Airport · BHM · Birmingham, Alabama

Birmingham, AL

Birmingham, AL posts below-median on-time performance among the 382 tracked U.S. airports, as a high-volume U.S. airport. According to the U.S. DOT Bureau of Transportation Statistics, drawn from 178,467 flights (2020–2025); its biggest delay driver is late aircraft.

Compiled by PlainFlights Editorial, Flight Performance Editorial Team

Data updated 2026-06-13

81.5%
On-time: Top 73%
on-time, US airports: 74 min
Delay when late: 1.14%
Cancelled

Key Performance Metrics

Total Flights

178,467

Best Month

Nov 93.9%

Worst Month

Jul 88.5%

Delayed

33,077

Cancelled

2,031

60-65%

1
65-70%

4
70-75%

9
75-80%

48
80-85%

192
85-90%

116
90-95%

12

What this shows BHM is marked in the 80-85% band.

Delay Cause Breakdown

Top delay cause: Late Aircraft. Total delay minutes: 1,128,542.

Late Aircraft 43.9% (495,432 min)

Carrier 32.3% (364,248 min)

NAS (National Aviation System) 16.5% (186,409 min)

Weather 7.1% (80,589 min)

Security 0.2% (1,864 min)

Seasonal Performance Patterns

Monthly averages across all years of data. Best month: November (93.9% on-time). Most delays: July (88.5% on-time).

Month	Avg Flights	Avg Delayed	Avg Cancelled	On-Time %
December	2,448	465	18	91%
November	2,528	339	8	93.9%
October	2,697	379	9	93.7%
September	2,488	362	9	93.4%
August	2,553	510	22	91.1%
July	2,573	679	29	88.5%
June	2,421	635	26	88.5%
May	2,403	518	19	89.9%
April	2,440	397	75	92.7%
March	2,601	441	67	92.4%
February	2,226	376	22	92.4%
January	2,369	413	36	92.3%

Year-Over-Year Performance

Annual flight volume and on-time trends at BHM.

Year	Flights	Delayed	Cancelled	On-Time %
2025	33,716	3,194	326	90.5%
2024	34,469	3,065	209	91.1%
2023	31,857	2,695	172	91.5%
2022	27,610	2,692	352	90.2%
2021	27,361	2,234	208	91.8%
2020	23,454	1,003	764	95.7%

Cancellation & Diversion Analysis

Flight disruption statistics for Birmingham, AL.

Cancellation Rate

1.14%

2,031 of 178,467 flights

Diversion Rate

0.13%

238 of 178,467 flights

Delay Rate

18.5%

33,077 of 178,467 flights

Monthly Performance

Recent 24 months of flight data.

Period	Flights	Dep Delayed	Arr Delayed	Cancelled	Diverted
Dec 2025	2,709	304	349	18	1
Nov 2025	2,831	227	244	28	3
Oct 2025	3,081	230	280	4	2
Sep 2025	2,748	158	172	3	4
Aug 2025	2,952	271	321	13	11
Jul 2025	3,203	368	444	44	9
Jun 2025	3,095	384	501	48	8
May 2025	2,991	345	380	37	7
Apr 2025	2,841	281	331	16	0
Mar 2025	2,644	220	283	31	5
Feb 2025	2,231	211	264	19	2
Jan 2025	2,390	195	238	65	0
Dec 2024	2,915	302	304	7	4
Nov 2024	3,057	181	197	4	2
Oct 2024	3,245	165	183	7	3
Sep 2024	2,860	212	247	9	3
Aug 2024	2,857	249	335	24	6
Jul 2024	2,920	418	554	55	6
Jun 2024	2,918	306	414	11	3
May 2024	3,025	407	454	24	8
Apr 2024	2,859	217	255	9	5
Mar 2024	2,742	212	280	9	3
Feb 2024	2,455	145	184	4	0
Jan 2024	2,616	251	319	46	1

Top Routes from BHM

Busiest routes to and from Birmingham, AL.

