How reliable is Bismarck Municipal Airport?
Flights from BIS departed within 15 minutes of schedule in 82% of 25,193 flights in official BTS history — and weather is calmest in May. Here’s the full picture before you book.
Reliability score
on-time, cancellations & delays
Weather favorability
year-round climate
Origin-airport operations
What the departure punctuality at BIS looks like
On-time departures
across 25,193 flights
Source: BTS Airport Operations · data through 2026-06-25. Role-specific BTS departure history; advisory context, not a guarantee for any flight.
Advertisement
Weather by month
When the weather works for you at Bismarck
A calm-weather score (0–100) for each month from decades of airport observations — how often conditions disrupt flying, not temperature. Higher is calmer.
Calmest month
Calmest flying weather of the year · 95/100 favorability
Roughest month
Most disruptive — low visibility & fog, snow · 80/100 favorability
The read on BIS
What the numbers say about flying through Bismarck Municipal Airport
Across official performance history, flights from Bismarck left within 15 minutes of schedule about 82% of the time over 25,193 flights. That's a solid, better-than-average operational record. Pair it with a moderate cancellation rate of 1.3%. When a departure does run late, the typical delay is around 14 minutes.
On weather, Bismarck is an unusually calm-weather airport year-round. May is the calmest stretch for flying, scoring 95 out of 100 for favorable conditions, while January is the most disruptive at 80, driven mainly by low visibility & fog and snow. The year is relatively steady, so no single month stands out as one to avoid on weather alone.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Bismarck, read how we weigh it all in how the PlaneSane Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about BIS
- How reliable is Bismarck Municipal Airport (BIS)?
- Flights from Bismarck left within 15 minutes of schedule roughly 82% of the time across 25,193 flights of official history — a solid, better-than-average operational record. The cancellation rate runs about 1.3%. It's advisory context, not a guarantee for any single flight.
- What is the best month to fly from BIS for good weather?
- May has the calmest flying weather at Bismarck Municipal Airport. January is the most disruptive, mainly from low visibility & fog and snow.
Planning a trip through Bismarck?
Score real flights to and from BIS on reliability, weather, and connection safety — not just price.