Route · MDW → BOS · 2020–2025 BTS data
Chicago to Boston
The MDW–BOS corridor (Chicago, IL → Boston, MA) runs behind the national average, served by 1 carrier across roughly 861 miles.
Data updated 2026-06-13
- 75.8%
- On-time
- -3.2 pts
- vs US avg
- 61 min
- Delay when late
- 7,295
- Flights
Cancelled
0.8%
Best Month
Jan 2025 92%
Worst Month
Sep 2025 55%
Distance
861 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 90 | 24 | 0 | 0 | WN |
| Nov 2025 | 88 | 22 | 4 | 0 | WN |
| Oct 2025 | 139 | 52 | 1 | 0 | WN |
| Sep 2025 | 128 | 57 | 0 | 0 | WN |
| Aug 2025 | 134 | 35 | 0 | 0 | WN |
| Jul 2025 | 172 | 54 | 4 | 0 | WN |
| Jun 2025 | 157 | 57 | 0 | 0 | WN |
| May 2025 | 101 | 39 | 0 | 0 | WN |
| Apr 2025 | 94 | 12 | 0 | 0 | WN |
| Mar 2025 | 83 | 17 | 1 | 0 | WN |
| Feb 2025 | 66 | 12 | 0 | 0 | WN |
| Jan 2025 | 71 | 6 | 0 | 1 | WN |
| Dec 2024 | 91 | 27 | 1 | 0 | WN |
| Nov 2024 | 89 | 15 | 0 | 0 | WN |
| Oct 2024 | 139 | 16 | 0 | 0 | WN |
| Sep 2024 | 136 | 26 | 0 | 0 | WN |
| Aug 2024 | 144 | 47 | 1 | 1 | WN |
| Jul 2024 | 170 | 52 | 1 | 0 | WN |
| Jun 2024 | 160 | 62 | 0 | 0 | WN |
| May 2024 | 108 | 29 | 0 | 0 | WN |
| Apr 2024 | 102 | 14 | 0 | 0 | WN |
| Mar 2024 | 97 | 22 | 0 | 0 | WN |
| Feb 2024 | 75 | 9 | 1 | 0 | WN |
| Jan 2024 | 83 | 21 | 9 | 0 | WN |
Cancellation Rate
0.8%
23 of 2,717 flights
Diversion Rate
0.1%
2 of 2,717 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 →BOS - Boston
Full on-time, delay-cause, and seasonal performance for Boston, MA.
Destination airport →Compare the two airports
See MDW and BOS 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–BOS.
Routes with a similar on-time rate
What the Data Says About MDW to BOS
The Chicago to Boston corridor (MDW to BOS) posts a 75.8% on-time rate on the lower edge of the average band, based on 7,295 tracked flights. Late flights run 60.5 minutes behind on average. 1 carrier cover the 861-mile route; over the last 24 months, 23 of 2,717 flights were cancelled (0.8%) and 0.1% diverted.
The monthly split is wide on this route: Jan 2025 posted the strongest performance at 92% on-time, while Sep 2025 came in at just 55% - a 36-point swing worth factoring into travel timing.
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.