time	83.1%	87.9%	79.6%	80.6%
Arrived on time	81.9%	83.5%	79.5%	79.5%
Cancelled	1.1%	0.5%	0.8%	0.8%
Average departure delay (late minutes only)	15.6 min	7.6 min	17.2 min	14.1 min
Scheduled departures a day	19	21	32	19,465
Scheduled departures	568	643	11,804	583,950

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	150	26%	84.7%	8.8 min	0.7%
UA United Airlines	126	22%	79.4%	7.8 min	1.6%
WN Southwest Airlines	121	21%	79.3%	0.3 min	0.8%
OO SkyWest Airlines	81	14%	93.8%	-13.2 min	1.2%
AA American Airlines	36	6%	61.1%	65.7 min	0.0%
AS Alaska Airlines	29	5%	89.7%	-7.8 min	3.4%
G4 Allegiant Air	25	4%	72.0%	-3.6 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BZN–DEN	Bozeman to Denver	184	78.8%	6.0 min	1.1%
BZN–SLC	Bozeman to Salt Lake City	67	85.1%	3.0 min	0.0%
BZN–MSP	Bozeman to Minneapolis	60	86.7%	21.3 min	0.0%
BZN–LAS	Bozeman to Las Vegas	42	81.0%	-4.2 min	0.0%
BZN–SFO	Bozeman to San Francisco	34	94.1%	-14.1 min	0.0%
BZN–DFW	Bozeman to Dallas/Fort Worth	33	60.6%	68.5 min	0.0%
BZN–ORD	Bozeman to Chicago	33	78.8%	5.7 min	3.0%
BZN–ATL	Bozeman to Atlanta	30	80.0%	-9.1 min	3.3%
BZN–LAX	Bozeman to Los Angeles	30	96.7%	-12.2 min	0.0%
BZN–SEA	Bozeman to Seattle	29	89.7%	-7.8 min	3.4%
BZN–AZA	Bozeman to Phoenix	9	44.4%	13.6 min	0.0%
BZN–PDX	Bozeman to Portland	9	88.9%	-10.2 min	11.1%

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), April 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2025	Minutes
Air carrier	28.6%	32.7%	2,555
Late-arriving aircraft	41.5%	39.4%	3,711
National Aviation System	21.9%	22.2%	1,955
Extreme weather	8.0%	5.5%	712
Security	0.0%	0.2%	0

8,933 delay minutes on 97 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 April 2025?

83.1% of 568 scheduled domestic departures left less than 15 minutes late, and 81.9% reached their destination on time. The national figures that month were 80.6% and 79.5%.

How does that compare with a year earlier?

In April 2024, 87.9% of 643 departures left on time and 0.5% were cancelled, against 83.1% and 1.1% in April 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 2025; 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.