Historical on-time performance
Jacksonville to St. Louis
753 miData through Dec 2025Source: US DOT · BTS
Flights on JAX–STL arrive on time 87% of the time over the last 12 months.
On-time rate87%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 545 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time87%Medianon timep9020 minCancel0.2%Flights545
Why flights run late
Delay causes
- Airline26%
- Weather3%
- Air traffic (NAS)10%
- Late aircraft62%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly JAX → STL
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 97% on time.
- Mornings97% on time · p90 on time · 268 flights
- Middays84% on time · p90 25 min · 440 flights
- Evenings76% on time · p90 40 min · 280 flights
- Overnights68% on time · p90 90 min · 72 flights · limited
- Afternoons66% on time · p90 70 min · 146 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 87% on time.
- Tuesdays87% on time · p90 25 min · 167 flights · limited
- Wednesdays85% on time · p90 30 min · 166 flights · limited
- Mondays82% on time · p90 30 min · 171 flights · limited
- Thursdays81% on time · p90 35 min · 166 flights · limited
- Fridays80% on time · p90 50 min · 168 flights · limited
- Saturdays79% on time · p90 30 min · 165 flights · limited
- Sundays79% on time · p90 30 min · 203 flights
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