FlightRecord

Bismarck Municipal Airport (BIS): Delays & On-Time Performance

Data through May 2026

Bismarck Municipal Airport (BIS) is a tale of two seasons: departures ran 91% on-time in October 2024 but sank to 66% in December 2025. Across the year it averages 81% against a national 78%, over roughly 11 departures a day to 9 destinations.

Departures on-time
81%
left <15 min late
Avg dep delay
19 min
Arrivals on-time
80%
Cancelled
0.7%
Destinations
9
nonstop
Airlines
5

Monthly on-time trend

Monthly departure on-time percentage at BIS50%75%100%June 2024: 78% on-time (343 flights)78Jun 2024July 2024: 80% on-time (357 flights)80August 2024: 85% on-time (352 flights)85September 2024: 86% on-time (351 flights)86Sep 2024October 2024: 91% on-time (375 flights)91November 2024: 81% on-time (353 flights)81December 2024: 77% on-time (389 flights)77Dec 2024January 2025: 73% on-time (366 flights)73February 2025: 76% on-time (352 flights)76March 2025: 83% on-time (408 flights)83Mar 2025April 2025: 80% on-time (347 flights)80May 2025: 83% on-time (289 flights)83June 2025: 79% on-time (368 flights)79Jun 2025July 2025: 74% on-time (390 flights)74August 2025: 80% on-time (401 flights)80September 2025: 86% on-time (369 flights)86Sep 2025October 2025: 84% on-time (334 flights)84November 2025: 88% on-time (280 flights)88December 2025: 66% on-time (366 flights)66Dec 2025January 2026: 77% on-time (266 flights)77February 2026: 84% on-time (233 flights)84March 2026: 80% on-time (293 flights)80Mar 2026April 2026: 87% on-time (336 flights)87May 2026: 86% on-time (306 flights)86

Best time of day to depart from BIS

On-time percentage by scheduled departure hour at BIS5 a.m.: 87% on-time (865 flights)56 a.m.: 89% on-time (1,105 flights)67 a.m.: 89% on-time (522 flights)78 a.m.: 77% on-time (380 flights)89 a.m.: 80% on-time (428 flights)911 a.m.: 87% on-time (715 flights)1112 p.m.: 80% on-time (348 flights)121 p.m.: 82% on-time (1,149 flights)132 p.m.: 75% on-time (738 flights)143 p.m.: 77% on-time (304 flights)155 p.m.: 69% on-time (1,046 flights)177 p.m.: 69% on-time (117 flights)199 p.m.: 74% on-time (125 flights)21scheduled departure hour

Busiest routes from BIS

RouteFlights/12moOn-timeAvg delay
BIS → DEN1,53677%24 min
BIS → MSP1,02781%18 min
BIS → DFW72777%16 min
BIS → ORD27073%20 min
BIS → AZA25079%18 min
BIS → LAS11780%16 min

Most reliable routes

  1. BIS → MSP81%
  2. BIS → LAS80%
  3. BIS → AZA79%
  4. BIS → DFW77%
  5. BIS → DEN77%

Most delay-prone routes

  1. BIS → ORD73%
  2. BIS → DEN77%
  3. BIS → DFW77%
  4. BIS → AZA79%
  5. BIS → LAS80%

Airline performance at BIS

AirlineOn-time departuresAvg delayFlights
Delta Air Lines88%14 min943
Allegiant Air82%16 min968
Envoy Air81%14 min1,720
SkyWest Airlines79%22 min4,583

Frequently asked questions

How often are flights delayed at BIS?
19% of departures from Bismarck Municipal Airport left 15+ minutes late between 2024-06 and 2026-05, with an average departure delay of 19 minutes. The national on-time average over the same period was 78%.
What is the best time of day to depart from BIS?
Flights scheduled around 7 a.m. depart on time 89% of the time at BIS, versus 69% around 5 p.m.. Booking before noon is the usual rule of thumb here.
What is the worst month for delays at BIS?
In this dataset, December 2025 was the weakest month at BIS, with 66% of departures on time.
How often are flights cancelled at BIS?
0.7% of scheduled departures from BIS were cancelled in this period, compared with a national rate of 1.6%.

Popular route pages from this airport

Based on 8,224 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.