Bismarck Municipal in April 2025

79.3%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 April 2025, reporting carriers scheduled 347 domestic departures from Bismarck Municipal (BIS). 79.3% left less than 15 minutes late and 74.6% reached their destination on time; 0.6% were cancelled.

Nationally that month, 80.6% of flights departed on time and 79.5% arrived on time, so BIS departures were 1.3 points below the national departure figure.

A year earlier, in April 2024, the airport had 279 departures with 88.9% leaving on time: a change of −9.6 points, with flights up 24%.

Flights arriving at BIS that month were on time 78.3% of the time (346 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 42%, national aviation system 27% and extreme weather 24%.

On time 74.6%
Arrived 15+ minutes late 24.2%
Cancelled 0.6%
Diverted 0.6%

Every scheduled departure from BIS 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	BIS, 12 months to Jul 2026	All reported flights, Apr 2025
Departed on time	79.3%	88.9%	81.5%	80.6%
Arrived on time	74.6%	88.9%	79.5%	79.5%
Cancelled	0.6%	0.4%	0.7%	0.8%
Average departure delay (late minutes only)	25.8 min	8.6 min	18.7 min	14.1 min
Scheduled departures a day	12	9	11	19,465
Scheduled departures	347	279	3,874	583,950

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	200	58%	72.5%	23.6 min	0.0%
MQ Envoy Air	60	17%	61.7%	12.0 min	1.7%
G4 Allegiant Air	55	16%	90.9%	1.3 min	1.8%
DL Delta Air Lines	32	9%	84.4%	5.2 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BIS–DEN	Bismarck/Mandan to Denver	120	68.3%	25.9 min	0.0%
BIS–MSP	Bismarck/Mandan to Minneapolis	112	80.4%	15.9 min	0.0%
BIS–DFW	Bismarck/Mandan to Dallas/Fort Worth	60	61.7%	12.0 min	1.7%
BIS–AZA	Bismarck/Mandan to Phoenix	30	96.7%	18.0 min	0.0%
BIS–LAS	Bismarck/Mandan to Las Vegas	9	100.0%	-19.0 min	0.0%
BIS–PIE	Bismarck/Mandan to St. Petersburg	8	100.0%	-41.2 min	0.0%
BIS–SFB	Bismarck/Mandan to Sanford	8	50.0%	4.9 min	12.5%

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	42.2%	32.7%	4,017
Late-arriving aircraft	6.6%	39.4%	630
National Aviation System	27.4%	22.2%	2,610
Extreme weather	23.7%	5.5%	2,252
Security	0.1%	0.2%	6

9,515 delay minutes on 84 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 BIS on time in April 2025?

79.3% of 347 scheduled domestic departures left less than 15 minutes late, and 74.6% 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, 88.9% of 279 departures left on time and 0.4% were cancelled, against 79.3% and 0.6% 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 BIS · methodology · corrections.