Route · SEA → ORD · 2020–2025 BTS data
Seattle to Chicago
The SEA–ORD corridor (Seattle, WA → Chicago, IL) runs ahead of the national average, served by 14 carriers across roughly 1,721 miles.
Data updated 2026-06-13
- 82%
- On-time
- +3 pts
- vs US avg
- 72 min
- Delay when late
- 27,905
- Flights
Cancelled
1.0%
Best Month
Nov 2024 87%
Worst Month
Aug 2025 62%
Distance
1,721 mi
Carriers
14
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 382 | 112 | 7 | 0 | DL,AS,AA,UA |
| Nov 2025 | 390 | 94 | 13 | 5 | UA,DL,AA,AS |
| Oct 2025 | 496 | 93 | 3 | 2 | AA,AS,DL,UA |
| Sep 2025 | 509 | 103 | 0 | 1 | UA,DL,AA,AS |
| Aug 2025 | 599 | 227 | 10 | 9 | AA,UA,AS,DL |
| Jul 2025 | 623 | 211 | 8 | 8 | AA,AS,DL,UA |
| Jun 2025 | 571 | 165 | 4 | 2 | AA,AS,DL,UA |
| May 2025 | 536 | 108 | 2 | 1 | AA,AS,UA,DL |
| Apr 2025 | 426 | 86 | 2 | 1 | DL,UA,AA,AS |
| Mar 2025 | 331 | 49 | 4 | 1 | AA,AS,UA,DL |
| Feb 2025 | 259 | 53 | 1 | 0 | AA,AS,UA,DL |
| Jan 2025 | 283 | 60 | 0 | 1 | AA,AS,UA,DL |
| Dec 2024 | 366 | 57 | 1 | 0 | AA,AS,DL,UA |
| Nov 2024 | 357 | 47 | 0 | 0 | UA,AS,DL,AA |
| Oct 2024 | 435 | 60 | 1 | 0 | UA,AS,DL,AA |
| Sep 2024 | 483 | 103 | 0 | 0 | UA,AA,AS,DL |
| Aug 2024 | 551 | 160 | 1 | 0 | AA,AS,DL,UA |
| Jul 2024 | 575 | 174 | 13 | 9 | AA,AS,DL,UA |
| Jun 2024 | 522 | 119 | 6 | 3 | AA,AS,DL,UA |
| May 2024 | 466 | 153 | 8 | 6 | AA,AS,DL,UA |
| Apr 2024 | 398 | 66 | 0 | 0 | AA,AS,DL,UA |
| Mar 2024 | 312 | 43 | 1 | 1 | AA,AS,DL,UA |
| Feb 2024 | 248 | 39 | 0 | 1 | AA,AS,DL,UA |
| Jan 2024 | 272 | 68 | 19 | 0 | AA,AS,DL,UA |
Cancellation Rate
1.0%
104 of 10,390 flights
Diversion Rate
0.5%
51 of 10,390 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Origin airport →ORD - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Destination airport →Compare the two airports
See SEA 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 SEA–ORD.
Routes with a similar on-time rate
What the Data Says About SEA to ORD
Bureau of Transportation Statistics records show Seattle to Chicago (SEA to ORD) running a 82% on-time rate over 27,905 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 71.8 minutes. The 1,721-mile corridor is served by 14 carriers, and over the last 24 months 1.0% of 10,390 flights were cancelled, 0.5% diverted.
The monthly split is wide on this route: Nov 2024 posted the strongest performance at 87% on-time, while Aug 2025 came in at just 62% - a 25-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from SEA to ORD? ▼
What is the cancellation rate for SEA to ORD? ▼
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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.