Historical on-time performance
Birmingham to Chicago
570 miData through May 2026Source: US DOT · BTS
Flights on BHM–MDW arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled1.5%of scheduled flights
based on 482 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time82%Medianon timep9025 minCancel1.5%Flights482
Why flights run late
Delay causes
- Airline24%
- Weather0%
- Air traffic (NAS)22%
- Late aircraft54%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline29%
- Weather71%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 7 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 BHM → MDW
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 · 847 flights
- Middays85% on time · p90 20 min · 183 flights · limited
- Afternoons70% on time · p90 45 min · 510 flights
- Evenings67% on time · p90 60 min · 177 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 90% on time.
- Wednesdays90% on time · p90 10 min · 235 flights
- Tuesdays84% on time · p90 25 min · 237 flights
- Saturdays84% on time · p90 30 min · 162 flights · limited
- Thursdays84% on time · p90 30 min · 267 flights
- Mondays80% on time · p90 30 min · 271 flights
- Fridays79% on time · p90 25 min · 275 flights
- Sundays77% on time · p90 45 min · 270 flights
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