Historical on-time performance
Chicago to Jacksonville
849 miData through Dec 2025Source: US DOT · BTS
Flights on MDW–JAX arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 329 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time77%Medianon timep9035 minCancel0.6%Flights329
Why flights run late
Delay causes
- Airline28%
- Weather1%
- Air traffic (NAS)15%
- Late aircraft55%
- Security1%
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 MDW → JAX
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 88% on time.
- Mornings88% on time · p90 15 min · 139 flights · limited
- Middays81% on time · p90 25 min · 716 flights
- Afternoons79% on time · p90 40 min · 94 flights · limited
- Evenings69% on time · p90 80 min · 140 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 84% on time.
- Wednesdays84% on time · p90 25 min · 149 flights · limited
- Mondays83% on time · p90 25 min · 169 flights · limited
- Tuesdays82% on time · p90 40 min · 148 flights · limited
- Thursdays81% on time · p90 35 min · 165 flights · limited
- Sundays78% on time · p90 30 min · 156 flights · limited
- Saturdays76% on time · p90 30 min · 175 flights · limited
- Fridays72% on time · p90 35 min · 169 flights · limited
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