Bismarck Municipal (BIS) Delays and On-Time Departures
Bismarck/Mandan, ND · ranked 115th of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, Bismarck/Mandan (BIS) had 3,874 scheduled departures and 82.2% of them left on time (US average 77.4%).
That ranks 115th of 333 US airports tracked on this site, with 0.8% of departures cancelled.
Delta Air Lines was the most punctual airline here, with 87.2% of departures on time.
October has been the best month (88% on time) and Thursday the weakest day of the week (79%).
Best time of day to fly out of Bismarck/Mandan (BIS)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 87.0% | 1.2% | 859 |
| 6am–7am | 89.1% | 0.4% | 1,160 |
| 7am–8am | 89.0% | 0.2% | 473 |
| 8am–9am | 77.8% | 0.9% | 428 |
| 9am–10am | 80.8% | 0.2% | 428 |
| 10am–11am | 80.0% | 0.0% | 45 |
| 11am–12pm | 87.2% | 0.7% | 722 |
| 12pm–1pm | 81.8% | 0.3% | 375 |
| 1pm–2pm | 81.7% | 0.7% | 1,174 |
| 2pm–3pm | 75.1% | 0.8% | 756 |
| 3pm–4pm | 79.6% | 1.7% | 234 |
| 4pm–5pm | 87.2% | 4.1% | 49 |
| 5pm–6pm | 69.7% | 0.8% | 1,021 |
| 6pm–7pm | 69.3% | 0.7% | 138 |
| 7pm–8pm | 71.6% | 0.0% | 81 |
| 8pm–9pm | 82.5% | 0.0% | 80 |
| 9pm–10pm | 72.5% | 0.0% | 109 |
| 10pm–11pm | 71.6% | 1.2% | 82 |
Airlines at BIS ranked by on-time departures
Last 12 months. Airlines with fewer than 30 departures are marked “limited data”.
| Airline | On-time departures | On-time arrivals | Cancelled | Departures |
|---|---|---|---|---|
| Delta Air Lines | 87.2% | 84.2% | 0.3% | 375 |
| SkyWest Airlines | 82.2% | 81.1% | 0.7% | 2,127 |
| Envoy Air | 82.0% | 81.1% | 0.9% | 997 |
| Allegiant Air | 77.4% | 71.7% | 1.1% | 375 |
80%+ good 70–79.9% fair <70% poor
Best day to fly out of BIS
On-time departures by day, 24 months.
Best month to fly out of BIS
On-time departures by month, 24 months.
Holiday travel at Bismarck/Mandan (BIS)
On-time departures during holiday periods compared with all other days, last 24 months.
| Period | On-time departures | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 68.9% | -13.3 pts | 0.7% | 152 |
| Christmas & New Year (Dec 20 - Jan 3) | 72.7% | -9.4 pts | 0.8% | 377 |
| Summer peak (Jun 15 - Aug 15) | 81.1% | -1.0 pts | 0.4% | 1,504 |
| All other days | 82.2% | — | 0.8% | 6,181 |
Monthly on-time departure trend at BIS
On-time departure % each month, with the 12-month US average for reference.
Routes from Bismarck/Mandan (BIS)
Every route from BIS with its own page, by number of flights (last 12 months, on-time arrivals).
| To | On time | Cancelled | Flights |
|---|---|---|---|
| BIS → Denver (DEN) | 79.7% | 0.6% | 1,466 |
| BIS → Minneapolis (MSP) | 84.2% | 0.7% | 1,032 |
| BIS → Dallas/Fort Worth (DFW) | 82.0% | 1.1% | 727 |
| BIS → Chicago (ORD) | 78.6% | 0.4% | 274 |
| BIS → Phoenix (AZA) | 68.0% | 1.2% | 244 |