Airports › North Dakota
Airport · 12 months to July 2026
Bismarck Municipal: delays and on-time record
Bismarck/Mandan, North Dakota
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. Data through July 2026; this is a monthly history, not live airport status.
Reporting carriers scheduled 3,874 domestic departures from Bismarck Municipal (BIS), Bismarck/Mandan, in the 12 months to July 2026: about 11 a day to 7 destinations.
81.5% of those flights left the gate less than 15 minutes late, 5.4 points above the national departure figure of 76.1%. Flights arriving at BIS were on time 79.6% of the time, 3.6 points above the national arrival figure of 76.0%.
0.7% of scheduled departures were cancelled (national: 1.8%), and the average departure delay, counting early and on-time departures as zero, was 18.7 min.
SkyWest Airlines is the largest reporting carrier at BIS with 55% of departures. Among carriers with at least 120 departures, Delta Air Lines had the highest on-time arrival share for its BIS departures (84.0%) and Allegiant Air the lowest (70.9%).
On-time departures are up 1.5 points on the previous 12 months (80.0%).
Of the delay minutes that carriers assigned to a BTS cause category for flights leaving BIS, air carrier 50%, late-arriving aircraft 22% and national aviation system 18%.
- On time 79.5%
- Arrived 15+ minutes late 19.3%
- Cancelled 0.7%
- Diverted 0.5%
As origin and as destination, against the nation
| Measure | Departures from BIS | Arrivals at BIS | All reported flights | BIS departures, previous 12 months |
|---|---|---|---|---|
| Departed on time (less than 15 min late) | 81.5% | 80.3% | 76.1% | 80.0% |
| Arrived on time | 79.5% | 79.6% | 76.0% | 77.7% |
| Cancelled | 0.7% | 0.7% | 1.8% | 0.6% |
| Diverted | 0.5% | 0.2% | 0.3% | 0.6% |
| Average departure delay (late minutes only) | 18.7 min | 14.9 min | 17.4 min | 18.7 min |
| Arrival delay minutes per 100 flights | 1,898 | 1,515 | 1,684 | 1,871 |
| Scheduled flights | 3,874 | 3,873 | 7,043,858 | 4,340 |
12 months to July 2026. The first column follows flights that left BIS; the second follows flights that landed there. Year on year, on-time departures moved +1.5 pts.
Airlines at BIS
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| OO SkyWest Airlines | 2,127 | 55% | 80.2% | 7.2 min | 0.7% |
| MQ Envoy Air | 997 | 26% | 79.6% | 4.0 min | 0.9% |
| DL Delta Air Lines | 375 | 10% | 84.0% | 1.7 min | 0.3% |
| G4 Allegiant Air | 375 | 10% | 70.9% | 12.8 min | 1.1% |
Departures from BIS by reporting carrier, ordered by flights; on time means the flight reached its destination less than 15 minutes late. Green is at or above the airport's overall share of 79.5%. Carriers fly different routes at different hours, so the rows are not a like-for-like test.
Busiest routes from BIS
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| BIS–DEN | Bismarck/Mandan to Denver | 1,466 | 78.7% | 9.9 min | 0.6% |
| BIS–MSP | Bismarck/Mandan to Minneapolis | 1,032 | 83.6% | 1.5 min | 0.7% |
| BIS–DFW | Bismarck/Mandan to Dallas/Fort Worth | 727 | 80.3% | 2.5 min | 1.1% |
| BIS–ORD | Bismarck/Mandan to Chicago | 274 | 77.7% | 8.0 min | 0.4% |
| BIS–AZA | Bismarck/Mandan to Phoenix | 244 | 67.2% | 17.0 min | 1.2% |
| BIS–LAS | Bismarck/Mandan to Las Vegas | 116 | 81.0% | 4.1 min | 0.9% |
| BIS–SFB | Bismarck/Mandan to Sanford | 15 | 53.3% | 12.5 min | 0.0% |
Routes with at least 10 flights a month have their own page.
Month by month
By scheduled departure hour
Among hours with at least 77 departures, 6 am to 7 am had the highest on-time share (89.7% of 593 flights) and 6 pm to 7 pm the lowest (68.5% of 111).
Delay causes
Cancellations by reported reason (29 in the period): air carrier 10%, weather 69%, national aviation system 21%, security 0%.
Checkpoint volumes
TSA publishes daily checkpoint passenger counts for the country as a whole, not for BIS on its own. The national series through September 2026 is on the checkpoint volumes page.
Questions and answers
How often do flights leave BIS on time?
81.5% of the 3,874 scheduled domestic departures in the 12 months to July 2026 left less than 15 minutes late; the national figure was 76.1%. 0.7% were cancelled.
How often do flights arrive at BIS on time?
79.6% of 3,873 scheduled arrivals were on time by the BTS definition, against 76.0% nationally.
Which airline has the highest on-time share at BIS?
Counting departures from BIS and whether they reached their destination on time, Delta Air Lines had the highest share (84.0% of 375 flights), then SkyWest Airlines (80.2%) and Envoy Air (79.6%). Carriers fly different routes at different hours, so the figures are not a like-for-like test.
What causes delays at BIS?
For departures from BIS that reached their destination 15 or more minutes late, carriers attributed the delay minutes as follows: air carrier 50%, late-arriving aircraft 22%, national aviation system 18%, extreme weather 9%, security 1%.
What time of day has the highest on-time share at BIS?
Departures scheduled from 6 am to 7 am local time left on time 89.7% of the time, the highest of any hour with enough flights to compare; 6 pm to 7 pm was lowest at 68.5%.
Is it getting better?
On-time departures for the 12 months to July 2026 were 81.5%, up 1.5 points on the previous 12 months (80.0%). The monthly chart shows each of the last 36 months, and each month has its own page.
Does this page show today's delays at BIS?
No. BTS publishes on-time records about two months after the month ends, so this page is a monthly history through July 2026. For live conditions use the FAA airport status service or your airline.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987 to present), monthly files August 2023 to July 2026; airport name from the BTS airport lookup table. US government works in the public domain. Domestic scheduled flights by reporting carriers only: international flights, charters and smaller carriers are not in the source. Totals and averages only; no individual flight or aircraft is identified. See the methodology; report processing errors through corrections.