Historical on-time performance
Baltimore to Chicago
611 miData through May 2026Source: US DOT · BTS
Flights on BWI–MDW arrive on time 74% of the time over the last 12 months.
On-time rate74%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled2.0%of scheduled flights
based on 1,755 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time74%Medianon timep9045 minCancel2.0%Flights1,755
Why flights run late
Delay causes
- Airline29%
- Weather6%
- Air traffic (NAS)20%
- Late aircraft45%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline14%
- Weather77%
- Air traffic (NAS)9%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 35 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 BWI → 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 — 89% on time.
- Mornings89% on time · p90 15 min · 1,494 flights
- Middays83% on time · p90 20 min · 1,164 flights
- Afternoons70% on time · p90 50 min · 951 flights
- Evenings66% on time · p90 65 min · 1,249 flights
- Overnights55% on time · p90 75 min · 871 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 78% on time.
- Tuesdays78% on time · p90 35 min · 754 flights
- Thursdays77% on time · p90 40 min · 845 flights
- Wednesdays76% on time · p90 35 min · 799 flights
- Saturdays75% on time · p90 50 min · 669 flights
- Mondays74% on time · p90 45 min · 906 flights
- Fridays71% on time · p90 50 min · 915 flights
- Sundays71% on time · p90 50 min · 841 flights
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