Boise Air Terminal in May 2024

83.9%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 2024, reporting carriers scheduled 2,016 domestic departures from Boise Air Terminal (BOI). 83.9% left less than 15 minutes late and 82.8% reached their destination on time; 0.4% were cancelled.

Nationally that month, 73.4% of flights departed on time and 72.3% arrived on time, so BOI departures were 10.5 points above the national departure figure.

Flights arriving at BOI that month were on time 79.2% of the time (2,020 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 36%, late-arriving aircraft 34% and national aviation system 25%.

On time 82.8%
Arrived 15+ minutes late 16.4%
Cancelled 0.4%
Diverted 0.4%

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

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

Measure	May 2024	Year earlier	BOI, 12 months to Jul 2026	All reported flights, May 2024
Departed on time	83.9%	—	83.9%	73.4%
Arrived on time	82.8%	—	82.9%	72.3%
Cancelled	0.4%	—	0.5%	1.4%
Average departure delay (late minutes only)	9.9 min	—	12.2 min	20.8 min
Scheduled departures a day	67	—	65	20,325
Scheduled departures	2,016	—	23,701	609,743

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	1,063	53%	81.6%	4.3 min	0.0%
WN Southwest Airlines	361	18%	87.0%	-0.1 min	0.0%
DL Delta Air Lines	217	11%	88.9%	0.9 min	0.0%
UA United Airlines	115	6%	84.3%	-0.4 min	2.6%
AA American Airlines	63	3%	68.3%	16.9 min	6.3%
MQ Envoy Air	62	3%	88.7%	0.4 min	1.6%
NK Spirit Airlines	55	3%	81.8%	0.7 min	0.0%
AS Alaska Airlines	47	2%	66.0%	9.9 min	0.0%
G4 Allegiant Air	33	2%	72.7%	2.2 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BOI–SEA	Boise to Seattle	362	83.1%	2.9 min	0.0%
BOI–DEN	Boise to Denver	239	85.8%	-2.3 min	1.3%
BOI–PHX	Boise to Phoenix	158	86.7%	11.1 min	0.6%
BOI–SLC	Boise to Salt Lake City	150	86.0%	3.2 min	0.0%
BOI–LAS	Boise to Las Vegas	146	81.5%	2.7 min	0.0%
BOI–LAX	Boise to Los Angeles	121	86.0%	-0.6 min	0.0%
BOI–PDX	Boise to Portland	113	92.0%	0.1 min	0.0%
BOI–SFO	Boise to San Francisco	113	58.4%	10.6 min	0.0%
BOI–GEG	Boise to Spokane	91	91.2%	1.5 min	0.0%
BOI–SMF	Boise to Sacramento	77	84.4%	4.3 min	0.0%
BOI–SAN	Boise to San Diego	68	86.8%	-1.0 min	0.0%
BOI–DFW	Boise to Dallas/Fort Worth	63	68.3%	16.9 min	6.3%

By scheduled departure hour

100

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), May 2024.

Delay causes

BTS cause category	Share of delay minutes	National, May 2024	Minutes
Air carrier	35.5%	29.8%	6,792
Late-arriving aircraft	34.3%	43.0%	6,561
National Aviation System	25.0%	20.1%	4,785
Extreme weather	5.3%	7.0%	1,015
Security	0.0%	0.1%	0

19,153 delay minutes on 331 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 May 2024?

83.9% of 2,016 scheduled domestic departures left less than 15 minutes late, and 82.8% reached their destination on time. The national figures that month were 73.4% and 72.3%.

How does that compare with a year earlier?

May 2023 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 May 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.