St Louis (STL) to Jacksonville (JAX) flights
Southwest Airlines flies nonstop from St. Louis Lambert International Airport to Jacksonville International Airport, with about 9 flights a week in July 2026. The 753-mile flight takes about 1h 53m gate to gate.
- Distance
- 753 mi · 1,212 km
- Flight time
- 1h 53m
- Airlines
- 1
- Seats filled
- 68%
Airlines flying STL to JAX
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 9 | Boeing 737-700 / MAX 7, Boeing 737 MAX 8, Boeing 737-800 | 55,455 | 1h 53m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to JAX flight schedule
4 flight numbers flew this route in August 2026. The first usually leaves at 8:35am and the last at 6:55pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| WN 4132Southwest Airlines | 8:35am | 11:35am | 4 | n/a |
| WN 3071Southwest Airlines | 10:20am | 1:20pm | 16 | 93% |
| WN 2336Southwest Airlines | 2:05pm | 5:05pm | 12 | 33% |
| WN 4636Southwest Airlines | 6:55pm | 9:55pm | 4 | n/a |
Is STL to JAX on time?
From September 2025 to August 2026, 78% of 491 flights arrived within 15 minutes of schedule and 0.2% were cancelled. Flights leaving around 7am were the most punctual (98%), those around 1pm the least (66%). Most delay time was caused by late-arriving aircraft (52%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 491 | 78% | 13 min | 0.2% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 7am to 8am | 40 | 98% | |
| 8am to 9am | 93 | 84% | |
| 10am to 11am | 71 | 91% | |
| 1pm to 2pm | 29 | 66% | |
| 2pm to 3pm | 17 | 53% | |
| 3pm to 4pm | 30 | 73% | |
| 5pm to 6pm | 17 | 47% | |
| 6pm to 7pm | 47 | 83% | |
| 7pm to 8pm | 73 | 67% | |
| 8pm to 9pm | 40 | 75% | |
| 9pm to 10pm | 17 | 59% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 58 | 5,505 | |
| September 2025 | 56 | 5,484 | |
| October 2025 | 57 | 6,268 | |
| November 2025 | 54 | 5,656 | |
| December 2025 | 58 | 6,187 | |
| January 2026 | 19 | 1,772 | |
| February 2026 | 21 | 1,881 | |
| March 2026 | 32 | 3,492 | |
| April 2026 | 37 | 3,925 | |
| May 2026 | 41 | 4,730 | |
| June 2026 | 38 | 5,242 | |
| July 2026 | 39 | 5,313 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.