Historical on-time performance
Chicago to Jacksonville
849 miData through May 2026Source: US DOT · BTS
Flights on MDW–JAX arrive on time 73% of the time over the last 12 months.
On-time rate73%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.9%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-time73%Medianon timep9050 minCancel0.9%Flights328
Why flights run late
Delay causes
- Airline31%
- Weather4%
- Air traffic (NAS)11%
- Late aircraft53%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather33%
- Air traffic (NAS)67%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). Shares are among 3 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 MDW → JAX
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 — 88% on time.
- Mornings88% on time · p90 15 min · 135 flights · limited
- Middays82% on time · p90 25 min · 682 flights
- Evenings65% on time · p90 85 min · 215 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 83% on time.
- Tuesdays83% on time · p90 35 min · 156 flights · limited
- Wednesdays83% on time · p90 25 min · 157 flights · limited
- Mondays82% on time · p90 25 min · 177 flights · limited
- Saturdays79% on time · p90 35 min · 171 flights · limited
- Thursdays78% on time · p90 35 min · 175 flights · limited
- Sundays74% on time · p90 35 min · 158 flights · limited
- Fridays70% on time · p90 35 min · 179 flights · limited
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