Historical on-time performance
Chicago to Birmingham
Flights on ORD–BHM arrive on time 79% of the time over the last 12 months.
based on 953 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.
- Republic AirwaysOn-time88%Medianon timep9015 minCancel0.0%Flights152
- Envoy AirOn-time78%Medianon timep9045 minCancel1.4%Flights762
- SkyWest AirlinesOn-time77%Medianon timep9025 minCancel5.1%Flights39
Why flights run late
Delay causes
- Airline12%
- Weather17%
- Air traffic (NAS)22%
- Late aircraft49%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather62%
- Air traffic (NAS)38%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 13 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 ORD → 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 73% to 84% on time.
- Mornings84% on time · p90 25 min · 706 flights
- Middays81% on time · p90 45 min · 384 flights
- Afternoons76% on time · p90 45 min · 610 flights
- Overnights75% on time · p90 50 min · 254 flights
- Evenings73% on time · p90 55 min · 292 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 82% on time.
- Tuesdays82% on time · p90 35 min · 260 flights
- Wednesdays80% on time · p90 35 min · 323 flights
- Thursdays80% on time · p90 35 min · 336 flights
- Mondays79% on time · p90 30 min · 341 flights
- Fridays78% on time · p90 40 min · 349 flights
- Sundays78% on time · p90 50 min · 352 flights
- Saturdays75% on time · p90 50 min · 285 flights
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