Route · SAT → MDW · 2020–2025 BTS data
San Antonio to Chicago
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SAT to MDW (San Antonio to Chicago) ranks #3129 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 87.9%
- On-time
- +8.9 pts
- vs US avg
- 56 min
- Delay when late
- 3,461
- Flights
- #3129 of 4927
- Corpus placement
Cancelled
0.8%
Best Month
Feb 2025 100%
Worst Month
Dec 2025 72%
Distance
1,036 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 60 | 17 | 0 | 0 | WN |
| Nov 2025 | 57 | 11 | 2 | 1 | WN |
| Oct 2025 | 62 | 7 | 0 | 0 | WN |
| Sep 2025 | 56 | 8 | 0 | 0 | WN |
| Aug 2025 | 60 | 9 | 0 | 0 | WN |
| Jul 2025 | 74 | 8 | 1 | 0 | WN |
| Jun 2025 | 72 | 6 | 0 | 1 | WN |
| May 2025 | 61 | 10 | 0 | 0 | WN |
| Apr 2025 | 60 | 8 | 1 | 0 | WN |
| Mar 2025 | 61 | 8 | 0 | 2 | WN |
| Feb 2025 | 52 | 0 | 1 | 0 | WN |
| Jan 2025 | 59 | 6 | 1 | 0 | WN |
| Dec 2024 | 60 | 10 | 0 | 0 | WN |
| Nov 2024 | 57 | 5 | 0 | 0 | WN |
| Oct 2024 | 62 | 2 | 0 | 0 | WN |
| Sep 2024 | 56 | 2 | 0 | 0 | WN |
| Aug 2024 | 58 | 6 | 0 | 0 | WN |
| Jul 2024 | 62 | 15 | 1 | 0 | WN |
| Jun 2024 | 60 | 9 | 1 | 0 | WN |
| May 2024 | 62 | 16 | 0 | 1 | WN |
| Apr 2024 | 60 | 13 | 0 | 0 | WN |
| Mar 2024 | 60 | 7 | 0 | 0 | WN |
| Feb 2024 | 50 | 2 | 0 | 0 | WN |
| Jan 2024 | 56 | 10 | 3 | 0 | WN |
SAT–MDW seasonal on-time pattern
Best: February (93.9%) · weakest: December (81.6%)
Strongest calendar month
February
93.9% on-time · ~46 flights/mo
Busiest calendar month
December
~61 flights/mo avg
Weakest calendar month
December
81.6% on-time · ~61 flights/mo
Cancellation Rate
0.8%
11 of 1,437 flights
Diversion Rate
0.3%
5 of 1,437 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SAT - San Antonio
Full on-time, delay-cause, and seasonal performance for San Antonio, TX.
SAT on-time profileMDW - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
MDW on-time profileCompare the two airports
See SAT and MDW side by side on delays, cancellations, and reliability.
Compare SAT vs MDWOrigin-hub reliability standing
Among SAT's stronger departures
SAT → MDW posts a 87.9% on-time rate, landing in the ≥85% band with 17 of 31 BTS-tracked routes leaving San Antonio. The same hub also shows 12 mid-band and 2 challenged departures · fleet-wide on-time rank #439 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to SAT–MDW.
Routes with a similar on-time rate
What the Data Says About SAT to MDW
San Antonio to Chicago (SAT to MDW) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.9% on-time rate across 3,461 flights, with delays that do happen averaging 56.1 minutes. The corridor runs roughly 1,036 miles and is served by 1 carrier. Over the most recent 24 months, 11 of 1,437 flights were cancelled (0.8%) and 5 diverted (0.3%).
The monthly split is wide on this route: Feb 2025 posted the strongest performance at 100% on-time, while Dec 2025 came in at just 72% - a 28-point swing worth factoring into travel timing.
On the multi-year calendar, SAT–MDW peaks in February at 93.9% on-time while December carries the heaviest traffic (~61 flights per month) ; the softest month is December at 81.6%, a 12.3-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does SAT to MDW rank among US routes by traffic? ▼
How often are flights delayed from SAT to MDW? ▼
What is the cancellation rate for SAT to MDW? ▼
How far is the flight from SAT to MDW? ▼
When is the best time to fly from SAT to MDW? ▼
Airports on this route
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.
Using SAT–MDW data
SAT–MDW runs 8.9 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare SAT and MDW airport profiles: delay causes and top routes differ even on the same corridor. SAT airport
- If your dates flex, February (93.9% on-time) beats December (81.6%) on this corridor. Seasonal chart
- 4 other routes post a similar 87.9% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.