Route · BUF → MDW · 2020–2025 BTS data
Buffalo to Chicago
The BUF–MDW corridor (Buffalo, NY → Chicago, IL) runs ahead of the national average, served by 1 carrier across roughly 468 miles.
Data updated 2026-06-13
- 85.2%
- On-time
- +6.2 pts
- vs US avg
- 67 min
- Delay when late
- 4,668
- Flights
Cancelled
1.5%
Best Month
Oct 2024 95%
Worst Month
Dec 2025 72%
Distance
468 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 60 | 17 | 1 | 0 | WN |
| Nov 2025 | 56 | 8 | 3 | 0 | WN |
| Oct 2025 | 59 | 9 | 0 | 0 | WN |
| Sep 2025 | 82 | 9 | 0 | 0 | WN |
| Aug 2025 | 84 | 18 | 0 | 0 | WN |
| Jul 2025 | 97 | 22 | 1 | 1 | WN |
| Jun 2025 | 90 | 19 | 2 | 0 | WN |
| May 2025 | 57 | 7 | 0 | 0 | WN |
| Apr 2025 | 50 | 4 | 0 | 0 | WN |
| Mar 2025 | 32 | 6 | 0 | 0 | WN |
| Jan 2025 | 34 | 8 | 0 | 0 | WN |
| Dec 2024 | 60 | 11 | 1 | 0 | WN |
| Nov 2024 | 56 | 3 | 0 | 0 | WN |
| Oct 2024 | 60 | 3 | 0 | 0 | WN |
| Sep 2024 | 89 | 10 | 0 | 0 | WN |
| Aug 2024 | 90 | 15 | 0 | 2 | WN |
| Jul 2024 | 85 | 18 | 1 | 0 | WN |
| Jun 2024 | 78 | 16 | 0 | 0 | WN |
| May 2024 | 77 | 20 | 0 | 0 | WN |
| Apr 2024 | 72 | 12 | 0 | 1 | WN |
| Mar 2024 | 61 | 12 | 0 | 0 | WN |
| Feb 2024 | 42 | 0 | 0 | 0 | WN |
| Jan 2024 | 48 | 4 | 11 | 0 | WN |
| Dec 2023 | 63 | 9 | 3 | 0 | WN |
Cancellation Rate
1.5%
23 of 1,582 flights
Diversion Rate
0.3%
4 of 1,582 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BUF - Buffalo
Full on-time, delay-cause, and seasonal performance for Buffalo, NY.
Origin airport →MDW - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Destination airport →Compare the two airports
See BUF 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 BUF–MDW.
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What the Data Says About BUF to MDW
Buffalo to Chicago (BUF to MDW) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.2% on-time rate across 4,668 flights, with delays that do happen averaging 66.7 minutes. The corridor runs roughly 468 miles and is served by 1 carrier. Over the most recent 24 months, 23 of 1,582 flights were cancelled (1.5%) and 4 diverted (0.3%).
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 95% on-time, while Dec 2025 came in at just 72% - a 23-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from BUF to MDW? ▼
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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.