Boise Air Terminal in June 2026

77.8%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 June 2026, reporting carriers scheduled 2,002 domestic departures from Boise Air Terminal (BOI). 77.8% left less than 15 minutes late and 78.0% reached their destination on time; 0.6% were cancelled.

Nationally that month, 72.2% of flights departed on time and 72.8% arrived on time, so BOI departures were 5.6 points above the national departure figure.

A year earlier, in June 2025, the airport had 2,074 departures with 82.4% leaving on time: a change of −4.6 points, with flights down 3%.

Flights arriving at BOI that month were on time 72.9% of the time (2,003 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 39%, air carrier 33% and national aviation system 24%.

On time 78.0%
Arrived 15+ minutes late 21.0%
Cancelled 0.6%
Diverted 0.3%

Every scheduled departure from BOI 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	BOI, 12 months to Jul 2026	All reported flights, Jun 2026
Departed on time	77.8%	82.4%	83.9%	72.2%
Arrived on time	78.0%	81.1%	82.9%	72.8%
Cancelled	0.6%	0.6%	0.5%	1.6%
Average departure delay (late minutes only)	16.5 min	11.8 min	12.2 min	20.6 min
Scheduled departures a day	67	69	65	20,253
Scheduled departures	2,002	2,074	23,701	607,577

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	761	38%	84.2%	1.3 min	0.0%
WN Southwest Airlines	467	23%	72.6%	9.6 min	0.2%
DL Delta Air Lines	245	12%	85.3%	0.5 min	2.0%
AS Alaska Airlines	183	9%	82.0%	-0.7 min	0.0%
UA United Airlines	171	9%	61.4%	39.7 min	0.6%
AA American Airlines	120	6%	67.5%	17.4 min	4.2%
MQ Envoy Air	30	1%	66.7%	12.9 min	0.0%
F9 Frontier Airlines	13	1%	84.6%	2.1 min	0.0%
G4 Allegiant Air	12	1%	50.0%	39.7 min	8.3%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BOI–SEA	Boise to Seattle	312	81.7%	-1.8 min	0.0%
BOI–DEN	Boise to Denver	253	73.9%	12.3 min	0.0%
BOI–PHX	Boise to Phoenix	171	77.2%	17.7 min	0.6%
BOI–SLC	Boise to Salt Lake City	147	88.4%	-4.2 min	2.7%
BOI–SFO	Boise to San Francisco	132	40.2%	49.5 min	0.0%
BOI–LAX	Boise to Los Angeles	126	98.4%	-12.5 min	0.0%
BOI–LAS	Boise to Las Vegas	95	73.7%	8.5 min	0.0%
BOI–ORD	Boise to Chicago	91	72.5%	20.2 min	1.1%
BOI–DFW	Boise to Dallas/Fort Worth	90	68.9%	11.9 min	5.6%
BOI–SAN	Boise to San Diego	86	75.6%	6.1 min	0.0%
BOI–SMF	Boise to Sacramento	83	78.3%	8.3 min	0.0%
BOI–MSP	Boise to Minneapolis	81	79.0%	11.9 min	1.2%

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	33.3%	30.8%	10,219
Late-arriving aircraft	39.4%	42.1%	12,089
National Aviation System	23.6%	20.3%	7,251
Extreme weather	3.6%	6.7%	1,109
Security	0.0%	0.1%	0

30,668 delay minutes on 420 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 BOI on time in June 2026?

77.8% of 2,002 scheduled domestic departures left less than 15 minutes late, and 78.0% 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, 82.4% of 2,074 departures left on time and 0.6% were cancelled, against 77.8% and 0.6% 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 BOI · methodology · corrections.