Route
SAN → DEN
San Diego International Airport Denver International Airport
Alerts at SAN and DEN
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Watch Ground Delay Program SAN
Ground Delay Program at San Diego International Airport (SAN): Average 37 minutes, up to 1 hour and 11 minutes
Reason: airport volume
Airport status
How punctual is this route?
- On-time arrivals
- 78.4%
- Less than 15 minutes late
- Cancelled
- 1.0%
- Of scheduled flights
- Average delay when late
- 68 min
- Flights arriving 15+ minutes late
- Flights tracked
- 6,134
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 49%
- Air traffic control & airport 29%
- Airline (crew, maintenance, cleaning) 19%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 78.1% | 411 |
| October 2025 | 80.7% | 531 |
| November 2025 | 83.3% | 529 |
| December 2025 | 73.0% | 537 |
| January 2026 | 86.6% | 500 |
| February 2026 | 84.1% | 460 |
| March 2026 | 81.9% | 538 |
| April 2026 | 86.3% | 507 |
| May 2026 | 82.3% | 515 |
| June 2026 | 71.5% | 525 |
| July 2026 | 71.0% | 544 |
| August 2026 | 63.9% | 537 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 2,404 | 71.0% | 0.7% | 62 min |
| United Airlines | 2,067 | 85.7% | 0.6% | 76 min |
| Frontier Airlines | 702 | 81.4% | 2.0% | 91 min |
| Alaska Airlines | 557 | 84.1% | 0.9% | 63 min |
| SkyWest Airlines | 404 | 72.1% | 3.5% | 56 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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UA2476
11% late · 365 flights
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UA682
26% late · 363 flights
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F92818
14% late · 362 flights
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UA1337
11% late · 275 flights
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UA519
14% late · 259 flights
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F94990
23% late · 203 flights
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UA1565
16% late · 169 flights
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AS1429
28% late · 158 flights
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AS1492
10% late · 152 flights
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F94928
23% late · 135 flights
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OO3046
17% late · 107 flights
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UA2270
8% late · 107 flights
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OO3021
17% late · 79 flights
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UA1483
19% late · 71 flights
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AS1618
3% late · 70 flights
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AS1619
13% late · 70 flights
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OO3012
66% late · 70 flights
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UA2368
6% late · 67 flights
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WN1655
44% late · 64 flights
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WN4216
16% late · 64 flights
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WN3496
75% late · 61 flights
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WN534
28% late · 60 flights
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WN2675
5% late · 58 flights
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WN2859
50% late · 58 flights
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