Boise Air Terminal in July 2026

79.5%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 July 2026, reporting carriers scheduled 2,070 domestic departures from Boise Air Terminal (BOI). 79.5% left less than 15 minutes late and 78.0% reached their destination on time; 0.2% were cancelled.

Nationally that month, 68.8% of flights departed on time and 69.4% arrived on time, so BOI departures were 10.7 points above the national departure figure.

A year earlier, in July 2025, the airport had 2,136 departures with 82.5% leaving on time: a change of −3.0 points, with flights down 3%.

Flights arriving at BOI that month were on time 76.6% of the time (2,070 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 36%, air carrier 30% and late-arriving aircraft 30%.

On time 78.0%
Arrived 15+ minutes late 21.4%
Cancelled 0.2%
Diverted 0.4%

Every scheduled departure from BOI in July 2026, judged by arrival at the destination.

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

Measure	Jul 2026	Jul 2025	BOI, 12 months to Jul 2026	All reported flights, Jul 2026
Departed on time	79.5%	82.5%	83.9%	68.8%
Arrived on time	78.0%	81.6%	82.9%	69.4%
Cancelled	0.2%	0.6%	0.5%	2.6%
Average departure delay (late minutes only)	13.7 min	11.7 min	12.2 min	24.1 min
Scheduled departures a day	69	71	65	21,066
Scheduled departures	2,070	2,136	23,701	631,970

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	816	39%	80.5%	3.1 min	0.2%
WN Southwest Airlines	492	24%	78.7%	7.3 min	0.4%
DL Delta Air Lines	264	13%	83.7%	1.5 min	0.0%
AS Alaska Airlines	191	9%	78.5%	1.4 min	0.0%
UA United Airlines	154	7%	57.1%	30.7 min	0.0%
AA American Airlines	126	6%	75.4%	18.0 min	0.8%
F9 Frontier Airlines	13	1%	61.5%	30.2 min	0.0%
G4 Allegiant Air	13	1%	53.8%	50.5 min	0.0%
MQ Envoy Air	1	0%	100.0%	8.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BOI–SEA	Boise to Seattle	303	78.2%	2.4 min	0.0%
BOI–DEN	Boise to Denver	259	77.2%	10.5 min	0.4%
BOI–PHX	Boise to Phoenix	183	82.5%	3.9 min	0.0%
BOI–SFO	Boise to San Francisco	151	42.4%	31.9 min	0.0%
BOI–SLC	Boise to Salt Lake City	149	88.6%	-1.0 min	0.0%
BOI–LAX	Boise to Los Angeles	123	89.4%	0.5 min	0.0%
BOI–ORD	Boise to Chicago	93	67.7%	19.3 min	2.2%
BOI–DFW	Boise to Dallas/Fort Worth	91	78.0%	16.5 min	1.1%
BOI–LAS	Boise to Las Vegas	89	82.0%	8.1 min	1.1%
BOI–MSP	Boise to Minneapolis	89	84.3%	1.4 min	0.0%
BOI–SMF	Boise to Sacramento	89	87.6%	-1.2 min	0.0%
BOI–SAN	Boise to San Diego	80	70.0%	10.7 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), July 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2026	Minutes
Air carrier	29.8%	31.7%	8,318
Late-arriving aircraft	29.8%	41.8%	8,338
National Aviation System	35.9%	19.9%	10,040
Extreme weather	4.4%	6.5%	1,241
Security	0.1%	0.1%	22

27,959 delay minutes on 442 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 July 2026?

79.5% of 2,070 scheduled domestic departures left less than 15 minutes late, and 78.0% reached their destination on time. The national figures that month were 68.8% and 69.4%.

How does that compare with a year earlier?

In July 2025, 82.5% of 2,136 departures left on time and 0.6% were cancelled, against 79.5% and 0.2% in July 2026.

Provenance

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