How reliable is Central Illinois Regional Airport at Bloomington-Normal?
Flights from BMI departed within 15 minutes of schedule in 85% of 15,842 flights in official BTS history — and weather is calmest in Jun. 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 BMI looks like
On-time departures
across 15,842 flights
Source: BTS Airport Operations · data through 2026-06-25. Role-specific BTS departure history; advisory context, not a guarantee for any flight.
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Weather by month
When the weather works for you at Bloomington
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 · 74/100 favorability
The read on BMI
What the numbers say about flying through Central Illinois Regional Airport at Bloomington-Normal
Across official performance history, flights from Bloomington left within 15 minutes of schedule about 85% of the time over 15,842 flights. That's one of the more dependable operational records you'll see. Pair it with a moderate cancellation rate of 1.8%. When a departure does run late, the typical delay is around 11 minutes.
On weather, Bloomington is an unusually calm-weather airport year-round. June is the calmest stretch for flying, scoring 95 out of 100 for favorable conditions, while January is the most disruptive at 74, driven mainly by low visibility & fog and snow. The seasonal swing is real but manageable; favor the calmer months when your dates are flexible.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Bloomington, 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 BMI
- How reliable is Central Illinois Regional Airport at Bloomington-Normal (BMI)?
- Flights from Bloomington left within 15 minutes of schedule roughly 85% of the time across 15,842 flights of official history — one of the more dependable operational records you'll see. The cancellation rate runs about 1.8%. It's advisory context, not a guarantee for any single flight.
- What is the best month to fly from BMI for good weather?
- June has the calmest flying weather at Central Illinois Regional Airport at Bloomington-Normal. January is the most disruptive, mainly from low visibility & fog and snow.
Planning a trip through Bloomington?
Score real flights to and from BMI on reliability, weather, and connection safety — not just price.