Route
SAN → SAT
San Diego International Airport San Antonio International Airport
Alerts at SAN and SAT
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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
- 68.0%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 57 min
- Flights arriving 15+ minutes late
- Flights tracked
- 611
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 77%
- Airline (crew, maintenance, cleaning) 16%
- Air traffic control & airport 7%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 83.6% | 56 |
| October 2025 | 68.4% | 57 |
| November 2025 | 74.5% | 56 |
| December 2025 | 73.3% | 60 |
| January 2026 | 73.7% | 19 |
| February 2026 | 78.9% | 19 |
| March 2026 | 65.4% | 52 |
| April 2026 | 83.9% | 56 |
| May 2026 | 61.4% | 57 |
| June 2026 | 56.9% | 60 |
| July 2026 | 58.3% | 61 |
| August 2026 | 50.0% | 58 |
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 | 611 | 68.0% | 0.7% | 57 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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WN4518
32% late · 64 flights
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WN3530
69% late · 61 flights
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WN4111
47% late · 58 flights
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WN2499
13% late · 52 flights
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WN4109
14% late · 49 flights
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WN3901
29% late · 42 flights
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WN4376
36% late · 33 flights
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WN4330
45% late · 31 flights
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WN3418
20% late · 30 flights
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WN1599
21% late · 28 flights
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WN2245
11% late · 27 flights
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WN4594
50% late · 20 flights
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