Historical on-time performance
Jacksonville to Chicago
849 miData through Dec 2025Source: US DOT · BTS
Flights on JAX–MDW arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 328 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time78%Medianon timep9040 minCancel0.6%Flights328
Why flights run late
Delay causes
- Airline18%
- Weather2%
- Air traffic (NAS)13%
- Late aircraft67%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly JAX → MDW
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 70% to 91% on time.
- Mornings91% on time · p90 on time · 140 flights · limited
- Middays88% on time · p90 15 min · 388 flights
- Afternoons78% on time · p90 35 min · 329 flights
- Evenings70% on time · p90 50 min · 251 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 86% on time.
- Tuesdays86% on time · p90 20 min · 148 flights · limited
- Wednesdays86% on time · p90 25 min · 148 flights · limited
- Saturdays84% on time · p90 35 min · 175 flights · limited
- Thursdays81% on time · p90 25 min · 165 flights · limited
- Mondays78% on time · p90 35 min · 169 flights · limited
- Fridays78% on time · p90 35 min · 169 flights · limited
- Sundays74% on time · p90 35 min · 163 flights · limited
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