Route · SAN → DEN · 2020–2025 BTS data
San Diego to Denver
The SAN–DEN corridor (San Diego, CA → Denver, CO) runs ahead of the national average, served by 13 carriers across roughly 853 miles.
Data updated 2026-06-13
- 82.1%
- On-time
- +3.1 pts
- vs US avg
- 66 min
- Delay when late
- 28,968
- Flights
Cancelled
1.1%
Best Month
Mar 2024 87%
Worst Month
Jun 2025 64%
Distance
853 mi
Carriers
13
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 537 | 142 | 7 | 4 | WN,F9,AS,UA,OO |
| Nov 2025 | 529 | 86 | 14 | 0 | OO,UA,F9,AS,WN |
| Oct 2025 | 531 | 102 | 3 | 0 | AS,OO,UA,WN,F9 |
| Sep 2025 | 411 | 89 | 3 | 1 | UA,WN,F9 |
| Aug 2025 | 436 | 118 | 3 | 2 | WN,F9,UA |
| Jul 2025 | 458 | 141 | 2 | 8 | UA,WN,F9 |
| Jun 2025 | 458 | 164 | 4 | 4 | UA,WN,F9 |
| May 2025 | 464 | 145 | 5 | 2 | UA,WN,F9 |
| Apr 2025 | 435 | 109 | 1 | 3 | F9,UA,WN |
| Mar 2025 | 450 | 70 | 2 | 1 | UA,WN,F9 |
| Feb 2025 | 391 | 62 | 1 | 1 | UA,WN,F9 |
| Jan 2025 | 428 | 69 | 5 | 0 | UA,WN,F9 |
| Dec 2024 | 451 | 101 | 11 | 0 | F9,UA,WN |
| Nov 2024 | 457 | 84 | 4 | 0 | UA,WN,F9 |
| Oct 2024 | 495 | 128 | 5 | 0 | UA,WN,F9 |
| Sep 2024 | 459 | 66 | 0 | 0 | WN,UA,F9 |
| Aug 2024 | 481 | 113 | 4 | 3 | F9,WN,UA |
| Jul 2024 | 499 | 151 | 3 | 1 | F9,UA,WN |
| Jun 2024 | 516 | 142 | 7 | 2 | F9,UA,WN |
| May 2024 | 496 | 140 | 4 | 3 | F9,UA,WN |
| Apr 2024 | 465 | 89 | 2 | 0 | F9,UA,WN |
| Mar 2024 | 462 | 61 | 6 | 0 | F9,UA,WN |
| Feb 2024 | 398 | 67 | 1 | 1 | F9,UA,WN |
| Jan 2024 | 409 | 55 | 26 | 0 | F9,WN,UA |
Cancellation Rate
1.1%
123 of 11,116 flights
Diversion Rate
0.3%
36 of 11,116 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SAN - San Diego
Full on-time, delay-cause, and seasonal performance for San Diego, CA.
Origin airport →DEN - Denver
Full on-time, delay-cause, and seasonal performance for Denver, CO.
Destination airport →Compare the two airports
See SAN and DEN side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SAN–DEN.
Routes with a similar on-time rate
What the Data Says About SAN to DEN
Bureau of Transportation Statistics records show San Diego to Denver (SAN to DEN) running a 82.1% on-time rate over 28,968 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 66.0 minutes. The 853-mile corridor is served by 13 carriers, and over the last 24 months 1.1% of 11,116 flights were cancelled, 0.3% diverted.
The monthly split is wide on this route: Mar 2024 posted the strongest performance at 87% on-time, while Jun 2025 came in at just 64% - a 23-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from SAN to DEN? ▼
What is the cancellation rate for SAN to DEN? ▼
How far is the flight from SAN to DEN? ▼
When is the best time to fly from SAN to DEN? ▼
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.