FlightRecord

Jacksonville (JAX) to St. Louis (STL): On-Time Performance

Data through May 2026

When you fly JAX to STL matters as much as anything else about the booking: the route swung from 95% on-time in September 2025 to just 63% in July 2024. Across the full period the route averages 86% on-time against a national 78%. Morning departures also hold up better than evening ones (96% vs 77%), which matters most in the rough months.

On-time
86%
arrived <15 min late
Avg delay
12 min
completed flights
Cancelled
0.5%
Flights/day
1.5
last 12 months
Duration
2h 14m
scheduled
Distance
753 mi

Monthly on-time trend

Monthly on-time percentage for JAX to STL flights50%75%100%June 2024: 68% on-time (34 flights)68Jun 2024July 2024: 63% on-time (35 flights)63August 2024: 88% on-time (35 flights)88September 2024: 88% on-time (34 flights)88Sep 2024October 2024: 89% on-time (35 flights)89November 2024: 93% on-time (27 flights)93December 2024: 86% on-time (29 flights)86Dec 2024January 2025: 80% on-time (11 flights)80February 2025: 88% on-time (17 flights)88March 2025: 88% on-time (33 flights)88Mar 2025April 2025: 92% on-time (51 flights)92May 2025: 84% on-time (57 flights)84June 2025: 80% on-time (60 flights)80Jun 2025July 2025: 77% on-time (62 flights)77August 2025: 83% on-time (57 flights)83September 2025: 95% on-time (56 flights)95Sep 2025October 2025: 91% on-time (57 flights)91November 2025: 94% on-time (54 flights)94December 2025: 88% on-time (58 flights)88Dec 2025January 2026: 89% on-time (18 flights)89February 2026: 100% on-time (19 flights)100March 2026: 90% on-time (33 flights)90Mar 2026April 2026: 89% on-time (37 flights)89May 2026: 93% on-time (41 flights)93

Best time to fly from JAX to STL

Aim for departures around 7 a.m. (98% on-time); avoid 4 p.m. departures (51%).

On-time percentage by scheduled departure hour, JAX to STL6 a.m.: 94% on-time (67 flights)67 a.m.: 98% on-time (125 flights)78 a.m.: 97% on-time (155 flights)811 a.m.: 93% on-time (76 flights)1112 p.m.: 90% on-time (80 flights)121 p.m.: 89% on-time (53 flights)133 p.m.: 83% on-time (23 flights)154 p.m.: 51% on-time (41 flights)165 p.m.: 93% on-time (45 flights)176 p.m.: 92% on-time (83 flights)187 p.m.: 66% on-time (112 flights)198 p.m.: 68% on-time (75 flights)20scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday84%16 min
Tuesday91%9 min
Wednesdaybest91%7 min
Thursday87%10 min
Friday84%16 min
Saturday90%9 min
Sunday80%13 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 operations25%
  • National airspace system10%
  • Weather5%

Frequently asked questions

How often are flights from JAX to STL delayed?
14% of JAX–STL 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 STL?
Departures around 7 a.m. have the best record (98% on-time), while departures around 4 p.m. have the worst (51%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
How long is the flight from JAX to STL?
The scheduled JAX–STL flight time averages 2h 14m over 753 miles. Actual arrival times vary — flights on this route land 15+ minutes late 14% of the time.
How often are JAX to STL flights cancelled?
0.5% 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 STL?
July 2024 was the roughest month in this dataset, with only 63% of arrivals on time. The best was September 2025 at 95%. If your dates are flexible, that 32-point gap is worth planning around.

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Based on 950 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.