Route
STL → MCI
St. Louis Lambert International Airport Kansas City International Airport
How punctual is this route?
- On-time arrivals
- 75.5%
- Less than 15 minutes late
- Cancelled
- 0.2%
- Of scheduled flights
- Average delay when late
- 58 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,017
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 56%
- Airline (crew, maintenance, cleaning) 28%
- Air traffic control & airport 10%
- Extreme weather 6%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 84.4% | 90 |
| October 2025 | 77.3% | 88 |
| November 2025 | 85.2% | 81 |
| December 2025 | 59.5% | 85 |
| January 2026 | 80.0% | 70 |
| February 2026 | 81.7% | 71 |
| March 2026 | 80.2% | 87 |
| April 2026 | 73.3% | 86 |
| May 2026 | 73.9% | 88 |
| June 2026 | 63.3% | 90 |
| July 2026 | 73.9% | 92 |
| August 2026 | 75.3% | 89 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 1,017 | 75.5% | 0.2% | 58 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN2453
40% late · 60 flights
-
WN4481
5% late · 58 flights
-
WN2753
51% late · 57 flights
-
WN3794
31% late · 55 flights
-
WN1440
24% late · 46 flights
-
WN1998
26% late · 46 flights
-
WN2430
17% late · 42 flights
-
WN3943
6% late · 35 flights
-
WN4313
0% late · 33 flights
-
WN814
38% late · 33 flights
-
WN2803
23% late · 31 flights
-
WN3610
13% late · 31 flights
-
WN3261
11% late · 28 flights
-
WN3528
11% late · 27 flights
-
WN3944
52% late · 27 flights
-
WN3793
16% late · 25 flights
-
WN3960
28% late · 25 flights
-
WN2223
38% late · 24 flights
-
WN3955
38% late · 24 flights
-
WN4343
30% late · 20 flights
-
WN449
5% late · 20 flights
Reviews
No reviews yet. Be the first to review this route.