Historical on-time performance
Denver to Birmingham
1,083 miData through May 2026Source: US DOT · BTS
Flights on DEN–BHM arrive on time 73% of the time over the last 12 months.
On-time rate73%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights
based on 1,109 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesbestOn-time79%Medianon timep9040 minCancel0.3%Flights697
- United AirlinesOn-time74%Medianon timep9020 minCancel0.0%Flights31
- Southwest AirlinesOn-time61%Median5 minp9060 minCancel1.0%Flights381
Why flights run late
Delay causes
- Airline40%
- Weather4%
- Air traffic (NAS)16%
- Late aircraft40%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather67%
- Air traffic (NAS)33%
- Security0%
Most cancellations here are attributed to Weather. 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 DEN → 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 54% to 81% on time.
- Middays81% on time · p90 25 min · 1,076 flights
- Mornings77% on time · p90 45 min · 180 flights · limited
- Evenings67% on time · p90 55 min · 1,718 flights
- Afternoons57% on time · p90 70 min · 162 flights · limited
- Overnights54% on time · p90 90 min · 189 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 67% to 74% on time.
- Tuesdays74% on time · p90 50 min · 480 flights
- Sundays74% on time · p90 45 min · 482 flights
- Mondays72% on time · p90 50 min · 480 flights
- Wednesdays71% on time · p90 45 min · 478 flights
- Thursdays68% on time · p90 55 min · 479 flights
- Saturdays68% on time · p90 55 min · 443 flights
- Fridays67% on time · p90 45 min · 483 flights
Keep exploring