Route
SFO → SAN
San Francisco International Airport San Diego International Airport
Alerts at SFO and SAN
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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
- 62.2%
- Less than 15 minutes late
- Cancelled
- 1.2%
- Of scheduled flights
- Average delay when late
- 63 min
- Flights arriving 15+ minutes late
- Flights tracked
- 6,723
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 49%
- Air traffic control & airport 33%
- Airline (crew, maintenance, cleaning) 17%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 74.3% | 582 |
| October 2025 | 65.1% | 659 |
| November 2025 | 63.2% | 564 |
| December 2025 | 61.2% | 486 |
| January 2026 | 80.3% | 504 |
| February 2026 | 72.5% | 442 |
| March 2026 | 77.2% | 491 |
| April 2026 | 62.1% | 514 |
| May 2026 | 55.9% | 529 |
| June 2026 | 54.1% | 602 |
| July 2026 | 50.1% | 655 |
| August 2026 | 42.3% | 695 |
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 |
|---|---|---|---|---|
| United Airlines | 2,666 | 72.8% | 0.3% | 58 min |
| Southwest Airlines | 2,070 | 47.9% | 1.4% | 65 min |
| SkyWest Airlines | 1,442 | 60.1% | 2.4% | 62 min |
| Alaska Airlines | 331 | 82.9% | 1.2% | 51 min |
| Frontier Airlines | 214 | 48.3% | 4.2% | 97 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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UA2177
35% late · 310 flights
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OO3490
39% late · 234 flights
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UA444
22% late · 197 flights
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UA2142
27% late · 196 flights
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UA1434
33% late · 184 flights
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F94306
52% late · 171 flights
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OO3473
44% late · 162 flights
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UA1712
5% late · 162 flights
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UA1577
27% late · 156 flights
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OO3482
48% late · 127 flights
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UA2391
23% late · 125 flights
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UA1483
16% late · 120 flights
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OO3479
43% late · 118 flights
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UA1863
25% late · 118 flights
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OO3376
38% late · 108 flights
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UA2861
22% late · 108 flights
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OO3455
27% late · 103 flights
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UA1257
39% late · 103 flights
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UA1561
48% late · 102 flights
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OO3452
39% late · 87 flights
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UA1980
6% late · 86 flights
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UA1343
36% late · 81 flights
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UA1336
35% late · 77 flights
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UA1668
24% late · 77 flights
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