Route · BOS → ORD · 2020–2025 BTS data
Boston to Chicago
The BOS–ORD corridor (Boston, MA → Chicago, IL) runs ahead of the national average, served by 46 carriers across roughly 867 miles.
Data updated 2026-06-13
- 82.1%
- On-time
- +3.1 pts
- vs US avg
- 84 min
- Delay when late
- 35,774
- Flights
Cancelled
1.4%
Best Month
Feb 2024 94%
Worst Month
Oct 2025 64%
Distance
867 mi
Carriers
46
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 556 | 167 | 4 | 0 | DL,YX,B6,AA,MQ,UA |
| Nov 2025 | 642 | 173 | 29 | 0 | UA,MQ,AA,B6,DL,YX |
| Oct 2025 | 695 | 248 | 6 | 1 | AA,B6,UA,YX,DL,MQ |
| Sep 2025 | 660 | 210 | 4 | 1 | MQ,UA,DL,YX,AA,B6 |
| Aug 2025 | 683 | 173 | 15 | 5 | AA,YX,MQ,UA,B6,DL |
| Jul 2025 | 673 | 197 | 22 | 8 | AA,B6,UA,YX,DL,MQ |
| Jun 2025 | 669 | 179 | 5 | 1 | AA,B6,UA,YX,DL,MQ |
| May 2025 | 646 | 157 | 5 | 0 | AA,B6,UA,YX,DL,MQ |
| Apr 2025 | 543 | 120 | 6 | 0 | DL,MQ,UA,YX,AA,B6 |
| Mar 2025 | 570 | 87 | 5 | 2 | AA,B6,UA,YX,DL,MQ |
| Feb 2025 | 466 | 132 | 8 | 0 | AA,B6,UA,YX,MQ |
| Jan 2025 | 487 | 71 | 3 | 1 | AA,B6,UA,YX,MQ |
| Dec 2024 | 505 | 91 | 2 | 1 | AA,B6,DL,MQ,NK,UA,YX |
| Nov 2024 | 579 | 65 | 0 | 0 | UA,B6,MQ,NK,YX,DL,AA |
| Oct 2024 | 630 | 107 | 0 | 2 | UA,MQ,DL,NK,B6,AA |
| Sep 2024 | 623 | 103 | 1 | 0 | YX,UA,AA,B6,DL,MQ,NK |
| Aug 2024 | 703 | 198 | 17 | 0 | AA,B6,DL,MQ,NK,YX,UA |
| Jul 2024 | 670 | 183 | 25 | 4 | AA,B6,DL,MQ,NK,UA,YX |
| Jun 2024 | 654 | 153 | 5 | 3 | AA,B6,DL,MQ,NK,OO,UA,YX |
| May 2024 | 622 | 144 | 5 | 4 | AA,B6,DL,MQ,UA,YX |
| Apr 2024 | 536 | 96 | 3 | 0 | AA,B6,DL,MQ,UA,YX |
| Mar 2024 | 506 | 50 | 0 | 0 | AA,B6,DL,MQ,YX,UA |
| Feb 2024 | 437 | 27 | 1 | 3 | AA,B6,MQ,UA,YX |
| Jan 2024 | 467 | 88 | 35 | 2 | AA,B6,MQ,YX,UA |
Cancellation Rate
1.4%
206 of 14,222 flights
Diversion Rate
0.3%
38 of 14,222 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BOS - Boston
Full on-time, delay-cause, and seasonal performance for Boston, MA.
Origin airport →ORD - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Destination airport →Compare the two airports
See BOS and ORD side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to BOS–ORD.
Routes with a similar on-time rate
What the Data Says About BOS to ORD
Bureau of Transportation Statistics records show Boston to Chicago (BOS to ORD) running a 82.1% on-time rate over 35,774 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 83.7 minutes. The 867-mile corridor is served by 46 carriers, and over the last 24 months 1.4% of 14,222 flights were cancelled, 0.3% diverted.
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 94% on-time, while Oct 2025 came in at just 64% - a 30-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.