Route	Flights	On-Time	Distance
ATL (Atlanta) → BHM (Birmingham)	16,520	86.4%	134 mi
BHM (Birmingham) → ATL (Atlanta)	16,512	90.7%	134 mi
CLT (Charlotte) → BHM (Birmingham)	11,809	81%	350 mi
BHM (Birmingham) → CLT (Charlotte)	11,795	83.8%	350 mi
DFW (Dallas/Fort Worth) → BHM (Birmingham)	11,643	76.1%	597 mi
BHM (Birmingham) → DFW (Dallas/Fort Worth)	11,634	77.9%	597 mi
DEN (Denver) → BHM (Birmingham)	5,972	72.4%	1,083 mi
BHM (Birmingham) → DEN (Denver)	5,958	81.3%	1,083 mi
BHM (Birmingham) → DAL (Dallas)	4,745	82.3%	587 mi
DAL (Dallas) → BHM (Birmingham)	4,742	74.7%	587 mi
DCA (Washington) → BHM (Birmingham)	4,679	76.9%	653 mi
BHM (Birmingham) → DCA (Washington)	4,677	81.6%	653 mi
BHM (Birmingham) → MCO (Orlando)	3,788	79.7%	479 mi
MCO (Orlando) → BHM (Birmingham)	3,751	77.3%	479 mi
BHM (Birmingham) → MIA (Miami)	3,706	82%	661 mi
MIA (Miami) → BHM (Birmingham)	3,704	77.5%	661 mi
BHM (Birmingham) → ORD (Chicago)	3,672	81.3%	584 mi
ORD (Chicago) → BHM (Birmingham)	3,664	81.3%	584 mi
BHM (Birmingham) → IAH (Houston)	2,905	83.1%	562 mi
IAH (Houston) → BHM (Birmingham)	2,876	83%	562 mi

Airports With a Similar On-Time Rate

Other U.S. airports nationwide whose on-time rate is closest to Birmingham, AL's 81.5%.

Syracuse, NY

81.5% on-time 131,663 flights

South Bend, IN

81.5% on-time 72,322 flights

Charlotte Amalie, VI

81.5% on-time 61,916 flights

Charleston/Dunbar, WV

81.5% on-time 36,162 flights

King Salmon, AK

81.5% on-time 3,450 flights

Houston, TX

81.6% on-time 1,404,392 flights

Other Airports in Alabama

Compare performance with other Alabama airports.

HSV 82.6%

Huntsville, AL

Huntsville · 91,787 flights

MOB 85.2%

Mobile, AL

Mobile · 33,438 flights

MGM 82.3%

Montgomery, AL

Montgomery · 30,016 flights

DHN 88.1%

Dothan, AL

Dothan · 8,886 flights

GUF 81.8%

Gulf Shores, AL

Gulf Shores · 654 flights

Keep exploring

More flight data around Birmingham, AL.

Alabama flight data

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

View AL data →

Airport rankings

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

Best on-time airports →

Compare airports

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

Open comparison tool →

What the Data Says About BHM

Birmingham, AL in Birmingham, Alabama handled 178,467 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 81.5% on-time departure rate. Of those flights, 33,077 experienced delays, 2,031 were cancelled, and 238 were diverted. The cancellation rate works out to 1.14%, the diversion rate to 0.13%, and the average delay when departures run late is 73.9 minutes. These figures are the baseline for comparing BHM against other airports in the same state and nationally.

Breaking down what drives delays at BHM, Late Aircraft leads the pack. Late Aircraft accounts for 43.9% of total delay minutes, followed by Carrier at 32.3% and NAS (National Aviation System) at 16.5%. Weather contributes 7.1% of delay minutes at this airport, while security holds the smallest share at 0.2%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.

Seasonally, November runs the cleanest at BHM with a 93.9% on-time rate, while July is the roughest at 88.5% - a 5-point swing between best and worst month. Volume peaks in October, when average flights hit 2,697. The busiest route connecting BHM is to ATL (Atlanta), with 16,520 flights at a 86.4% on-time rate. Combine these numbers - 81.5% on-time, 73.9-minute average delay, 1.14% cancellation rate, and you have a concrete picture of departure reliability at Birmingham, AL.

Frequently Asked Questions

What is the on-time performance rate at Birmingham, AL (BHM)? ▼

Birmingham, AL has an overall on-time departure rate of 81.5%. Out of 178,467 total flights tracked, 33,077 experienced delays and 2,031 were cancelled.

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

The top delay cause at Birmingham, AL is Late Aircraft. Late Aircraft accounts for 43.9% of all delay minutes.

What is the average delay time at BHM? ▼

The average delay at Birmingham, AL is 73.9 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 BHM? ▼

Based on historical data, November has the best on-time performance at BHM with 93.9% of flights departing on time.

What is the worst month for delays at BHM? ▼

July tends to have the most delays at BHM, with an on-time rate of only 88.5%.

How many routes operate from BHM? ▼

Birmingham, AL serves at least 20 routes. The busiest route is ATL to BHM (Atlanta - Birmingham) with 16,520 flights.

What is the cancellation rate at BHM? ▼

Birmingham, AL has a cancellation rate of 1.14%, based on 2,031 cancelled flights out of 178,467 total flights tracked.

Flight Guides

Data-driven guides to help you understand airport and flight performance.

Best & Worst Airlines for On-Time Performance

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Why Flights Get Cancelled

Cancellation causes broken down by data

How to Choose Reliable Flight Routes

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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 BHM's data

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

Check the busiest route from BHM before you book a connection. See top routes
Travel in November 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.