Route · SFO → MDW · 2020–2025 BTS data
San Francisco to Chicago
The SFO–MDW corridor (San Francisco, CA → Chicago, IL) runs ahead of the national average, served by 3 carriers across roughly 1,855 miles.
Data updated 2026-06-13
- 85.5%
- On-time
- +6.5 pts
- vs US avg
- 60 min
- Delay when late
- 1,440
- Flights
Cancelled
0.3%
Best Month
Jul 2024 81%
Worst Month
Jun 2024 68%
Distance
1,855 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 31 | 5 | 0 | 0 | WN |
| Nov 2025 | 30 | 4 | 0 | 1 | WN |
| Oct 2025 | 31 | 3 | 0 | 0 | WN |
| Sep 2025 | 30 | 10 | 0 | 0 | WN |
| Aug 2025 | 31 | 7 | 0 | 1 | WN |
| Jul 2025 | 31 | 5 | 1 | 1 | WN |
| Jun 2025 | 30 | 3 | 0 | 0 | WN |
| May 2025 | 31 | 10 | 0 | 0 | WN |
| Apr 2025 | 30 | 8 | 0 | 0 | WN |
| Dec 2024 | 31 | 3 | 0 | 0 | WN |
| Nov 2024 | 30 | 3 | 0 | 0 | WN |
| Oct 2024 | 43 | 9 | 0 | 0 | WN |
| Sep 2024 | 43 | 5 | 0 | 0 | WN |
| Aug 2024 | 52 | 14 | 0 | 0 | F9,WN |
| Jul 2024 | 72 | 14 | 0 | 0 | F9,WN |
| Jun 2024 | 63 | 20 | 0 | 0 | F9,WN |
| Dec 2023 | 31 | 12 | 0 | 1 | F9 |
| Nov 2023 | 30 | 4 | 0 | 0 | F9 |
| Oct 2023 | 32 | 3 | 0 | 0 | F9,WN |
| Sep 2023 | 34 | 10 | 0 | 0 | F9,WN |
| Aug 2023 | 35 | 14 | 1 | 0 | F9,WN |
| Jul 2023 | 34 | 8 | 0 | 0 | F9,WN |
| Jun 2023 | 30 | 13 | 1 | 0 | F9 |
| Dec 2021 | 31 | 1 | 0 | 0 | WN |
Cancellation Rate
0.3%
3 of 866 flights
Diversion Rate
0.5%
4 of 866 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SFO - San Francisco
Full on-time, delay-cause, and seasonal performance for San Francisco, CA.
Origin airport →MDW - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Destination airport →Compare the two airports
See SFO and MDW side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SFO–MDW.
Routes with a similar on-time rate
What the Data Says About SFO to MDW
San Francisco to Chicago (SFO to MDW) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.5% on-time rate across 1,440 flights, with delays that do happen averaging 60.2 minutes. The corridor runs roughly 1,855 miles and is served by 3 carriers. Over the most recent 24 months, 3 of 866 flights were cancelled (0.3%) and 4 diverted (0.5%).
Monthly performance varies moderately here: Jul 2024 was the strongest month at 81% on-time versus Jun 2024 at 68%, a 12-point difference.
Frequently Asked Questions
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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.