Route · DEN → SAN · 2020–2025 BTS data
Denver to San Diego
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), DEN to SAN (Denver to San Diego) ranks #144 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 78%
- On-time
- -1 pts
- vs US avg
- 60 min
- Delay when late
- 28,912
- Flights
- #144 of 4927
- Corpus placement
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 |
DEN–SAN seasonal on-time pattern
Best: November (83.7%) · weakest: June (70.2%)
Strongest calendar month
November
83.7% on-time · ~416 flights/mo
Busiest calendar month
July
~432 flights/mo avg
Weakest calendar month
June
70.2% on-time · ~421 flights/mo
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.
DEN on-time profileSAN - San Diego
Full on-time, delay-cause, and seasonal performance for San Diego, CA.
SAN on-time profileCompare the two airports
See DEN and SAN side by side on delays, cancellations, and reliability.
Compare DEN vs SANOrigin-hub reliability standing
Mid-pack among DEN departures
From DEN, this corridor sits with 133 other 75–85% on-time routes out of 168 tracked departures, not the hub's reliability leaders (8 at ≥85%) and not the softest ( 27 below 75%). Destination: San Diego · fleet on-time rank #3836 of 4927.
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.
On the multi-year calendar, DEN–SAN peaks in November at 83.7% on-time while July carries the heaviest traffic (~432 flights per month) ; the softest month is June at 70.2%, a 13.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does DEN to SAN rank among US routes by traffic? ▼
How often are flights delayed from DEN to SAN? ▼
What is the cancellation rate for DEN to SAN? ▼
How far is the flight from DEN to SAN? ▼
When is the best time to fly from DEN to SAN? ▼
Airports on this route
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.
Using DEN–SAN data
DEN–SAN is mid-pack at 78% on-time; month and carrier mix move more than the corridor headline.
- Compare DEN and SAN airport profiles: delay causes and top routes differ even on the same corridor. DEN airport
- If your dates flex, November (83.7% on-time) beats June (70.2%) on this corridor. Seasonal chart
- 4 other routes post a similar 78% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.