Route
SAN → STS
San Diego International Airport Charles M. Schulz Sonoma County Airport
Alerts at SAN and STS
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Read the story →
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
- 77.5%
- Less than 15 minutes late
- Cancelled
- 3.5%
- Of scheduled flights
- Average delay when late
- 53 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,064
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 56%
- Air traffic control & airport 24%
- Airline (crew, maintenance, cleaning) 17%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 79.5% | 81 |
| October 2025 | 79.0% | 86 |
| November 2025 | 72.7% | 87 |
| December 2025 | 59.6% | 52 |
| January 2026 | 83.3% | 54 |
| February 2026 | 76.7% | 44 |
| March 2026 | 85.3% | 69 |
| April 2026 | 83.0% | 114 |
| May 2026 | 79.2% | 125 |
| June 2026 | 80.7% | 116 |
| July 2026 | 73.8% | 115 |
| August 2026 | 72.3% | 121 |
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 |
|---|---|---|---|---|
| SkyWest Airlines | 833 | 80.1% | 4.1% | 55 min |
| Southwest Airlines | 231 | 68.7% | 1.3% | 50 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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OO3302
22% late · 279 flights
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OO3445
16% late · 229 flights
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OO3409
30% late · 117 flights
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OO3233
9% late · 70 flights
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WN4191
46% late · 61 flights
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WN2019
45% late · 58 flights
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WN4773
8% late · 36 flights
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OO3314
33% late · 33 flights
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WN388
6% late · 31 flights
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OO3046
14% late · 30 flights
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OO3225
7% late · 28 flights
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OO3316
14% late · 24 flights
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