Billings Logan International in December 2025

87.1%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 December 2025, reporting carriers scheduled 364 domestic departures from Billings Logan International (BIL). 87.1% left less than 15 minutes late and 82.1% reached their destination on time; 1.6% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so BIL departures were 15.1 points above the national departure figure.

A year earlier, in December 2024, the airport had 373 departures with 88.7% leaving on time: a change of −1.6 points, with flights down 2%.

Flights arriving at BIL that month were on time 80.8% of the time (364 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 30%, late-arriving aircraft 26% and extreme weather 23%.

On time 82.1%
Arrived 15+ minutes late 16.2%
Cancelled 1.6%
Diverted 0.0%

Every scheduled departure from BIL in December 2025, judged by arrival at the destination.

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

Measure	Dec 2025	Dec 2024	BIL, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	87.1%	88.7%	87.4%	72.0%
Arrived on time	82.1%	88.2%	84.7%	71.9%
Cancelled	1.6%	0.0%	0.6%	1.5%
Average departure delay (late minutes only)	11.8 min	10.2 min	11.8 min	21.2 min
Scheduled departures a day	12	12	13	19,410
Scheduled departures	364	373	4,642	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	122	34%	79.5%	4.3 min	2.5%
MQ Envoy Air	75	21%	81.3%	-9.1 min	2.7%
DL Delta Air Lines	62	17%	83.9%	5.7 min	1.6%
UA United Airlines	62	17%	85.5%	0.7 min	0.0%
G4 Allegiant Air	43	12%	83.7%	-6.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BIL–DEN	Billings to Denver	125	79.2%	6.5 min	2.4%
BIL–SLC	Billings to Salt Lake City	90	84.4%	-2.2 min	0.0%
BIL–DFW	Billings to Dallas/Fort Worth	62	82.3%	-9.4 min	3.2%
BIL–MSP	Billings to Minneapolis	31	87.1%	10.2 min	3.2%
BIL–LAS	Billings to Las Vegas	22	90.9%	-12.3 min	0.0%
BIL–AZA	Billings to Phoenix	21	76.2%	0.5 min	0.0%
BIL–PHX	Billings to Phoenix	13	76.9%	-7.8 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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	29.9%	33.3%	1,357
Late-arriving aircraft	26.2%	41.1%	1,187
National Aviation System	21.1%	19.1%	959
Extreme weather	22.8%	6.4%	1,035
Security	0.0%	0.2%	0

4,538 delay minutes on 59 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 December 2025?

87.1% of 364 scheduled domestic departures left less than 15 minutes late, and 82.1% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 88.7% of 373 departures left on time and 0.0% were cancelled, against 87.1% and 1.6% in December 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for December 2025; 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.