Historical on-time performance
Baltimore to Birmingham
682 miData through Dec 2025Source: US DOT · BTS
Flights on BWI–BHM arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled1.5%of scheduled flights
based on 131 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time79%Medianon timep9030 minCancel1.5%Flights131
Why flights run late
Delay causes
- Airline23%
- Weather20%
- Air traffic (NAS)31%
- Late aircraft26%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly BWI → BHM
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 65% to 86% on time.
- Mornings86% on time · p90 20 min · 352 flights
- Middays84% on time · p90 20 min · 363 flights
- Afternoons65% on time · p90 55 min · 275 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 69% to 85% on time.
- Tuesdays85% on time · p90 25 min · 157 flights · limited
- Wednesdays83% on time · p90 25 min · 157 flights · limited
- Thursdays80% on time · p90 25 min · 156 flights · limited
- Sundays77% on time · p90 25 min · 160 flights · limited
- Fridays75% on time · p90 35 min · 156 flights · limited
- Mondays75% on time · p90 30 min · 157 flights · limited
- Saturdays69% on time · p90 45 min · 70 flights · limited
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