Bismarck Municipal in April 2026

86.6%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 2026, reporting carriers scheduled 336 domestic departures from Bismarck Municipal (BIS). 86.6% left less than 15 minutes late and 78.3% reached their destination on time; 0.0% were cancelled.

Nationally that month, 79.1% of flights departed on time and 78.9% arrived on time, so BIS departures were 7.5 points above the national departure figure.

A year earlier, in April 2025, the airport had 347 departures with 79.3% leaving on time: a change of +7.3 points, with flights down 3%.

Flights arriving at BIS that month were on time 84.6% of the time (337 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 50%, late-arriving aircraft 25% and national aviation system 19%.

On time 78.3%
Arrived 15+ minutes late 21.4%
Cancelled 0.0%
Diverted 0.3%

Every scheduled departure from BIS in April 2026, judged by arrival at the destination.

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

Measure	Apr 2026	Apr 2025	BIS, 12 months to Jul 2026	All reported flights, Apr 2026
Departed on time	86.6%	79.3%	81.5%	79.1%
Arrived on time	78.3%	74.6%	79.5%	78.9%
Cancelled	0.0%	0.6%	0.7%	0.9%
Average departure delay (late minutes only)	15.7 min	25.8 min	18.7 min	14.5 min
Scheduled departures a day	11	12	11	19,931
Scheduled departures	336	347	3,874	597,919

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	183	54%	78.7%	5.7 min	0.0%
MQ Envoy Air	84	25%	78.6%	19.6 min	0.0%
G4 Allegiant Air	39	12%	66.7%	12.8 min	0.0%
DL Delta Air Lines	30	9%	90.0%	-12.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BIS–DEN	Bismarck/Mandan to Denver	119	70.6%	15.2 min	0.0%
BIS–MSP	Bismarck/Mandan to Minneapolis	94	92.6%	-12.1 min	0.0%
BIS–DFW	Bismarck/Mandan to Dallas/Fort Worth	60	78.3%	26.3 min	0.0%
BIS–AZA	Bismarck/Mandan to Phoenix	28	57.1%	21.1 min	0.0%
BIS–ORD	Bismarck/Mandan to Chicago	24	79.2%	2.8 min	0.0%
BIS–LAS	Bismarck/Mandan to Las Vegas	9	100.0%	-10.2 min	0.0%
BIS–SFB	Bismarck/Mandan to Sanford	2	50.0%	1.0 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 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2026	Minutes
Air carrier	49.6%	33.5%	3,137
Late-arriving aircraft	25.4%	40.4%	1,606
National Aviation System	18.8%	21.0%	1,190
Extreme weather	5.1%	5.0%	321
Security	1.1%	0.1%	71

6,325 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 BIS on time in April 2026?

86.6% of 336 scheduled domestic departures left less than 15 minutes late, and 78.3% reached their destination on time. The national figures that month were 79.1% and 78.9%.

How does that compare with a year earlier?

In April 2025, 79.3% of 347 departures left on time and 0.6% were cancelled, against 86.6% and 0.0% in April 2026.

Provenance

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