Route Reliability

Route reliability

Atlanta (ATL) to Birmingham (BHM): which airline is most on time?

On-time arrivals, cancellations and long delays for every airline that reported nonstop flights from Atlanta, GA (ATL) to Birmingham, AL (BHM), September 2025 to August 2026.

Historical performance Official DOT data through August 2026 · Not live flight status

Atlanta, GABirmingham, AL

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Three-letter airport codes, nonstop U.S. domestic flights. One direction at a time.

Route at a glance · September 2025 to August 2026

ATL to BHM

Atlanta, GA to Birmingham, AL

On time
81.7%vs 75.6% U.S. average Better than average
Cancelled
1.7%vs 1.9% U.S. average About average
60+ min late
5.5%vs 8.1% U.S. average Better than average
Scheduled flights
3,371in 12 months1 airline
Only rated airline
Delta Air Lines81.7% on time · 3,371 flights

On time more often than the U.S. average, with a typical cancellation rate.

Compared with all U.S. flights, September 2025 to August 2026. “About average” means within 1.5 points for on time, 0.3 for cancelled and 1 for 60+ minutes late.

Airlines on this route

Ranked by on-time arrival

Airlines from ATL to BHM, September 2025 to August 2026. Rates are shares of all scheduled flights.
Airline On time Cancelled 60+ min late Avg delay when late Diverted Flights
1. Delta Air Lines 81.7% 1.7% 5.5% 64 min 0.1% 3,371

On time = arrived within 15 minutes of schedule. Avg delay when late = average arrival delay of flights 15+ minutes late. "Most reliable" needs at least 300 flights in 12 months. Tap a heading to sort.

What this means

How ATL to BHM compares.

  • Delta Air Lines was the only airline with enough flights on this route to rate (3,371 flights). 81.7% of them arrived within 15 minutes of schedule.
  • 1.7% of flights on this route were cancelled (about 1 in 59), about the same as the U.S. average of 1.9%.
  • 5.5% of flights, about 1 in 18, arrived an hour or more late. When a flight was late (15+ minutes), the average arrival delay was 64 min.
  • Overall, 81.7% of flights on this route arrived on time, 6.1 points higher than the U.S. average of 75.6%.
  • Over the last 3 years, October was the most reliable month on this route (92.0% on time) and July the least reliable (67.3%).
  • Cancellations peaked in July, when 3.2% of flights were cancelled.
  • Flights scheduled to depart 9 am to 10 am were the most punctual (91.1% on time); flights scheduled to depart 5 pm to 6 pm were the least (68.5%).
  • In the other direction, Birmingham (BHM) to Atlanta (ATL), 85.5% of flights were on time and 1.7% were cancelled. Compare airlines BHM to ATL.

Best and worst months to fly ATL to BHM

Jan 79.1%
Feb 86.9%
Mar 82.1%
Apr 84.6%
May 78.3%
Jun 77.7%
Jul 67.3%
Aug 80.8%
Sep 90.0%
Oct 92.0%
Nov 89.5%
Dec 85.1%
Share of scheduled flights on time 12-month average 81.7%
All airlines combined, by calendar month, September 2023 to August 2026 (3 years pooled). Scale starts at zero.
Show as table
PeriodOn timeFlights
January 79.1% 690
February 86.9% 658
March 82.1% 797
April 84.6% 807
May 78.3% 838
June 77.7% 825
July 67.3% 851
August 80.8% 795
September 90.0% 740
October 92.0% 764
November 89.5% 708
December 85.1% 765

Month by month, last 12 months

Sep 91.9%
Oct 89.5%
Nov 84.7%
Dec 77.2%
Jan 74.2%
Feb 87.9%
Mar 80.8%
Apr 86.7%
May 77.3%
Jun 83.6%
Jul 70.9%
Aug 77.7%
Share of scheduled flights on time U.S. average 75.6%
All airlines combined, September 2025 to August 2026. Scale starts at zero.
Show as table
PeriodOn timeFlights
Sep 2025 91.9% 260
Oct 2025 89.5% 285
Nov 2025 84.7% 262
Dec 2025 77.2% 276
Jan 2026 74.2% 244
Feb 2026 87.9% 232
Mar 2026 80.8% 286
Apr 2026 86.7% 300
May 2026 77.3% 317
Jun 2026 83.6% 305
Jul 2026 70.9% 313
Aug 2026 77.7% 291

Best and worst departure times

8a 90.8%
9a 91.1%
10a 86.6%
11a 89.4%
12p 89.2%
1p 79.9%
2p 81.0%
3p 78.7%
4p 78.8%
5p 68.5%
6p 75.5%
7p 81.5%
8p 80.3%
9p 75.7%
10p 85.9%
11p 76.1%
Share of scheduled flights on time
By scheduled local departure hour at ATL, September 2025 to August 2026. Hours with no scheduled flights are omitted. Scale starts at zero.
Show as table
PeriodOn timeFlights
Departing 8 am to 9 am 90.8% 357
Departing 9 am to 10 am 91.1% 124
Departing 10 am to 11 am 86.6% 217
Departing 11 am to noon 89.4% 161
Departing noon to 1 pm 89.2% 194
Departing 1 pm to 2 pm 79.9% 239
Departing 2 pm to 3 pm 81.0% 137
Departing 3 pm to 4 pm 78.7% 244
Departing 4 pm to 5 pm 78.8% 293
Departing 5 pm to 6 pm 68.5% 213
Departing 6 pm to 7 pm 75.5% 249
Departing 7 pm to 8 pm 81.5% 173
Departing 8 pm to 9 pm 80.3% 233
Departing 9 pm to 10 pm 75.7% 173
Departing 10 pm to 11 pm 85.9% 163
Departing 11 pm to midnight 76.1% 201
Woman at an airport window watching a plane take off
Photo: Depositphotos (licensed stock, illustrative only). Credits

Sources & data dates

Source
U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
Period
September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
Data through
August 2026
Processed
2026-11-03
Scope
Nonstop scheduled flights from Atlanta, GA (ATL) to Birmingham, AL (BHM), one direction. Airlines that report to the DOT only.
Method
Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.

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