Route · ORD → BOS · 2020–2025 BTS data
Chicago to Boston
The ORD–BOS corridor (Chicago, IL → Boston, MA) runs behind the national average, served by 47 carriers across roughly 867 miles.
Data updated 2026-06-13
- 78.5%
- On-time
- -0.5 pts
- vs US avg
- 79 min
- Delay when late
- 35,759
- Flights
Cancelled
1.4%
Best Month
Feb 2024 85%
Worst Month
Sep 2025 57%
Distance
867 mi
Carriers
47
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 557 | 185 | 5 | 4 | DL,YX,B6,AA,MQ,UA |
| Nov 2025 | 639 | 163 | 30 | 3 | UA,DL,MQ,AA,B6,YX |
| Oct 2025 | 695 | 292 | 6 | 1 | AA,B6,DL,UA,YX,MQ |
| Sep 2025 | 660 | 286 | 4 | 3 | MQ,UA,DL,YX,AA,B6 |
| Aug 2025 | 685 | 175 | 15 | 1 | AA,YX,MQ,UA,B6,DL |
| Jul 2025 | 673 | 236 | 19 | 0 | AA,B6,UA,YX,DL,MQ |
| Jun 2025 | 670 | 204 | 3 | 1 | AA,B6,DL,UA,YX,MQ |
| May 2025 | 645 | 214 | 4 | 2 | AA,B6,DL,UA,YX,MQ |
| Apr 2025 | 543 | 92 | 7 | 1 | DL,MQ,UA,YX,AA,B6 |
| Mar 2025 | 570 | 132 | 4 | 0 | AA,B6,UA,YX,DL,MQ |
| Feb 2025 | 467 | 92 | 8 | 0 | AA,B6,UA,YX,MQ |
| Jan 2025 | 486 | 74 | 4 | 0 | AA,B6,UA,YX,MQ |
| Dec 2024 | 503 | 110 | 1 | 3 | AA,B6,DL,MQ,NK,UA,YX |
| Nov 2024 | 580 | 92 | 0 | 0 | UA,B6,MQ,NK,YX,DL,AA |
| Oct 2024 | 631 | 104 | 0 | 0 | UA,MQ,DL,NK,B6,AA |
| Sep 2024 | 624 | 125 | 0 | 0 | YX,UA,AA,B6,DL,MQ,NK |
| Aug 2024 | 703 | 226 | 15 | 1 | AA,B6,DL,MQ,NK,YX,UA |
| Jul 2024 | 670 | 211 | 20 | 1 | AA,B6,DL,MQ,NK,UA,YX |
| Jun 2024 | 654 | 195 | 6 | 2 | AA,B6,DL,MQ,NK,OO,UA,YX |
| May 2024 | 623 | 200 | 5 | 1 | AA,B6,DL,MQ,UA,YX |
| Apr 2024 | 536 | 114 | 2 | 1 | AA,B6,DL,MQ,UA,YX |
| Mar 2024 | 509 | 86 | 0 | 0 | AA,B6,DL,MQ,YX,UA |
| Feb 2024 | 438 | 64 | 2 | 0 | AA,B6,MQ,UA,YX |
| Jan 2024 | 466 | 133 | 37 | 2 | AA,B6,MQ,YX,UA |
Cancellation Rate
1.4%
197 of 14,227 flights
Diversion Rate
0.2%
27 of 14,227 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
ORD - 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 ORD 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 ORD–BOS.
Routes with a similar on-time rate
What the Data Says About ORD to BOS
35,759 tracked flights put the ORD to BOS pairing (Chicago to Boston) at a 78.5% on-time rate, squarely in line with the wider network. Delays that do occur run 79.0 minutes on average. Across the 867-mile route and its 47 carriers, the trailing 24 months show 1.4% cancelled and 0.2% diverted (14,227 flights sampled).
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 85% on-time, while Sep 2025 came in at just 57% - a 29-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from ORD to BOS? ▼
What is the cancellation rate for ORD to BOS? ▼
How far is the flight from ORD to BOS? ▼
When is the best time to fly from ORD to BOS? ▼
Flight Guides
Tips and data-driven advice for choosing reliable routes.
Explore PlainFlights
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.