Billings Logan International in May 2026

89.3%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 383 domestic departures from Billings Logan International (BIL). 89.3% left less than 15 minutes late and 89.0% reached their destination on time; 0.0% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so BIL departures were 12.2 points above the national departure figure.

A year earlier, in May 2025, the airport had 384 departures with 81.0% leaving on time: a change of +8.3 points, with flights down 0%.

Flights arriving at BIL that month were on time 85.9% of the time (383 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 42%, late-arriving aircraft 35% and extreme weather 13%.

On time 89.0%
Arrived 15+ minutes late 10.2%
Cancelled 0.0%
Diverted 0.8%

Every scheduled departure from BIL 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	BIL, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	89.3%	81.0%	87.4%	77.1%
Arrived on time	89.0%	79.7%	84.7%	77.6%
Cancelled	0.0%	0.5%	0.6%	0.9%
Average departure delay (late minutes only)	10.1 min	19.9 min	11.8 min	16.0 min
Scheduled departures a day	13	13	13	20,391
Scheduled departures	383	384	4,642	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	163	43%	90.2%	-8.9 min	0.0%
MQ Envoy Air	73	19%	87.7%	-2.8 min	0.0%
DL Delta Air Lines	62	16%	95.2%	-10.0 min	0.0%
UA United Airlines	62	16%	88.7%	-0.7 min	0.0%
G4 Allegiant Air	23	6%	69.6%	45.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BIL–DEN	Billings to Denver	163	89.0%	-6.3 min	0.0%
BIL–SLC	Billings to Salt Lake City	93	94.6%	-9.6 min	0.0%
BIL–DFW	Billings to Dallas/Fort Worth	62	87.1%	-2.2 min	0.0%
BIL–MSP	Billings to Minneapolis	31	90.3%	-6.1 min	0.0%
BIL–AZA	Billings to Phoenix	14	57.1%	49.4 min	0.0%
BIL–ORD	Billings to Chicago	11	90.9%	-5.6 min	0.0%
BIL–LAS	Billings to Las Vegas	9	88.9%	38.4 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	41.8%	33.0%	1,519
Late-arriving aircraft	35.2%	40.4%	1,281
National Aviation System	10.5%	20.5%	383
Extreme weather	12.5%	6.0%	454
Security	0.0%	0.1%	0

3,637 delay minutes on 39 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 BIL on time in May 2026?

89.3% of 383 scheduled domestic departures left less than 15 minutes late, and 89.0% 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, 81.0% of 384 departures left on time and 0.5% were cancelled, against 89.3% and 0.0% 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 BIL · methodology · corrections.