Route
MDW → SAT
Chicago Midway International Airport San Antonio International Airport
How punctual is this route?
- On-time arrivals
- 76.3%
- Less than 15 minutes late
- Cancelled
- 1.2%
- Of scheduled flights
- Average delay when late
- 64 min
- Flights arriving 15+ minutes late
- Flights tracked
- 659
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 49%
- Airline (crew, maintenance, cleaning) 34%
- Air traffic control & airport 16%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 87.5% | 56 |
| October 2025 | 87.1% | 62 |
| November 2025 | 83.6% | 57 |
| December 2025 | 75.0% | 60 |
| January 2026 | 72.2% | 36 |
| February 2026 | 96.4% | 28 |
| March 2026 | 81.8% | 58 |
| April 2026 | 74.6% | 60 |
| May 2026 | 75.8% | 62 |
| June 2026 | 53.4% | 60 |
| July 2026 | 72.1% | 62 |
| August 2026 | 65.5% | 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 | 76.3% | 1.2% | 64 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN3229
53% late · 60 flights
-
WN2350
25% late · 58 flights
-
WN4347
17% late · 58 flights
-
WN2168
21% late · 57 flights
-
WN424
13% late · 55 flights
-
WN3776
26% late · 51 flights
-
WN2471
12% late · 33 flights
-
WN3998
32% late · 33 flights
-
WN1162
16% late · 31 flights
-
WN1469
13% late · 31 flights
-
WN1635
10% late · 31 flights
-
WN2570
26% late · 27 flights
-
WN2064
13% late · 23 flights
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