Boise Air Terminal in October 2023

87.9%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 October 2023, reporting carriers scheduled 1,918 domestic departures from Boise Air Terminal (BOI). 87.9% left less than 15 minutes late and 87.2% reached their destination on time; 0.2% were cancelled.

Nationally that month, 83.8% of flights departed on time and 84.0% arrived on time, so BOI departures were 4.1 points above the national departure figure.

Flights arriving at BOI that month were on time 85.7% of the time (1,919 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 38% and national aviation system 16%.

On time 87.2%
Arrived 15+ minutes late 12.6%
Cancelled 0.2%
Diverted 0.1%

Every scheduled departure from BOI in October 2023, judged by arrival at the destination.

October 2023 against a year earlier, the airport's year and the nation

Measure	Oct 2023	Year earlier	BOI, 12 months to Jul 2026	All reported flights, Oct 2023
Departed on time	87.9%	—	83.9%	83.8%
Arrived on time	87.2%	—	82.9%	84.0%
Cancelled	0.2%	—	0.5%	0.4%
Average departure delay (late minutes only)	10.4 min	—	12.2 min	11.0 min
Scheduled departures a day	64	—	65	19,966
Scheduled departures	1,918	—	23,701	598,968

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	782	41%	87.7%	-2.3 min	0.0%
WN Southwest Airlines	375	20%	82.4%	0.7 min	0.0%
DL Delta Air Lines	260	14%	93.5%	-5.9 min	0.0%
UA United Airlines	179	9%	91.1%	2.8 min	0.0%
AA American Airlines	145	8%	81.4%	31.1 min	0.7%
AS Alaska Airlines	92	5%	88.0%	-2.7 min	0.0%
NK Spirit Airlines	59	3%	88.1%	-1.2 min	3.4%
G4 Allegiant Air	26	1%	76.9%	2.9 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BOI–SEA	Boise to Seattle	393	86.8%	-4.8 min	0.0%
BOI–DEN	Boise to Denver	212	88.2%	-0.7 min	0.0%
BOI–LAS	Boise to Las Vegas	147	78.9%	3.0 min	1.4%
BOI–SLC	Boise to Salt Lake City	147	93.9%	-6.6 min	0.0%
BOI–PHX	Boise to Phoenix	125	86.4%	21.1 min	0.0%
BOI–SFO	Boise to San Francisco	124	86.3%	0.5 min	0.0%
BOI–LAX	Boise to Los Angeles	98	94.9%	-8.6 min	0.0%
BOI–DFW	Boise to Dallas/Fort Worth	87	79.3%	19.8 min	1.1%
BOI–GEG	Boise to Spokane	80	85.0%	1.8 min	0.0%
BOI–SJC	Boise to San Jose	75	89.3%	-1.8 min	0.0%
BOI–PDX	Boise to Portland	70	78.6%	9.0 min	0.0%
BOI–SAN	Boise to San Diego	63	90.5%	-4.5 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), October 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Oct 2023	Minutes
Air carrier	37.8%	41.3%	6,893
Late-arriving aircraft	43.7%	40.5%	7,965
National Aviation System	15.7%	14.4%	2,871
Extreme weather	2.8%	3.7%	513
Security	0.0%	0.2%	0

18,242 delay minutes on 242 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 October 2023?

87.9% of 1,918 scheduled domestic departures left less than 15 minutes late, and 87.2% reached their destination on time. The national figures that month were 83.8% and 84.0%.

How does that compare with a year earlier?

October 2022 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for October 2023; 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.