Route
SAN → BWI
San Diego International Airport Baltimore/Washington International Thurgood Marshall Airport
Alerts at SAN and BWI
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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
- 76.6%
- Less than 15 minutes late
- Cancelled
- 1.7%
- Of scheduled flights
- Average delay when late
- 51 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,182
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 53%
- Airline (crew, maintenance, cleaning) 29%
- Air traffic control & airport 17%
- Security 1%
- Extreme weather 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 90.1% | 82 |
| October 2025 | 85.1% | 101 |
| November 2025 | 86.5% | 97 |
| December 2025 | 85.6% | 102 |
| January 2026 | 89.8% | 91 |
| February 2026 | 83.5% | 80 |
| March 2026 | 73.0% | 105 |
| April 2026 | 70.9% | 103 |
| May 2026 | 76.2% | 106 |
| June 2026 | 63.4% | 103 |
| July 2026 | 58.4% | 106 |
| August 2026 | 63.7% | 106 |
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 | 1,182 | 76.6% | 1.7% | 51 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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WN4212
6% late · 64 flights
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WN3486
35% late · 61 flights
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WN3896
18% late · 60 flights
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WN1320
19% late · 58 flights
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WN2114
47% late · 58 flights
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WN3380
4% late · 58 flights
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WN4058
12% late · 58 flights
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WN3382
9% late · 55 flights
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WN4171
23% late · 53 flights
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WN1806
14% late · 45 flights
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WN1053
15% late · 42 flights
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WN4148
80% late · 35 flights
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WN277
53% late · 33 flights
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WN3517
12% late · 33 flights
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WN3245
22% late · 32 flights
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WN4182
3% late · 31 flights
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WN429
3% late · 31 flights
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WN3406
11% late · 28 flights
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WN4424
88% late · 28 flights
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WN3390
38% late · 27 flights
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WN2454
0% late · 25 flights
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WN2743
33% late · 24 flights
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WN3404
8% late · 24 flights
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WN1926
4% late · 23 flights
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