Historical on-time performance
Atlanta to Birmingham
134 miData through May 2026Source: US DOT · BTS
Flights on ATL–BHM arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.9%of scheduled flights
based on 3,266 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time81%Medianon timep9035 minCancel1.9%Flights3,266
Why flights run late
Delay causes
- Airline57%
- Weather5%
- Air traffic (NAS)11%
- Late aircraft26%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline70%
- Weather30%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 61 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ATL → BHM
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 77% to 88% on time.
- Mornings88% on time · p90 15 min · 1,407 flights
- Middays86% on time · p90 20 min · 1,875 flights
- Afternoons84% on time · p90 25 min · 1,612 flights
- Evenings77% on time · p90 40 min · 1,830 flights
- Overnights77% on time · p90 45 min · 2,362 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 86% on time.
- Wednesdays86% on time · p90 20 min · 1,238 flights
- Tuesdays85% on time · p90 25 min · 1,238 flights
- Thursdays84% on time · p90 30 min · 1,362 flights
- Saturdays82% on time · p90 25 min · 1,162 flights
- Mondays81% on time · p90 35 min · 1,358 flights
- Fridays80% on time · p90 35 min · 1,373 flights
- Sundays77% on time · p90 40 min · 1,355 flights
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