Route
TUS → SAN
Tucson International Airport San Diego International Airport
Alerts at TUS and SAN
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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
- 73.3%
- Less than 15 minutes late
- Cancelled
- 0.5%
- Of scheduled flights
- Average delay when late
- 59 min
- Flights arriving 15+ minutes late
- Flights tracked
- 663
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 53%
- Air traffic control & airport 34%
- Airline (crew, maintenance, cleaning) 12%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 78.7% | 47 |
| October 2025 | 71.4% | 56 |
| November 2025 | 81.1% | 54 |
| December 2025 | 77.2% | 57 |
| January 2026 | 85.2% | 56 |
| February 2026 | 84.6% | 52 |
| March 2026 | 74.1% | 58 |
| April 2026 | 73.2% | 56 |
| May 2026 | 69.6% | 56 |
| June 2026 | 75.0% | 56 |
| July 2026 | 63.2% | 58 |
| August 2026 | 49.1% | 57 |
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 | 663 | 73.3% | 0.5% | 59 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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WN4229
37% late · 59 flights
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WN4135
2% late · 58 flights
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WN4223
9% late · 53 flights
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WN4118
2% late · 49 flights
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WN2310
2% late · 45 flights
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WN2664
52% late · 42 flights
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WN2004
7% late · 28 flights
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WN2253
18% late · 28 flights
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WN3551
63% late · 27 flights
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WN199
52% late · 25 flights
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WN4399
52% late · 25 flights
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