St Louis (STL) to Kansas City (MCI) flights
Southwest Airlines flies nonstop from St. Louis Lambert International Airport to Kansas City International Airport, with about 21 flights a week in July 2026. The 237-mile flight takes about 1h 1m gate to gate.
- Distance
- 237 mi · 381 km
- Flight time
- 1h 1m
- Airlines
- 1
- Seats filled
- 74%
Airlines flying STL to MCI
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 21 | Boeing 737-700 / MAX 7, Boeing 737 MAX 8, Boeing 737-800 | 118,474 | 1h 1m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to MCI flight schedule
6 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 8:25am and the last at 8:45pm. 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 3261Southwest Airlines | 8:25am | 9:30am | 28 | 89% |
| WN 3855Southwest Airlines | 2:15pm | 3:20pm | 4 | n/a |
| WN 2530Southwest Airlines | 2:20pm | 3:25pm | 12 | 75% |
| WN 4268Southwest Airlines | 2:40pm | 3:45pm | 4 | n/a |
| WN 3401Southwest Airlines | 2:50pm | 3:55pm | 8 | n/a |
| WN 3955Southwest Airlines | 8:45pm | 9:50pm | 24 | 63% |
Is STL to MCI on time?
From September 2025 to August 2026, 76% of 1,017 flights arrived within 15 minutes of schedule and 0.2% were cancelled. Flights leaving around 8am were the most punctual (95%), those around 9pm the least (54%). Most delay time was caused by late-arriving aircraft (56%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 1,017 | 76% | 14 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 |
|---|---|---|---|
| 8am to 9am | 168 | 95% | |
| 9am to 10am | 63 | 86% | |
| 10am to 11am | 128 | 88% | |
| 1pm to 2pm | 39 | 95% | |
| 2pm to 3pm | 93 | 80% | |
| 3pm to 4pm | 63 | 73% | |
| 4pm to 5pm | 105 | 54% | |
| 7pm to 8pm | 28 | 82% | |
| 8pm to 9pm | 114 | 64% | |
| 9pm to 10pm | 123 | 54% | |
| 10pm to 11pm | 62 | 67% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 92 | 10,128 | |
| September 2025 | 93 | 10,902 | |
| October 2025 | 89 | 11,062 | |
| November 2025 | 81 | 9,147 | |
| December 2025 | 89 | 10,708 | |
| January 2026 | 70 | 8,365 | |
| February 2026 | 71 | 8,220 | |
| March 2026 | 88 | 9,190 | |
| April 2026 | 88 | 9,043 | |
| May 2026 | 98 | 11,093 | |
| June 2026 | 96 | 11,517 | |
| July 2026 | 95 | 10,585 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.