Idaho Falls Regional in May 2026

82.3%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 2026, reporting carriers scheduled 417 domestic departures from Idaho Falls Regional (IDA). 82.3% left less than 15 minutes late and 82.7% reached their destination on time; 0.5% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so IDA departures were 5.2 points above the national departure figure.

A year earlier, in May 2025, the airport had 359 departures with 83.8% leaving on time: a change of −1.5 points, with flights up 16%.

Flights arriving at IDA that month were on time 82.5% of the time (418 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 43%, air carrier 42% and national aviation system 9%.

On time 82.7%
Arrived 15+ minutes late 16.3%
Cancelled 0.5%
Diverted 0.5%

Every scheduled departure from IDA in May 2026, judged by arrival at the destination.

May 2026 against a year earlier, the airport's year and the nation

Measure	May 2026	May 2025	IDA, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	82.3%	83.8%	82.1%	77.1%
Arrived on time	82.7%	79.9%	80.5%	77.6%
Cancelled	0.5%	0.8%	0.7%	0.9%
Average departure delay (late minutes only)	19.9 min	18.2 min	21.1 min	16.0 min
Scheduled departures a day	14	12	13	20,391
Scheduled departures	417	359	4,724	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	322	77%	84.5%	3.2 min	0.6%
G4 Allegiant Air	33	8%	69.7%	49.3 min	0.0%
DL Delta Air Lines	31	7%	77.4%	41.3 min	0.0%
UA United Airlines	31	7%	83.9%	-6.6 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
IDA–DEN	Idaho Falls to Denver	134	85.1%	-6.2 min	0.0%
IDA–SLC	Idaho Falls to Salt Lake City	118	86.4%	6.9 min	0.0%
IDA–DFW	Idaho Falls to Dallas/Fort Worth	42	71.4%	19.8 min	4.8%
IDA–SEA	Idaho Falls to Seattle	38	86.8%	-3.6 min	0.0%
IDA–PDX	Idaho Falls to Portland	22	68.2%	7.4 min	0.0%
IDA–PHX	Idaho Falls to Phoenix	20	90.0%	68.5 min	0.0%
IDA–ORD	Idaho Falls to Chicago	13	84.6%	-3.0 min	0.0%
IDA–AZA	Idaho Falls to Phoenix	12	91.7%	0.5 min	0.0%
IDA–LAS	Idaho Falls to Las Vegas	9	55.6%	141.6 min	0.0%
IDA–SNA	Idaho Falls to Santa Ana	9	66.7%	34.8 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 2026.

Delay causes

BTS cause category	Share of delay minutes	National, May 2026	Minutes
Air carrier	42.2%	33.0%	3,301
Late-arriving aircraft	42.9%	40.4%	3,356
National Aviation System	8.5%	20.5%	667
Extreme weather	6.5%	6.0%	505
Security	0.0%	0.1%	0

7,829 delay minutes on 68 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 2026?

82.3% of 417 scheduled domestic departures left less than 15 minutes late, and 82.7% reached their destination on time. The national figures that month were 77.1% and 77.6%.

How does that compare with a year earlier?

In May 2025, 83.8% of 359 departures left on time and 0.8% were cancelled, against 82.3% and 0.5% in May 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2026; 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.