FlightRecord

Jacksonville (JAX) to Chicago (MDW): On-Time Performance

Data through July 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 (93% vs 72%), which matters most in the rough months.

On-time
82%
arrived <15 min late
Avg delay
11 min
completed flights
Cancelled
1.4%
Flights/day
1.1
last 12 months
Duration
2h 28m
scheduled
Distance
848 mi

Monthly on-time trend

Monthly on-time percentage for JAX to MDW flights50%75%100%August 2024: 84% on-time (45 flights)84Aug 2024September 2024: 87% on-time (42 flights)87October 2024: 88% on-time (43 flights)88November 2024: 90% on-time (30 flights)90Nov 2024December 2024: 90% on-time (31 flights)90January 2025: 89% on-time (28 flights)89February 2025: 100% on-time (26 flights)100Feb 2025March 2025: 91% on-time (35 flights)91April 2025: 83% on-time (31 flights)83May 2025: 80% on-time (31 flights)80May 2025June 2025: 76% on-time (38 flights)76July 2025: 67% on-time (39 flights)67August 2025: 84% on-time (32 flights)84Aug 2025September 2025: 83% on-time (30 flights)83October 2025: 71% on-time (31 flights)71November 2025: 80% on-time (30 flights)80Nov 2025December 2025: 68% on-time (31 flights)68January 2026: 85% on-time (27 flights)85February 2026: 74% on-time (27 flights)74Feb 2026March 2026: 75% on-time (35 flights)75April 2026: 84% on-time (31 flights)84May 2026: 97% on-time (31 flights)97May 2026June 2026: 77% on-time (53 flights)77July 2026: 80% on-time (58 flights)80

Best time to fly from JAX to MDW

Aim for departures around 7 a.m. (93% on-time); avoid 6 p.m. departures (69%).

On-time percentage by scheduled departure hour, JAX to MDW5 a.m.: 100% on-time (27 flights)56 a.m.: 80% on-time (21 flights)67 a.m.: 93% on-time (182 flights)712 p.m.: 82% on-time (22 flights)121 p.m.: 92% on-time (25 flights)132 p.m.: 90% on-time (40 flights)143 p.m.: 78% on-time (82 flights)154 p.m.: 82% on-time (95 flights)165 p.m.: 73% on-time (211 flights)176 p.m.: 69% on-time (77 flights)187 p.m.: 75% on-time (63 flights)19scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday79%12 min
Tuesday84%11 min
Wednesday84%12 min
Thursday80%11 min
Friday81%12 min
Saturdaybest88%9 min
Sunday77%12 min

What causes delays on this route

Share of total delay minutes by cause, as reported by carriers to the US DOT.

  • Late-arriving aircraft59%
  • Airline operations22%
  • National airspace system13%
  • Weather6%

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 2024-07 and 2026-07. The average arrival delay across completed flights was 11 minutes.
What is the best time of day to fly from JAX to MDW?
Departures around 7 a.m. have the best record (93% on-time), while departures around 6 p.m. have the worst (69%). 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?
1.4% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, 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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Based on 888 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.