Flight WN4531
Southwest Airlines flight WN4531
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Alerts at this flight's airports
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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
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Advisory Airport Closure SNA
Airport Closure at John Wayne Orange County International Airport (SNA): Reopens Nov 08 at 14:15 UTC.
Airport status
Dallas (DAL) to Indianapolis (IND)
Historically, this flight arrives 15+ minutes late 11% of the time, and when it is late the delay averages 92 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 88.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 92 min
- Flights arriving 15+ minutes late
- Flights tracked
- 61
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 82%
- Air traffic control & airport 12%
- Airline (crew, maintenance, cleaning) 5%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Dulles (IAD) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 19% of the time, and when it is late the delay averages 47 minutes. It was cancelled 1.9% of the time.
- On-time arrivals
- 80.8%
- Less than 15 minutes late
- Cancelled
- 1.9%
- Of scheduled flights
- Average delay when late
- 47 min
- Flights arriving 15+ minutes late
- Flights tracked
- 53
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 55%
- Airline (crew, maintenance, cleaning) 27%
- Late-arriving aircraft 18%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sarasota/Bradenton (SRQ) to St Louis (STL)
Historically, this flight arrives 15+ minutes late 12% of the time, and when it is late the delay averages 82 minutes. It was cancelled 3.0% of the time.
- On-time arrivals
- 87.5%
- Less than 15 minutes late
- Cancelled
- 3.0%
- Of scheduled flights
- Average delay when late
- 82 min
- Flights arriving 15+ minutes late
- Flights tracked
- 33
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 48%
- Airline (crew, maintenance, cleaning) 35%
- Air traffic control & airport 17%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sacramento (SMF) to San Diego (SAN)
Only 18 flights on record, which is too few for reliable odds.
- On-time arrivals
- 94.4%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 50 min
- Flights arriving 15+ minutes late
- Flights tracked
- 18
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 100%
- Late-arriving aircraft 0%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Dallas (DAL) to Santa Ana (SNA)
Only 17 flights on record, which is too few for reliable odds.
- On-time arrivals
- 70.6%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 62 min
- Flights arriving 15+ minutes late
- Flights tracked
- 17
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 58%
- Late-arriving aircraft 39%
- Airline (crew, maintenance, cleaning) 3%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Dallas (DAL) to El Paso (ELP)
Only 8 flights 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
- 8
- Scheduled flights in the period
Orlando (MCO) to Sarasota/Bradenton (SRQ)
Only 8 flights on record, which is too few for reliable odds.
- On-time arrivals
- 87.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 143 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).
St Louis (STL) to Nashville (BNA)
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
- 79 min
- Flights arriving 15+ minutes late
- Flights tracked
- 8
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 84%
- Air traffic control & airport 14%
- Airline (crew, maintenance, cleaning) 2%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Panama City Beach (ECP) to Dallas (DAL)
Only 7 flights 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
- 7
- Scheduled flights in the period
Baltimore (BWI) to Savannah (SAV)
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
- 62 min
- Flights arriving 15+ minutes late
- Flights tracked
- 4
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 77%
- Airline (crew, maintenance, cleaning) 23%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Tampa (TPA) to Dallas (DAL)
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
- 160 min
- Flights arriving 15+ minutes late
- Flights tracked
- 4
- Scheduled flights in the period
What caused the delays
- Extreme weather 86%
- Air traffic control & airport 14%
- Airline (crew, maintenance, cleaning) 0%
- Late-arriving aircraft 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Baltimore (BWI) to Houston (HOU)
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 | 70.6% | 17 |
| October 2025 | 94.4% | 18 |
| December 2025 | 100.0% | 1 |
| January 2026 | 71.4% | 22 |
| February 2026 | 85.2% | 27 |
| March 2026 | 86.4% | 45 |
| April 2026 | 90.9% | 11 |
| May 2026 | 100.0% | 4 |
| June 2026 | 88.9% | 27 |
| July 2026 | 90.3% | 31 |
| August 2026 | 84.2% | 19 |
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