Flight WN4443
Southwest Airlines flight WN4443
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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
Baltimore (BWI) to San Juan (SJU)
Historically, this flight arrives 15+ minutes late 28% of the time, and when it is late the delay averages 46 minutes. It was cancelled 1.0% of the time.
- On-time arrivals
- 72.0%
- Less than 15 minutes late
- Cancelled
- 1.0%
- Of scheduled flights
- Average delay when late
- 46 min
- Flights arriving 15+ minutes late
- Flights tracked
- 101
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 42%
- Air traffic control & airport 28%
- Late-arriving aircraft 27%
- Security 2%
- Extreme weather 2%
Share of delay minutes airlines attributed to each cause (BTS).
St Louis (STL) to Tampa (TPA)
Historically, this flight arrives 15+ minutes late 9% of the time, and when it is late the delay averages 96 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 90.6%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 96 min
- Flights arriving 15+ minutes late
- Flights tracked
- 64
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 37%
- Extreme weather 33%
- Airline (crew, maintenance, cleaning) 21%
- Air traffic control & airport 10%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Dallas (DAL) to Chicago (MDW)
Only 18 flights on record, which is too few for reliable odds.
- On-time arrivals
- 72.2%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 43 min
- Flights arriving 15+ minutes late
- Flights tracked
- 18
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 59%
- Late-arriving aircraft 41%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Diego (SAN) to Chicago (MDW)
Only 12 flights on record, which is too few for reliable odds.
- On-time arrivals
- 41.7%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 35 min
- Flights arriving 15+ minutes late
- Flights tracked
- 12
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 35%
- Late-arriving aircraft 35%
- Air traffic control & airport 31%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Grand Rapids (GRR) to Denver (DEN)
Only 4 flights on record, which is too few for reliable odds.
- On-time arrivals
- 75.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 146 min
- Flights arriving 15+ minutes late
- Flights tracked
- 4
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 99%
- Late-arriving aircraft 1%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 75.0% | 4 |
| October 2025 | 72.2% | 18 |
| November 2025 | 89.3% | 28 |
| December 2025 | 90.3% | 31 |
| January 2026 | 80.0% | 31 |
| February 2026 | 60.7% | 28 |
| March 2026 | 75.0% | 4 |
| June 2026 | 89.5% | 19 |
| July 2026 | 69.6% | 23 |
| August 2026 | 38.5% | 13 |
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