Route · MDW → SAT · 2020–2025 BTS data
Chicago to San Antonio
The MDW–SAT corridor (Chicago, IL → San Antonio, TX) runs behind the national average, served by 1 carrier across roughly 1,036 miles.
Data updated 2026-06-13
- 78.3%
- On-time
- -0.7 pts
- vs US avg
- 60 min
- Delay when late
- 3,520
- Flights
Cancelled
0.6%
Best Month
Oct 2024 89%
Worst Month
Jul 2024 53%
Distance
1,036 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 60 | 15 | 0 | 0 | WN |
| Nov 2025 | 57 | 9 | 2 | 0 | WN |
| Oct 2025 | 62 | 8 | 0 | 0 | WN |
| Sep 2025 | 56 | 7 | 0 | 0 | WN |
| Aug 2025 | 60 | 14 | 0 | 0 | WN |
| Jul 2025 | 74 | 24 | 1 | 0 | WN |
| Jun 2025 | 72 | 24 | 0 | 1 | WN |
| May 2025 | 62 | 15 | 0 | 0 | WN |
| Apr 2025 | 60 | 12 | 1 | 0 | WN |
| Mar 2025 | 61 | 8 | 0 | 0 | WN |
| Feb 2025 | 52 | 7 | 0 | 0 | WN |
| Jan 2025 | 58 | 12 | 1 | 0 | WN |
| Dec 2024 | 60 | 9 | 0 | 0 | WN |
| Nov 2024 | 57 | 10 | 0 | 0 | WN |
| Oct 2024 | 62 | 7 | 0 | 0 | WN |
| Sep 2024 | 56 | 8 | 0 | 0 | WN |
| Aug 2024 | 58 | 12 | 0 | 0 | WN |
| Jul 2024 | 62 | 29 | 0 | 1 | WN |
| Jun 2024 | 60 | 20 | 0 | 0 | WN |
| May 2024 | 62 | 27 | 0 | 0 | WN |
| Apr 2024 | 60 | 18 | 0 | 0 | WN |
| Mar 2024 | 58 | 8 | 0 | 1 | WN |
| Feb 2024 | 42 | 7 | 0 | 0 | WN |
| Jan 2024 | 48 | 9 | 4 | 0 | WN |
Cancellation Rate
0.6%
9 of 1,419 flights
Diversion Rate
0.2%
3 of 1,419 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
MDW - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Origin airport →SAT - San Antonio
Full on-time, delay-cause, and seasonal performance for San Antonio, TX.
Destination airport →Compare the two airports
See MDW and SAT side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to MDW–SAT.
Routes with a similar on-time rate
What the Data Says About MDW to SAT
The Chicago to San Antonio corridor (MDW to SAT) posts a 78.3% on-time rate on the lower edge of the average band, based on 3,520 tracked flights. Late flights run 59.9 minutes behind on average. 1 carrier cover the 1,036-mile route; over the last 24 months, 9 of 1,419 flights were cancelled (0.6%) and 0.2% diverted.
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 89% on-time, while Jul 2024 came in at just 53% - a 36-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from MDW to SAT? ▼
What is the cancellation rate for MDW to SAT? ▼
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Flight Guides
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.