Idaho Falls Regional in August 2025

79.8%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 August 2025, reporting carriers scheduled 451 domestic departures from Idaho Falls Regional (IDA). 79.8% left less than 15 minutes late and 75.2% reached their destination on time; 1.1% were cancelled.

Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so IDA departures were 3.0 points above the national departure figure.

A year earlier, in August 2024, the airport had 312 departures with 85.6% leaving on time: a change of −5.8 points, with flights up 45%.

Flights arriving at IDA that month were on time 77.4% of the time (451 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 43%, air carrier 27% and national aviation system 20%.

On time 75.2%
Arrived 15+ minutes late 22.0%
Cancelled 1.1%
Diverted 1.8%

Every scheduled departure from IDA in August 2025, judged by arrival at the destination.

August 2025 against a year earlier, the airport's year and the nation

Measure	Aug 2025	Aug 2024	IDA, 12 months to Jul 2026	All reported flights, Aug 2025
Departed on time	79.8%	85.6%	82.1%	76.8%
Arrived on time	75.2%	84.9%	80.5%	76.3%
Cancelled	1.1%	0.0%	0.7%	1.1%
Average departure delay (late minutes only)	23.7 min	7.6 min	21.1 min	17.6 min
Scheduled departures a day	15	10	13	20,079
Scheduled departures	451	312	4,724	602,378

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	360	80%	72.8%	10.1 min	1.4%
G4 Allegiant Air	60	13%	78.3%	61.9 min	0.0%
DL Delta Air Lines	31	7%	96.8%	-9.9 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
IDA–DEN	Idaho Falls to Denver	190	64.2%	16.6 min	2.6%
IDA–SLC	Idaho Falls to Salt Lake City	122	95.9%	-6.3 min	0.0%
IDA–DFW	Idaho Falls to Dallas/Fort Worth	62	67.7%	11.0 min	0.0%
IDA–ORD	Idaho Falls to Chicago	26	65.4%	14.5 min	0.0%
IDA–AZA	Idaho Falls to Phoenix	20	95.0%	-12.9 min	0.0%
IDA–LAS	Idaho Falls to Las Vegas	9	66.7%	147.1 min	0.0%
IDA–OAK	Idaho Falls to Oakland	9	66.7%	125.2 min	0.0%
IDA–SNA	Idaho Falls to Santa Ana	9	100.0%	-10.2 min	0.0%
IDA–PDX	Idaho Falls to Portland	4	25.0%	377.5 min	0.0%

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), August 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2025	Minutes
Air carrier	27.1%	33.1%	2,870
Late-arriving aircraft	43.4%	40.5%	4,592
National Aviation System	20.1%	19.2%	2,129
Extreme weather	9.3%	7.0%	988
Security	0.0%	0.1%	0

10,579 delay minutes on 99 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 IDA on time in August 2025?

79.8% of 451 scheduled domestic departures left less than 15 minutes late, and 75.2% reached their destination on time. The national figures that month were 76.8% and 76.3%.

How does that compare with a year earlier?

In August 2024, 85.6% of 312 departures left on time and 0.0% were cancelled, against 79.8% and 1.1% in August 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for IDA · methodology · corrections.