Sacramento (SMF) to St Louis (STL) flights
Southwest Airlines flies nonstop from Sacramento International Airport to St. Louis Lambert International Airport, with about 7 flights a week in July 2026. The 1,679-mile flight takes about 3h 29m gate to gate.
- Distance
- 1,679 mi · 2,702 km
- Flight time
- 3h 29m
- Airlines
- 1
- Seats filled
- 87%
Airlines flying SMF to STL
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 7 | Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 7 | 49,956 | 3h 29m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SMF to STL flight schedule
2 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 9:50am and the last at 12:25pm. 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 4783Southwest Airlines | 9:50am | 3:25pm | 4 | n/a |
| WN 3755Southwest Airlines | 12:25pm | 6:00pm | 24 | 79% |
Is SMF to STL on time?
From September 2025 to August 2026, 79% of 331 flights arrived within 15 minutes of schedule and 0% were cancelled. Flights leaving around 6am were the most punctual (100%), those around 2pm the least (65%). Most delay time was caused by late-arriving aircraft (47%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 331 | 79% | 10 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 |
|---|---|---|---|
| 6am to 7am | 18 | 100% | |
| 7am to 8am | 12 | 83% | |
| 10am to 11am | 49 | 88% | |
| 11am to 12pm | 35 | 83% | |
| 12pm to 1pm | 74 | 76% | |
| 1pm to 2pm | 103 | 71% | |
| 2pm to 3pm | 17 | 65% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 32 | 4,556 | |
| September 2025 | 30 | 4,388 | |
| October 2025 | 31 | 4,557 | |
| November 2025 | 29 | 4,467 | |
| December 2025 | 31 | 4,485 | |
| January 2026 | 10 | 1,482 | |
| February 2026 | 18 | 2,427 | |
| March 2026 | 29 | 4,284 | |
| April 2026 | 30 | 4,534 | |
| May 2026 | 31 | 4,817 | |
| June 2026 | 31 | 5,067 | |
| July 2026 | 30 | 4,892 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.