Airport · BMI · Bloomington/Normal, Illinois

Bloomington/Normal, IL

Bloomington/Normal, IL posts above-median on-time performance among the 382 tracked U.S. airports, as a mid-size U.S. airport. According to the U.S. DOT Bureau of Transportation Statistics, drawn from 25,097 flights (2020–2025); its biggest delay driver is late aircraft.

Compiled by PlainFlights Editorial, Flight Performance Editorial Team

Data updated 2026-06-13

85.2%
On-time: Top 31%
on-time, US airports: 88 min
Delay when late: 1.18%
Cancelled

Key Performance Metrics

Total Flights

25,097

Best Month

Sep 94.7%

Worst Month

Jul 90.5%

Delayed

3,721

Cancelled

297

60-65%

1
65-70%

4
70-75%

9
75-80%

48
80-85%

192
85-90%

116
90-95%

12

What this shows BMI is marked in the 85-90% band.

Delay Cause Breakdown

Top delay cause: Late Aircraft. Total delay minutes: 169,387.

Late Aircraft 37.0% (62,634 min)

Carrier 33.0% (55,889 min)

NAS (National Aviation System) 15.9% (26,903 min)

Weather 13.3% (22,583 min)

Security 0.8% (1,378 min)

Seasonal Performance Patterns

Monthly averages across all years of data. Best month: September (94.7% on-time). Most delays: July (90.5% on-time).

Month	Avg Flights	Avg Delayed	Avg Cancelled	On-Time %
December	364	58	3	92.2%
November	350	45	4	94.5%
October	348	43	1	94.3%
September	339	38	1	94.7%
August	383	63	3	92.4%
July	395	84	4	90.5%
June	337	58	2	92.5%
May	339	49	2	93.8%
April	306	38	9	94.1%
March	349	47	8	93.4%
February	317	43	7	92.7%
January	357	54	7	92.2%

Year-Over-Year Performance

Annual flight volume and on-time trends at BMI.

Year	Flights	Delayed	Cancelled	On-Time %
2025	3,445	269	30	92.2%
2024	3,500	257	27	92.7%
2023	3,564	257	14	92.8%
2022	5,281	418	74	92.1%
2021	5,314	343	45	93.5%
2020	3,993	196	107	95.1%

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

Monthly Performance

Recent 24 months of flight data.

Period	Flights	Dep Delayed	Arr Delayed	Cancelled	Diverted
Dec 2025	332	29	41	3	0
Nov 2025	326	20	25	14	0
Oct 2025	290	14	21	0	1
Sep 2025	313	18	21	1	0
Aug 2025	408	33	42	2	2
Jul 2025	408	51	68	2	2
Jun 2025	301	25	31	2	0
May 2025	338	24	32	0	1
Apr 2025	261	26	24	1	0
Mar 2025	160	10	13	1	0
Feb 2025	144	11	8	1	0
Jan 2025	164	8	10	3	0
Dec 2024	298	17	18	0	1
Nov 2024	270	18	13	1	1
Oct 2024	282	9	6	2	0
Sep 2024	276	8	9	1	0
Aug 2024	302	17	20	1	0
Jul 2024	324	37	46	5	1
Jun 2024	316	31	37	1	1
May 2024	316	36	40	2	1
Apr 2024	280	14	20	3	0
Mar 2024	284	22	23	0	0
Feb 2024	266	18	14	0	0
Jan 2024	286	30	32	11	1

Top Routes from BMI

Busiest routes to and from Bloomington/Normal, IL.

Route	Flights	On-Time	Distance
DFW (Dallas/Fort Worth) → BMI (Bloomington/Normal)	3,913	80.7%	690 mi
BMI (Bloomington/Normal) → DFW (Dallas/Fort Worth)	3,910	82.4%	690 mi
ATL (Atlanta) → BMI (Bloomington/Normal)	3,738	87.1%	533 mi
BMI (Bloomington/Normal) → ATL (Atlanta)	3,737	87.7%	533 mi
ORD (Chicago) → BMI (Bloomington/Normal)	2,194	84.8%	116 mi
BMI (Bloomington/Normal) → ORD (Chicago)	2,193	87.7%	116 mi

Airports With a Similar On-Time Rate

Other U.S. airports nationwide whose on-time rate is closest to Bloomington/Normal, IL's 85.2%.

