St Louis (STL) to Sacramento (SMF) flights
Southwest Airlines flies nonstop from St. Louis Lambert International Airport to Sacramento International Airport, with about 8 flights a week in July 2026. The 1,679-mile flight takes about 4h 3m gate to gate.
- Distance
- 1,679 mi · 2,702 km
- Flight time
- 4h 3m
- Airlines
- 1
- Seats filled
- 87%
Airlines flying STL to SMF
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 8 | Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 7 | 49,011 | 4h 3m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to SMF flight schedule
2 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 8:25am and the last at 8:30am. 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 3892Southwest Airlines | 8:25am | 10:25am | 24 | 92% |
| WN 4752Southwest Airlines | 8:30am | 10:30am | 4 | n/a |
Is STL to SMF on time?
From September 2025 to August 2026, 80% of 331 flights arrived within 15 minutes of schedule and 0% were cancelled. Flights leaving around 1pm were the most punctual (96%), those around 5pm the least (59%). Most delay time was caused by late-arriving aircraft (55%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 331 | 80% | 11 min | 0% |
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 |
|---|---|---|---|
| 8am to 9am | 157 | 86% | |
| 9am to 10am | 18 | 94% | |
| 1pm to 2pm | 27 | 96% | |
| 3pm to 4pm | 17 | 71% | |
| 4pm to 5pm | 39 | 72% | |
| 5pm to 6pm | 29 | 59% | |
| 6pm to 7pm | 30 | 60% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 31 | 4,446 | |
| September 2025 | 30 | 4,505 | |
| October 2025 | 31 | 4,599 | |
| November 2025 | 29 | 4,101 | |
| December 2025 | 31 | 4,444 | |
| January 2026 | 10 | 1,398 | |
| February 2026 | 18 | 2,570 | |
| March 2026 | 29 | 4,132 | |
| April 2026 | 30 | 4,352 | |
| May 2026 | 31 | 4,829 | |
| June 2026 | 30 | 4,623 | |
| July 2026 | 34 | 5,012 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.