Route · DEN → SAN · 2020–2025 BTS data
Denver to San Diego
The DEN–SAN corridor (Denver, CO → San Diego, CA) runs behind the national average, served by 11 carriers across roughly 853 miles.
Data updated 2026-06-13
- 78%
- On-time
- -1 pts
- vs US avg
- 60 min
- Delay when late
- 28,912
- Flights
Cancelled
1.1%
Best Month
Sep 2024 84%
Worst Month
Jul 2025 66%
Distance
853 mi
Carriers
11
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 538 | 156 | 3 | 3 | WN,F9,AS,UA,OO |
| Nov 2025 | 529 | 106 | 13 | 0 | OO,UA,F9,AS,WN |
| Oct 2025 | 532 | 140 | 1 | 5 | AS,OO,UA,WN,F9 |
| Sep 2025 | 411 | 111 | 3 | 1 | UA,WN,F9 |
| Aug 2025 | 436 | 132 | 2 | 0 | WN,F9,UA |
| Jul 2025 | 458 | 158 | 4 | 1 | UA,WN,F9 |
| Jun 2025 | 458 | 158 | 2 | 0 | UA,WN,F9 |
| May 2025 | 458 | 119 | 3 | 0 | UA,WN,F9 |
| Apr 2025 | 434 | 101 | 3 | 0 | F9,UA,WN |
| Mar 2025 | 449 | 76 | 1 | 1 | UA,WN,F9 |
| Feb 2025 | 383 | 105 | 1 | 1 | UA,WN,F9 |
| Jan 2025 | 427 | 85 | 2 | 5 | UA,WN,F9 |
| Dec 2024 | 452 | 88 | 12 | 10 | F9,UA,WN |
| Nov 2024 | 459 | 98 | 4 | 0 | UA,WN,F9 |
| Oct 2024 | 495 | 113 | 5 | 4 | UA,WN,F9 |
| Sep 2024 | 459 | 74 | 0 | 0 | WN,UA,F9 |
| Aug 2024 | 481 | 112 | 7 | 1 | F9,WN,UA |
| Jul 2024 | 499 | 165 | 6 | 1 | F9,UA,WN |
| Jun 2024 | 516 | 164 | 9 | 3 | F9,UA,WN |
| May 2024 | 497 | 125 | 6 | 1 | F9,UA,WN |
| Apr 2024 | 461 | 106 | 1 | 0 | F9,UA,WN |
| Mar 2024 | 448 | 97 | 4 | 0 | F9,UA,WN |
| Feb 2024 | 390 | 108 | 1 | 0 | F9,UA,WN |
| Jan 2024 | 401 | 81 | 25 | 0 | F9,WN,UA |
Cancellation Rate
1.1%
118 of 11,071 flights
Diversion Rate
0.3%
37 of 11,071 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
DEN - Denver
Full on-time, delay-cause, and seasonal performance for Denver, CO.
Origin airport →SAN - San Diego
Full on-time, delay-cause, and seasonal performance for San Diego, CA.
Destination airport →Compare the two airports
See DEN 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 DEN–SAN.
Routes with a similar on-time rate
What the Data Says About DEN to SAN
The Denver to San Diego corridor (DEN to SAN) posts a 78% on-time rate on the lower edge of the average band, based on 28,912 tracked flights. Late flights run 60.1 minutes behind on average. 11 carriers cover the 853-mile route; over the last 24 months, 118 of 11,071 flights were cancelled (1.1%) and 0.3% diverted.
The monthly split is wide on this route: Sep 2024 posted the strongest performance at 84% on-time, while Jul 2025 came in at just 66% - a 18-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.