Flight WN3515
Southwest Airlines flight WN3515
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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
Orlando (MCO) to Kansas City (MCI)
Historically, this flight arrives 15+ minutes late 8% of the time, and when it is late the delay averages 210 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 92.2%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 210 min
- Flights arriving 15+ minutes late
- Flights tracked
- 65
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 86%
- Late-arriving aircraft 12%
- Air traffic control & airport 3%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Providence/Warwick (PVD) to Washington (DCA)
Historically, this flight arrives 15+ minutes late 72% of the time, and when it is late the delay averages 72 minutes. It was cancelled 3.8% of the time.
- On-time arrivals
- 28.3%
- Less than 15 minutes late
- Cancelled
- 3.8%
- Of scheduled flights
- Average delay when late
- 72 min
- Flights arriving 15+ minutes late
- Flights tracked
- 52
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 54%
- Late-arriving aircraft 35%
- Airline (crew, maintenance, cleaning) 11%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (MDW) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 47% of the time, and when it is late the delay averages 70 minutes. It was cancelled 3.0% of the time.
- On-time arrivals
- 53.1%
- Less than 15 minutes late
- Cancelled
- 3.0%
- Of scheduled flights
- Average delay when late
- 70 min
- Flights arriving 15+ minutes late
- Flights tracked
- 33
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 52%
- Airline (crew, maintenance, cleaning) 27%
- Air traffic control & airport 21%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Kansas City (MCI) to Washington (DCA)
Historically, this flight arrives 15+ minutes late 19% of the time, and when it is late the delay averages 65 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 81.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 65 min
- Flights arriving 15+ minutes late
- Flights tracked
- 27
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 72%
- Air traffic control & airport 25%
- Airline (crew, maintenance, cleaning) 3%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Las Vegas (LAS) to San Diego (SAN)
Only 18 flights on record, which is too few for reliable odds.
- On-time arrivals
- 77.8%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 57 min
- Flights arriving 15+ minutes late
- Flights tracked
- 18
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 80%
- Airline (crew, maintenance, cleaning) 20%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Lubbock (LBB) to Austin (AUS)
Only 17 flights on record, which is too few for reliable odds.
- On-time arrivals
- 88.2%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 23 min
- Flights arriving 15+ minutes late
- Flights tracked
- 17
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 61%
- Late-arriving aircraft 39%
- Airline (crew, maintenance, cleaning) 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sacramento (SMF) to Long Beach (LGB)
Only 12 flights on record, which is too few for reliable odds.
- On-time arrivals
- 50.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 46 min
- Flights arriving 15+ minutes late
- Flights tracked
- 12
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 62%
- Airline (crew, maintenance, cleaning) 36%
- Air traffic control & airport 2%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Savannah (SAV) to St Louis (STL)
Only 8 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
- 58 min
- Flights arriving 15+ minutes late
- Flights tracked
- 8
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 100%
- Airline (crew, maintenance, cleaning) 0%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
BWI → PBI
Only 1 flight on record, which is too few for reliable odds.
- On-time arrivals
- 100.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- —
- Flights arriving 15+ minutes late
- Flights tracked
- 1
- Scheduled flights in the period
Chicago (MDW) to Nashville (BNA)
Only 1 flight on record, which is too few for reliable odds.
- On-time arrivals
- 100.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- —
- Flights arriving 15+ minutes late
- Flights tracked
- 1
- Scheduled flights in the period
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 80.8% | 26 |
| October 2025 | 88.9% | 18 |
| November 2025 | 96.4% | 28 |
| December 2025 | 93.3% | 31 |
| January 2026 | 60.0% | 5 |
| February 2026 | 100.0% | 1 |
| March 2026 | 57.7% | 27 |
| April 2026 | 57.1% | 14 |
| May 2026 | 77.8% | 9 |
| June 2026 | 31.8% | 26 |
| July 2026 | 36.0% | 27 |
| August 2026 | 54.5% | 22 |
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