Idaho Falls Regional in May 2025

83.8%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 May 2025, reporting carriers scheduled 359 domestic departures from Idaho Falls Regional (IDA). 83.8% left less than 15 minutes late and 79.9% reached their destination on time; 0.8% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so IDA departures were 7.1 points above the national departure figure.

A year earlier, in May 2024, the airport had 334 departures with 85.3% leaving on time: a change of −1.5 points, with flights up 7%.

Flights arriving at IDA that month were on time 77.8% of the time (360 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 56%, national aviation system 22% and late-arriving aircraft 13%.

On time 79.9%
Arrived 15+ minutes late 17.8%
Cancelled 0.8%
Diverted 1.4%

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

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

Measure	May 2025	May 2024	IDA, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	83.8%	85.3%	82.1%	76.7%
Arrived on time	79.9%	85.9%	80.5%	75.4%
Cancelled	0.8%	0.6%	0.7%	1.0%
Average departure delay (late minutes only)	18.2 min	12.3 min	21.1 min	17.5 min
Scheduled departures a day	12	11	13	20,188
Scheduled departures	359	334	4,724	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	277	77%	78.7%	6.6 min	1.1%
G4 Allegiant Air	51	14%	80.4%	25.7 min	0.0%
DL Delta Air Lines	31	9%	90.3%	0.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
IDA–DEN	Idaho Falls to Denver	156	69.9%	15.2 min	1.3%
IDA–SLC	Idaho Falls to Salt Lake City	93	92.5%	-4.8 min	0.0%
IDA–DFW	Idaho Falls to Dallas/Fort Worth	58	81.0%	3.9 min	1.7%
IDA–AZA	Idaho Falls to Phoenix	18	83.3%	0.2 min	0.0%
IDA–LAS	Idaho Falls to Las Vegas	9	88.9%	2.0 min	0.0%
IDA–PDX	Idaho Falls to Portland	9	88.9%	-7.1 min	0.0%
IDA–SNA	Idaho Falls to Santa Ana	9	77.8%	134.0 min	0.0%
IDA–PHX	Idaho Falls to Phoenix	4	100.0%	-11.7 min	0.0%
IDA–OAK	Idaho Falls to Oakland	3	100.0%	-26.7 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), May 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	55.6%	29.3%	3,747
Late-arriving aircraft	13.4%	37.8%	901
National Aviation System	22.4%	25.9%	1,511
Extreme weather	8.7%	6.9%	584
Security	0.0%	0.1%	0

6,743 delay minutes on 64 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 May 2025?

83.8% of 359 scheduled domestic departures left less than 15 minutes late, and 79.9% reached their destination on time. The national figures that month were 76.7% and 75.4%.

How does that compare with a year earlier?

In May 2024, 85.3% of 334 departures left on time and 0.6% were cancelled, against 83.8% and 0.8% in May 2025.

Provenance

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