Boise, ID

85.2% on-time 266,753 flights

Mobile, AL

85.2% on-time 33,438 flights

Duluth, MN

85.2% on-time 23,374 flights

Abilene, TX

85.2% on-time 21,805 flights

Manhattan/Ft. Riley, KS

85.2% on-time 15,042 flights

Juneau, AK

85.3% on-time 52,533 flights

Other Airports in Illinois

Compare performance with other Illinois airports.

ORD 81%

Chicago, IL

Chicago · 3,114,086 flights

MDW 78.4%

Chicago, IL

Chicago · 880,912 flights

MLI 83.4%

Moline, IL

Moline · 45,407 flights

PIA 80.7%

Peoria, IL

Peoria · 44,104 flights

CMI 84.8%

Champaign/Urbana, IL

Champaign/Urbana · 17,865 flights

BLV 76.4%

Belleville, IL

Belleville · 14,072 flights

RFD 78.9%

Rockford, IL

Rockford · 9,512 flights

DEC 84.5%

Decatur, IL

Decatur · 9,084 flights

Keep exploring

More flight data around Bloomington/Normal, IL.

Illinois flight data

Statewide on-time and delay aggregates, plus every reporting airport in Illinois.

View IL data →

Airport rankings

See where BMI sits among U.S. airports on on-time rate and average delay.

Best on-time airports →

Compare airports

Put BMI head-to-head with another airport on delays and reliability.

Open comparison tool →

What the Data Says About BMI

Bloomington/Normal, IL in Bloomington/Normal, Illinois handled 25,097 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 85.2% on-time departure rate. Of those flights, 3,721 experienced delays, 297 were cancelled, and 27 were diverted. The cancellation rate works out to 1.18%, the diversion rate to 0.11%, and the average delay when departures run late is 88.2 minutes. These figures are the baseline for comparing BMI against other airports in the same state and nationally.

Breaking down what drives delays at BMI, Late Aircraft leads the pack. Late Aircraft accounts for 37.0% of total delay minutes, followed by Carrier at 33.0% and NAS (National Aviation System) at 15.9%. Weather contributes 13.3% of delay minutes at this airport, while security holds the smallest share at 0.8%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.

Seasonally, September runs the cleanest at BMI with a 94.7% on-time rate, while July is the roughest at 90.5% - a 4-point swing between best and worst month. Volume peaks in July, when average flights hit 395. The busiest route connecting BMI is to DFW (Dallas/Fort Worth), with 3,913 flights at a 80.7% on-time rate. Combine these numbers - 85.2% on-time, 88.2-minute average delay, 1.18% cancellation rate, and you have a concrete picture of departure reliability at Bloomington/Normal, IL.

Frequently Asked Questions

What is the on-time performance rate at Bloomington/Normal, IL (BMI)? ▼

Bloomington/Normal, IL has an overall on-time departure rate of 85.2%. Out of 25,097 total flights tracked, 3,721 experienced delays and 297 were cancelled.

What is the most common cause of delays at BMI? ▼

The top delay cause at Bloomington/Normal, IL is Late Aircraft. Late Aircraft accounts for 37.0% of all delay minutes.

What is the average delay time at BMI? ▼

The average delay at Bloomington/Normal, IL is 88.2 minutes. This includes delays from carrier issues, weather, National Aviation System constraints, security, and late-arriving aircraft.

What is the best month to fly from BMI? ▼

Based on historical data, September has the best on-time performance at BMI with 94.7% of flights departing on time.

What is the worst month for delays at BMI? ▼

July tends to have the most delays at BMI, with an on-time rate of only 90.5%.

How many routes operate from BMI? ▼

Bloomington/Normal, IL serves at least 6 routes. The busiest route is DFW to BMI (Dallas/Fort Worth - Bloomington/Normal) with 3,913 flights.

What is the cancellation rate at BMI? ▼

Bloomington/Normal, IL has a cancellation rate of 1.18%, based on 297 cancelled flights out of 25,097 total flights tracked.

Flight Guides

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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.

Read our methodology - how this data is sourced, computed, and verified.

Using BMI's data

An airport-level on-time rate is a starting point, not a guarantee for your specific flight.

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
Scores vary by airline and route within the same airport; check the specific carrier you're flying. Browse airlines

On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.

All airports → | Rankings →

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights Editorial

Source: U.S. Bureau of Transportation Statistics (BTS) Airline on-time performance and operational reliability · 2025 Accessed 2026-07-23

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. Airport figures are computed directly from BTS On-Time Performance data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.