According to PlainFlights' airport traffic ranking (BTS On-Time Performance total flights), Bloomington/Normal, IL (BMI) ranks #191 of 382 tracked US airports by total flights (most flights = #1). Bloomington/Normal, IL posts above-median on-time performance among the 382 tracked U.S. airports, as a mid-size U.S. airport.
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BMI on-time rate vs. the national average
Ahead of the U.S. average across all 382 tracked airports.
Volume vs. on-time rate
Where Bloomington/Normal, IL sits on volume vs. on-time rate
Among the 382 U.S. airports in the BTS corpus, Bloomington/Normal, IL handles more flight
volume than 50% of them, and has a higher on-time rate than
69% of them, placing it in the quadrant for busy and reliable.
Flight volume and on-time rate are independent figures: a busy airport can still run
reliably, and a quiet one can still run late.
Bloomington/Normal, IL vs. a 29-airport national peer sample, volume percentile vs. on-time-rate percentile.
Total flights (2020-2025): 25,097 ·
On-time rate: 85.2%
Delay Cause Breakdown
Top delay cause: Late Aircraft.
Total delay minutes169,387 min
Late Aircraft62,634 min · 37%
Carrier55,889 min · 33%
NAS (National Aviation System)26,903 min · 16%
Weather22,583 min · 13%
Security1,378 min · 1%
Source: U.S. DOT Bureau of Transportation Statistics, On-Time Performance
BMI - seasonal on-time pattern
Best: September (94.7%) · worst: July (90.5%)
BMI - on-time rate by year
2020–2025, year-over-year trend.
BMI - taxi-out and taxi-in (monthly)
Average taxi-out 15.7 min · taxi-in 5.1 min over the last 24 reported months (U.S. airport mean taxi-out ≈ 16.4 min).
BMI's average taxi-out (15.7 min) sits near the recent U.S. airport mean (~16.4 min). Month-to-month, it swings from 12.5 min (October 2024) to 21.6 min (January 2024).
Cancellation & Diversion Analysis
Flight disruption statistics for Bloomington/Normal, IL.
Cancellation Rate
1.18%
297 of 25,097 flights
Diversion Rate
0.11%
27 of 25,097 flights
Delay Rate
14.8%
3,721 of 25,097 flights
Top Routes from BMI
Busiest routes to and from Bloomington/Normal, IL.
Two PlainFlights-derived comparison paths for Bloomington/Normal, IL, both outside Illinois so the neighborhoods are not same-state geography. Axes stay disjoint: volume peers exclude the on-time peer set. Same-state compare stays below.
The standout signal at Bloomington/Normal, IL is the delay mix: Late Aircraft owns 37.0% of 169,387 delay minutes across 25,097 BTS flights. The on-time headline is 85.2% (6.2 pts above the 79% national average), with 3,721 delayed and 297 cancelled (1.18%).
Delay minutes concentrate in Late Aircraft (37.0% late-aircraft, 33.0% carrier, 15.9% NAS, 13.3% weather, 0.8% security). Mid-volume books still show a clear delay fingerprint rather than a weather-only story.
On the multi-year calendar, BMI is strongest in September (94.7% on-time) and weakest in July (90.5%), a 4.2-point swing. Volume peaks in July (~395 flights/month). The busiest connecting route is to DFW (Dallas/Fort Worth) at 80.7% on-time. Field definitions: on-time performance explained.
Bloomington/Normal, IL vs. the national on-time distribution
On-time rate among all 382 tracked U.S. airports
85.2%Top 31%higher than 69% of 382 airports
Bloomington/Normal, IL
60%95%
U.S. airports by on-time rate, bucketed by value
Each bar is a band; taller bars hold more airports. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data (2020–2025).
Statistics reflect cumulative performance across all available reporting periods. On-time rates exclude cancelled and diverted flights.
BMI's on-time book is stronger than most peers; the remaining risk sits in the delay mix, not a weak headline rate.
Check the busiest route from BMI before you book a connection. See top routes →
Travel in September rather than July if your dates are flexible. Seasonal patterns →
Gate-to-wheels taxi-out averages 15.7 min here; check the monthly series before a tight connection. Taxi times →
On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.
Frequently Asked Questions
What is Bloomington/Normal, IL's on-time rate?
Bloomington/Normal, IL (BMI) has a 85.2% on-time rate across 25,097 BTS-tracked flights (2020-2025), 6.2 pts above the 79% national flight-weighted average; that places it in roughly the above-median on-time performance.
How does BMI rank among U.S. airports by traffic volume?
Bloomington/Normal, IL ranks #191 of 382 tracked US airports by total BTS flights (most flights = #1), making it a mid-size U.S. airport.
What's the most common cause of delays at Bloomington/Normal, IL?
Late Aircraft is the leading delay cause at BMI, accounting for 37.0% of delay minutes. The full breakdown: 37.0% late-aircraft, 33.0% carrier, 15.9% NAS/air-traffic-control, 13.3% weather, and 0.8% security.
When is the best time to fly through Bloomington/Normal, IL?
September is historically BMI's strongest month at 94.7% on-time, while July is the weakest at 90.5%, a 4.2-point swing across the BTS historical record.