Route · MDW → SJC · 2020–2025 BTS data
Chicago to San Jose
The MDW–SJC corridor (Chicago, IL → San Jose, CA) runs behind the national average, served by 1 carrier across roughly 1,838 miles.
Data updated 2026-06-13
- 72.9%
- On-time
- -6.1 pts
- vs US avg
- 56 min
- Delay when late
- 2,489
- Flights
Cancelled
0.6%
Best Month
May 2025 81%
Worst Month
Aug 2024 58%
Distance
1,838 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 31 | 7 | 0 | 0 | WN |
| Nov 2025 | 30 | 4 | 2 | 0 | WN |
| Oct 2025 | 32 | 13 | 0 | 0 | WN |
| Sep 2025 | 52 | 15 | 0 | 0 | WN |
| Aug 2025 | 55 | 12 | 1 | 0 | WN |
| Jul 2025 | 79 | 22 | 0 | 0 | WN |
| Jun 2025 | 68 | 22 | 0 | 1 | WN |
| May 2025 | 53 | 10 | 0 | 1 | WN |
| Apr 2025 | 47 | 7 | 0 | 0 | WN |
| Mar 2025 | 31 | 3 | 1 | 0 | WN |
| Jan 2025 | 31 | 3 | 0 | 0 | WN |
| Dec 2024 | 31 | 8 | 1 | 0 | WN |
| Nov 2024 | 31 | 6 | 0 | 0 | WN |
| Oct 2024 | 45 | 6 | 0 | 0 | WN |
| Sep 2024 | 56 | 11 | 0 | 0 | WN |
| Aug 2024 | 59 | 25 | 0 | 0 | WN |
| Jul 2024 | 80 | 25 | 0 | 0 | WN |
| Jun 2024 | 73 | 23 | 0 | 3 | WN |
| May 2024 | 54 | 22 | 0 | 1 | WN |
| Apr 2024 | 46 | 10 | 0 | 0 | WN |
| Mar 2024 | 31 | 10 | 0 | 0 | WN |
| Jan 2024 | 31 | 9 | 1 | 0 | WN |
| Dec 2023 | 31 | 2 | 1 | 0 | WN |
| Nov 2023 | 30 | 7 | 0 | 0 | WN |
Cancellation Rate
0.6%
7 of 1,107 flights
Diversion Rate
0.5%
6 of 1,107 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 →SJC - San Jose
Full on-time, delay-cause, and seasonal performance for San Jose, CA.
Destination airport →Compare the two airports
See MDW and SJC 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–SJC.
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What the Data Says About MDW to SJC
On-time performance on the MDW to SJC pairing (Chicago to San Jose) trails a chunk of the network: 72.9% of 2,489 tracked flights arrived on schedule, with a 56.3-minute average delay on the ones that ran late. The route spans about 1,838 miles across 1 carrier. Cancellations over the trailing 24 months hit 0.6% (7 of 1,107 flights), with 0.5% diverted.
The monthly split is wide on this route: May 2025 posted the strongest performance at 81% on-time, while Aug 2024 came in at just 58% - a 24-point swing worth factoring into travel timing.
Frequently Asked Questions
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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.