Route · ORD → SAN · 2020–2025 BTS data
Chicago to San Diego
The ORD–SAN corridor (Chicago, IL → San Diego, CA) runs ahead of the national average, served by 14 carriers across roughly 1,723 miles.
Data updated 2026-06-13
- 79.7%
- On-time
- +0.7 pts
- vs US avg
- 77 min
- Delay when late
- 15,737
- Flights
Cancelled
1.2%
Best Month
Feb 2024 85%
Worst Month
Dec 2025 64%
Distance
1,723 mi
Carriers
14
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 308 | 111 | 6 | 1 | AS,AA,UA |
| Nov 2025 | 318 | 95 | 12 | 0 | UA,AA,AS |
| Oct 2025 | 357 | 90 | 3 | 3 | AA,AS,UA |
| Sep 2025 | 270 | 59 | 0 | 4 | UA,F9,AA |
| Aug 2025 | 320 | 84 | 2 | 0 | AA,F9,UA |
| Jul 2025 | 335 | 113 | 3 | 0 | AA,UA,F9 |
| Jun 2025 | 315 | 89 | 1 | 1 | AA,UA,F9 |
| May 2025 | 276 | 48 | 0 | 0 | AA,UA |
| Apr 2025 | 263 | 47 | 2 | 0 | UA,AA |
| Mar 2025 | 228 | 39 | 0 | 1 | AA,UA |
| Feb 2025 | 168 | 43 | 0 | 1 | AA,UA |
| Jan 2025 | 190 | 38 | 1 | 2 | AA,UA |
| Dec 2024 | 228 | 51 | 2 | 4 | AA,UA |
| Nov 2024 | 214 | 44 | 0 | 0 | UA,AA |
| Oct 2024 | 270 | 48 | 0 | 2 | UA,AA |
| Sep 2024 | 246 | 50 | 0 | 0 | UA,AA |
| Aug 2024 | 289 | 88 | 4 | 1 | AA,UA |
| Jul 2024 | 293 | 92 | 11 | 2 | AA,NK,UA |
| Jun 2024 | 269 | 92 | 2 | 1 | AA,UA |
| May 2024 | 247 | 86 | 2 | 0 | AA,UA |
| Apr 2024 | 235 | 56 | 1 | 0 | AA,UA |
| Mar 2024 | 207 | 34 | 0 | 0 | AA,UA |
| Feb 2024 | 187 | 28 | 1 | 0 | AA,UA |
| Jan 2024 | 209 | 40 | 20 | 1 | AA,UA |
Cancellation Rate
1.2%
73 of 6,242 flights
Diversion Rate
0.4%
24 of 6,242 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 →SAN - San Diego
Full on-time, delay-cause, and seasonal performance for San Diego, CA.
Destination airport →Compare the two airports
See ORD and SAN 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–SAN.
Routes with a similar on-time rate
What the Data Says About ORD to SAN
15,737 tracked flights put the ORD to SAN pairing (Chicago to San Diego) at a 79.7% on-time rate, squarely in line with the wider network. Delays that do occur run 76.5 minutes on average. Across the 1,723-mile route and its 14 carriers, the trailing 24 months show 1.2% cancelled and 0.4% diverted (6,242 flights sampled).
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 85% on-time, while Dec 2025 came in at just 64% - a 21-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from ORD to SAN? ▼
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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.