Bozeman Yellowstone International in May 2026

81.9%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 2026, reporting carriers scheduled 849 domestic departures from Bozeman Yellowstone International (BZN). 81.9% left less than 15 minutes late and 82.0% reached their destination on time; 0.7% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so BZN departures were 4.8 points above the national departure figure.

A year earlier, in May 2025, the airport had 720 departures with 80.8% leaving on time: a change of +1.1 points, with flights up 18%.

Flights arriving at BZN that month were on time 79.4% of the time (850 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 41%, late-arriving aircraft 30% and national aviation system 24%.

On time 82.0%
Arrived 15+ minutes late 17.3%
Cancelled 0.7%
Diverted 0.0%

Every scheduled departure from BZN in May 2026, judged by arrival at the destination.

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

Measure	May 2026	May 2025	BZN, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	81.9%	80.8%	79.6%	77.1%
Arrived on time	82.0%	81.3%	79.5%	77.6%
Cancelled	0.7%	1.0%	0.8%	0.9%
Average departure delay (late minutes only)	13.0 min	14.4 min	17.2 min	16.0 min
Scheduled departures a day	28	24	32	20,391
Scheduled departures	849	720	11,804	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
UA United Airlines	238	28%	79.8%	-0.9 min	1.3%
OO SkyWest Airlines	171	20%	83.6%	2.0 min	0.0%
DL Delta Air Lines	159	19%	91.8%	-7.0 min	0.6%
WN Southwest Airlines	124	15%	78.2%	0.2 min	0.0%
AA American Airlines	81	10%	74.1%	16.4 min	2.5%
AS Alaska Airlines	43	5%	74.4%	9.3 min	0.0%
G4 Allegiant Air	33	4%	84.8%	24.4 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BZN–DEN	Bozeman to Denver	224	79.0%	0.2 min	0.0%
BZN–SEA	Bozeman to Seattle	124	81.5%	4.3 min	0.0%
BZN–ORD	Bozeman to Chicago	95	86.3%	-5.8 min	1.1%
BZN–SLC	Bozeman to Salt Lake City	93	87.1%	1.8 min	0.0%
BZN–MSP	Bozeman to Minneapolis	62	96.8%	-10.6 min	1.6%
BZN–DFW	Bozeman to Dallas/Fort Worth	52	71.2%	26.2 min	3.8%
BZN–LAS	Bozeman to Las Vegas	40	95.0%	6.5 min	0.0%
BZN–ATL	Bozeman to Atlanta	35	85.7%	-9.4 min	0.0%
BZN–LAX	Bozeman to Los Angeles	31	87.1%	-14.2 min	0.0%
BZN–SFO	Bozeman to San Francisco	31	38.7%	43.1 min	0.0%
BZN–BNA	Bozeman to Nashville	13	92.3%	-5.9 min	0.0%
BZN–PDX	Bozeman to Portland	12	83.3%	0.4 min	0.0%

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), May 2026.

Delay causes

BTS cause category	Share of delay minutes	National, May 2026	Minutes
Air carrier	41.0%	33.0%	4,134
Late-arriving aircraft	30.1%	40.4%	3,038
National Aviation System	23.7%	20.5%	2,397
Extreme weather	5.0%	6.0%	509
Security	0.2%	0.1%	16

10,094 delay minutes on 147 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 2026?

81.9% of 849 scheduled domestic departures left less than 15 minutes late, and 82.0% reached their destination on time. The national figures that month were 77.1% and 77.6%.

How does that compare with a year earlier?

In May 2025, 80.8% of 720 departures left on time and 1.0% were cancelled, against 81.9% and 0.7% in May 2026.

Provenance

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