Historical on-time performance
St. Louis to Jacksonville
753 miData through May 2026Source: US DOT · BTS
Flights on STL–JAX arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 515 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time79%Medianon timep9035 minCancel0.2%Flights515
Why flights run late
Delay causes
- Airline29%
- Weather1%
- Air traffic (NAS)9%
- Late aircraft60%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather0%
- Air traffic (NAS)100%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). Shares are among 1 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly STL → JAX
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 88% on time.
- Mornings88% on time · p90 15 min · 511 flights
- Middays83% on time · p90 25 min · 345 flights
- Afternoons74% on time · p90 30 min · 120 flights · limited
- Evenings70% on time · p90 45 min · 220 flights
- Overnights65% on time · p90 55 min · 120 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 85% on time.
- Wednesdays85% on time · p90 20 min · 177 flights · limited
- Fridays85% on time · p90 20 min · 188 flights · limited
- Tuesdays84% on time · p90 25 min · 178 flights · limited
- Thursdays81% on time · p90 30 min · 186 flights · limited
- Mondays78% on time · p90 25 min · 189 flights · limited
- Saturdays78% on time · p90 45 min · 188 flights · limited
- Sundays72% on time · p90 40 min · 210 flights
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