Boise Air Terminal in August 2024

84.6%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 August 2024, reporting carriers scheduled 2,097 domestic departures from Boise Air Terminal (BOI). 84.6% left less than 15 minutes late and 82.5% reached their destination on time; 0.4% were cancelled.

Nationally that month, 75.4% of flights departed on time and 74.7% arrived on time, so BOI departures were 9.2 points above the national departure figure.

A year earlier, in August 2023, the airport had 1,777 departures with 82.7% leaving on time: a change of +1.9 points, with flights up 18%.

Flights arriving at BOI that month were on time 79.5% of the time (2,100 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 43%, late-arriving aircraft 32% and national aviation system 23%.

On time 82.5%
Arrived 15+ minutes late 16.9%
Cancelled 0.4%
Diverted 0.2%

Every scheduled departure from BOI in August 2024, judged by arrival at the destination.

August 2024 against a year earlier, the airport's year and the nation

Measure	Aug 2024	Aug 2023	BOI, 12 months to Jul 2026	All reported flights, Aug 2024
Departed on time	84.6%	82.7%	83.9%	75.4%
Arrived on time	82.5%	81.3%	82.9%	74.7%
Cancelled	0.4%	0.5%	0.5%	2.1%
Average departure delay (late minutes only)	10.2 min	12.1 min	12.2 min	18.4 min
Scheduled departures a day	70	59	65	20,634
Scheduled departures	2,097	1,777	23,701	619,025

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	1,065	51%	81.7%	6.0 min	0.0%
WN Southwest Airlines	424	20%	86.1%	-1.3 min	0.2%
DL Delta Air Lines	271	13%	83.4%	3.3 min	0.4%
UA United Airlines	163	8%	81.0%	-1.5 min	3.1%
AA American Airlines	72	3%	90.3%	-1.5 min	0.0%
NK Spirit Airlines	43	2%	65.1%	27.4 min	2.3%
AS Alaska Airlines	34	2%	70.6%	9.0 min	0.0%
G4 Allegiant Air	25	1%	84.0%	-1.2 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BOI–SEA	Boise to Seattle	310	73.2%	8.5 min	0.0%
BOI–DEN	Boise to Denver	245	85.3%	-2.7 min	1.6%
BOI–PHX	Boise to Phoenix	154	73.4%	10.2 min	0.0%
BOI–LAX	Boise to Los Angeles	153	95.4%	-3.9 min	0.0%
BOI–SFO	Boise to San Francisco	133	77.4%	9.1 min	0.8%
BOI–SLC	Boise to Salt Lake City	133	85.0%	1.0 min	0.8%
BOI–LAS	Boise to Las Vegas	127	82.7%	5.5 min	0.8%
BOI–PDX	Boise to Portland	111	91.0%	3.0 min	0.0%
BOI–GEG	Boise to Spokane	110	80.9%	11.7 min	0.0%
BOI–SMF	Boise to Sacramento	91	83.5%	2.5 min	0.0%
BOI–MSP	Boise to Minneapolis	90	78.9%	8.7 min	0.0%
BOI–DFW	Boise to Dallas/Fort Worth	72	90.3%	-1.5 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), August 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2024	Minutes
Air carrier	42.9%	33.8%	9,209
Late-arriving aircraft	32.3%	39.8%	6,934
National Aviation System	22.9%	20.4%	4,917
Extreme weather	1.7%	5.9%	360
Security	0.2%	0.1%	53

21,473 delay minutes on 354 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 August 2024?

84.6% of 2,097 scheduled domestic departures left less than 15 minutes late, and 82.5% reached their destination on time. The national figures that month were 75.4% and 74.7%.

How does that compare with a year earlier?

In August 2023, 82.7% of 1,777 departures left on time and 0.5% were cancelled, against 84.6% and 0.4% in August 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2024; 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.