Bozeman Yellowstone International in May 2025

80.8%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 May 2025, reporting carriers scheduled 720 domestic departures from Bozeman Yellowstone International (BZN). 80.8% left less than 15 minutes late and 81.3% reached their destination on time; 1.0% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so BZN departures were 4.1 points above the national departure figure.

A year earlier, in May 2024, the airport had 719 departures with 82.5% leaving on time: a change of −1.7 points, with flights up 0%.

Flights arriving at BZN that month were on time 81.2% of the time (722 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 54%, late-arriving aircraft 22% and air carrier 22%.

On time 81.3%
Arrived 15+ minutes late 17.5%
Cancelled 1.0%
Diverted 0.3%

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

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

Measure	May 2025	May 2024	BZN, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	80.8%	82.5%	79.6%	76.7%
Arrived on time	81.3%	81.5%	79.5%	75.4%
Cancelled	1.0%	0.3%	0.8%	1.0%
Average departure delay (late minutes only)	14.4 min	17.5 min	17.2 min	17.5 min
Scheduled departures a day	24	24	32	20,188
Scheduled departures	720	719	11,804	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
UA United Airlines	191	27%	80.6%	6.6 min	1.0%
OO SkyWest Airlines	167	23%	88.6%	-1.9 min	1.8%
DL Delta Air Lines	130	18%	90.0%	-0.6 min	0.0%
WN Southwest Airlines	119	17%	73.1%	8.4 min	0.8%
AS Alaska Airlines	46	6%	63.0%	13.1 min	0.0%
G4 Allegiant Air	33	5%	84.8%	-4.6 min	0.0%
AA American Airlines	31	4%	61.3%	12.7 min	3.2%
B6 JetBlue Airways	3	0%	100.0%	-16.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BZN–DEN	Bozeman to Denver	207	67.1%	21.1 min	2.4%
BZN–SLC	Bozeman to Salt Lake City	87	95.4%	-10.1 min	0.0%
BZN–ORD	Bozeman to Chicago	70	97.1%	-10.3 min	0.0%
BZN–MSP	Bozeman to Minneapolis	62	90.3%	-7.4 min	0.0%
BZN–LAX	Bozeman to Los Angeles	58	96.6%	-16.2 min	1.7%
BZN–SEA	Bozeman to Seattle	46	63.0%	13.1 min	0.0%
BZN–LAS	Bozeman to Las Vegas	40	92.5%	-7.5 min	0.0%
BZN–ATL	Bozeman to Atlanta	31	77.4%	30.0 min	0.0%
BZN–DFW	Bozeman to Dallas/Fort Worth	31	61.3%	12.7 min	3.2%
BZN–SFO	Bozeman to San Francisco	31	93.5%	-12.4 min	0.0%
BZN–PDX	Bozeman to Portland	14	78.6%	-0.8 min	0.0%
BZN–BNA	Bozeman to Nashville	13	92.3%	-12.3 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), May 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	21.6%	29.3%	2,141
Late-arriving aircraft	22.0%	37.8%	2,184
National Aviation System	53.6%	25.9%	5,319
Extreme weather	2.6%	6.9%	254
Security	0.2%	0.1%	19

9,917 delay minutes on 126 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 May 2025?

80.8% of 720 scheduled domestic departures left less than 15 minutes late, and 81.3% reached their destination on time. The national figures that month were 76.7% and 75.4%.

How does that compare with a year earlier?

In May 2024, 82.5% of 719 departures left on time and 0.3% were cancelled, against 80.8% and 1.0% in May 2025.

Provenance

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