Route
SAT → MDW
San Antonio International Airport Chicago Midway International Airport
How punctual is this route?
- On-time arrivals
- 75.7%
- Less than 15 minutes late
- Cancelled
- 1.1%
- Of scheduled flights
- Average delay when late
- 51 min
- Flights arriving 15+ minutes late
- Flights tracked
- 659
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 48%
- Air traffic control & airport 24%
- Airline (crew, maintenance, cleaning) 23%
- Extreme weather 5%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 85.7% | 56 |
| October 2025 | 88.7% | 62 |
| November 2025 | 79.6% | 57 |
| December 2025 | 71.7% | 60 |
| January 2026 | 83.3% | 36 |
| February 2026 | 60.7% | 28 |
| March 2026 | 53.6% | 58 |
| April 2026 | 84.7% | 60 |
| May 2026 | 79.0% | 62 |
| June 2026 | 65.5% | 60 |
| July 2026 | 77.0% | 62 |
| August 2026 | 71.9% | 58 |
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 | 659 | 75.7% | 1.1% | 51 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN3583
18% late · 61 flights
-
WN3464
31% late · 58 flights
-
WN4168
2% late · 58 flights
-
WN3584
32% late · 52 flights
-
WN3591
27% late · 46 flights
-
WN2634
22% late · 42 flights
-
WN1590
26% late · 33 flights
-
WN2743
45% late · 33 flights
-
WN457
58% late · 33 flights
-
WN1525
0% late · 27 flights
-
WN2170
21% late · 24 flights
-
WN1973
5% late · 22 flights
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