Billings Logan International in April 2025

85.8%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 April 2025, reporting carriers scheduled 359 domestic departures from Billings Logan International (BIL). 85.8% left less than 15 minutes late and 78.6% reached their destination on time; 0.8% were cancelled.

Nationally that month, 80.6% of flights departed on time and 79.5% arrived on time, so BIL departures were 5.2 points above the national departure figure.

A year earlier, in April 2024, the airport had 321 departures with 89.7% leaving on time: a change of −3.9 points, with flights up 12%.

Flights arriving at BIL that month were on time 79.3% of the time (358 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 51%, air carrier 25% and late-arriving aircraft 15%.

On time 78.6%
Arrived 15+ minutes late 20.1%
Cancelled 0.8%
Diverted 0.6%

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

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

Measure	Apr 2025	Apr 2024	BIL, 12 months to Jul 2026	All reported flights, Apr 2025
Departed on time	85.8%	89.7%	87.4%	80.6%
Arrived on time	78.6%	87.5%	84.7%	79.5%
Cancelled	0.8%	0.6%	0.6%	0.8%
Average departure delay (late minutes only)	11.9 min	7.4 min	11.8 min	14.1 min
Scheduled departures a day	12	11	13	19,465
Scheduled departures	359	321	4,642	583,950

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	150	42%	83.3%	-2.2 min	2.0%
MQ Envoy Air	64	18%	67.2%	12.3 min	0.0%
DL Delta Air Lines	60	17%	86.7%	-1.6 min	0.0%
UA United Airlines	60	17%	70.0%	13.5 min	0.0%
G4 Allegiant Air	25	7%	80.0%	10.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BIL–DEN	Billings to Denver	150	72.7%	9.1 min	2.0%
BIL–SLC	Billings to Salt Lake City	90	93.3%	-7.1 min	0.0%
BIL–DFW	Billings to Dallas/Fort Worth	61	68.9%	11.0 min	0.0%
BIL–MSP	Billings to Minneapolis	30	86.7%	-9.8 min	0.0%
BIL–AZA	Billings to Phoenix	17	76.5%	12.5 min	0.0%
BIL–LAS	Billings to Las Vegas	8	87.5%	7.0 min	0.0%
BIL–PHX	Billings to Phoenix	3	33.3%	39.0 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), April 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2025	Minutes
Air carrier	25.0%	32.7%	1,250
Late-arriving aircraft	15.4%	39.4%	773
National Aviation System	51.3%	22.2%	2,567
Extreme weather	8.3%	5.5%	416
Security	0.0%	0.2%	0

5,006 delay minutes on 72 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 April 2025?

85.8% of 359 scheduled domestic departures left less than 15 minutes late, and 78.6% reached their destination on time. The national figures that month were 80.6% and 79.5%.

How does that compare with a year earlier?

In April 2024, 89.7% of 321 departures left on time and 0.6% were cancelled, against 85.8% and 0.8% in April 2025.

Provenance

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