FlightRecord

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

Data through May 2026

The calendar drives reliability on STL–JAX. October 2024 flights landed on schedule 97% of the time, but March 2026 dropped to 72% — a gap of 25 points. Across the full period the route averages 80% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 68%), which matters most in the rough months.

On-time
80%
arrived <15 min late
Avg delay
11 min
completed flights
Cancelled
0.4%
Flights/day
1.5
last 12 months
Duration
1h 58m
scheduled
Distance
753 mi

Monthly on-time trend

Monthly on-time percentage for STL to JAX flights50%75%100%June 2024: 79% on-time (34 flights)79Jun 2024July 2024: 74% on-time (35 flights)74August 2024: 82% on-time (35 flights)82September 2024: 85% on-time (34 flights)85Sep 2024October 2024: 97% on-time (35 flights)97November 2024: 85% on-time (27 flights)85December 2024: 90% on-time (29 flights)90Dec 2024January 2025: 73% on-time (11 flights)73February 2025: 82% on-time (17 flights)82March 2025: 88% on-time (33 flights)88Mar 2025April 2025: 80% on-time (50 flights)80May 2025: 75% on-time (57 flights)75June 2025: 77% on-time (60 flights)77Jun 2025July 2025: 74% on-time (62 flights)74August 2025: 83% on-time (57 flights)83September 2025: 80% on-time (56 flights)80Sep 2025October 2025: 75% on-time (57 flights)75November 2025: 87% on-time (54 flights)87December 2025: 83% on-time (58 flights)83Dec 2025January 2026: 67% on-time (18 flights)67February 2026: 90% on-time (19 flights)90March 2026: 72% on-time (33 flights)72Mar 2026April 2026: 78% on-time (37 flights)78May 2026: 76% on-time (41 flights)76

Best time to fly from STL to JAX

Aim for departures around 7 a.m. (95% on-time); avoid 8 p.m. departures (66%).

On-time percentage by scheduled departure hour, STL to JAX7 a.m.: 95% on-time (99 flights)78 a.m.: 87% on-time (175 flights)89 a.m.: 85% on-time (67 flights)910 a.m.: 90% on-time (80 flights)1011 a.m.: 81% on-time (32 flights)111 p.m.: 75% on-time (71 flights)132 p.m.: 91% on-time (43 flights)143 p.m.: 74% on-time (31 flights)155 p.m.: 62% on-time (21 flights)176 p.m.: 75% on-time (44 flights)187 p.m.: 70% on-time (144 flights)198 p.m.: 66% on-time (98 flights)209 p.m.: 59% on-time (22 flights)21scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday77%13 min
Tuesday83%9 min
Wednesdaybest86%9 min
Thursday81%10 min
Friday83%11 min
Saturday81%14 min
Sunday74%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 aircraft47%
  • Airline operations36%
  • National airspace system15%
  • Weather1%

Frequently asked questions

How often are flights from STL to JAX delayed?
20% of STL–JAX 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 11 minutes.
What is the best time of day to fly from STL to JAX?
Departures around 7 a.m. have the best record (95% on-time), while departures around 8 p.m. have the worst (66%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
How long is the flight from STL to JAX?
The scheduled STL–JAX flight time averages 1h 58m over 753 miles. Actual arrival times vary — flights on this route land 15+ minutes late 20% of the time.
How often are STL to JAX flights cancelled?
0.4% 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 STL to JAX?
March 2026 was the roughest month in this dataset, with only 72% of arrivals on time. The best was October 2024 at 97%. If your dates are flexible, that 25-point gap is worth planning around.

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Based on 949 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.