Jacksonville (JAX) to Chicago (MDW): On-Time Performance
Data through May 2026
The calendar drives reliability on JAX–MDW. February 2025 flights landed on schedule 100% of the time, but July 2025 dropped to 67% — a gap of 33 points. Across the full period the route averages 82% on-time against a national 78%. Morning departures also hold up better than evening ones (92% vs 74%), which matters most in the rough months.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 1.0
- last 12 months
- Duration
- 2h 28m
- scheduled
- Distance
- 848 mi
Monthly on-time trend
Best time to fly from JAX to MDW
Aim for departures around 7 a.m. (92% on-time); avoid 7 p.m. departures (68%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 13 min |
| Tuesday | 84% | 12 min |
| Wednesday | 84% | 11 min |
| Thursday | 78% | 12 min |
| Friday | 80% | 13 min |
| Saturdaybest | 88% | 9 min |
| Sunday | 79% | 10 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft60%
- Airline operations20%
- National airspace system16%
- Weather5%
Frequently asked questions
- How often are flights from JAX to MDW delayed?
- 19% of JAX–MDW flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 12 minutes.
- What is the best time of day to fly from JAX to MDW?
- Departures around 7 a.m. have the best record (92% on-time), while departures around 7 p.m. have the worst (68%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from JAX to MDW?
- The scheduled JAX–MDW flight time averages 2h 28m over 848 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are JAX to MDW flights cancelled?
- 1.1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from JAX to MDW?
- July 2025 was the roughest month in this dataset, with only 67% of arrivals on time. The best was February 2025 at 100%. If your dates are flexible, that 33-point gap is worth planning around.
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Related guides
Based on 826 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.