Historical on-time performance
Miami to Birmingham
661 miData through May 2026Source: US DOT · BTS
Flights on MIA–BHM arrive on time 84% of the time over the last 12 months.
On-time rate84%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 673 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Envoy AirOn-time84%Medianon timep9025 minCancel0.9%Flights673
Why flights run late
Delay causes
- Airline28%
- Weather8%
- Air traffic (NAS)35%
- Late aircraft28%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline0%
- Weather33%
- Air traffic (NAS)67%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). Shares are among 6 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 MIA → BHM
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 92% on time.
- Mornings92% on time · p90 5 min · 138 flights · limited
- Overnights78% on time · p90 35 min · 1,060 flights
- Evenings70% on time · p90 55 min · 641 flights
- Afternoons66% on time · p90 70 min · 244 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 81% on time.
- Tuesdays81% on time · p90 35 min · 295 flights
- Wednesdays81% on time · p90 30 min · 293 flights
- Mondays79% on time · p90 40 min · 307 flights
- Saturdays74% on time · p90 40 min · 311 flights
- Thursdays72% on time · p90 45 min · 301 flights
- Fridays71% on time · p90 40 min · 305 flights
- Sundays70% on time · p90 50 min · 306 flights
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