STL to JAX flight delays & on-time performance
Nonstop flights from St. Louis Lambert International Airport to Jacksonville International Airport · 753 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at STL or JAX right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from St. Louis (STL) to Jacksonville (JAX) arrived on time 78% of the time in Aug 2025 – Jul 2026, in line with the national average.
- 0.2% were cancelled, and 5% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 7am did best (98% on time); around 5pm did worst (50%).
- Tuesday was the most reliable day to fly (89% on time) and Saturday the least (70%).
- The largest source of delay minutes was late-arriving aircraft (55%).
Which airline is most on time from STL to JAX?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Southwest Airlines | 78% | 0.2% | 13 min | 5.3% | 507 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am98%50 flights
- 8am86%102 flights
- 10am90%63 flights
- 1pm66%29 flights
- 3pm72%29 flights
- 5pm50%16 flights
- 6pm75%51 flights
- 7pm68%88 flights
- 8pm77%43 flights
- 9pm59%17 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday73%1.4% cancelled
- Tuesday89%0.0% cancelled
- Wednesday85%0.0% cancelled
- Thursday77%0.0% cancelled
- Friday85%0.0% cancelled
- Saturday70%0.0% cancelled
- Sunday73%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft55%
- Airline (crew, maintenance, cleaning, fueling)33%
- Air traffic control & airport congestion10%
- Security1%
- Extreme weather1%
Why flights are cancelled
Share of cancellations by reason.
- Air traffic control & airport congestion100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Extreme weather0%
- Security0%
STL to JAX: common questions
- How often are STL to JAX flights on time?
- 78% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from St. Louis to Jacksonville cancelled?
- 0.2% of scheduled flights were cancelled (1 of 507).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 55 min behind schedule on average, and 5.3% of flights were an hour or more late.
- How long is taxi time at STL?
- Flights on this route spent 11 min taxiing from the gate to takeoff on average.
Related routes
Return trip: JAX to STL — 88% on time
More flights from St. Louis
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: STL → JAX, nonstop flights by US airlines that report to the DOT. How we calculate this.