Flight WN3581
Southwest Airlines flight WN3581
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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
-
Advisory Coastal Flood Statement FLL
COASTAL FLOOD STATEMENT NOW IN EFFECT THROUGH THURSDAY EVENING
Weather
San Francisco (SFO) to Las Vegas (LAS)
Historically, this flight arrives 15+ minutes late 30% of the time, and when it is late the delay averages 65 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 70.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 65 min
- Flights arriving 15+ minutes late
- Flights tracked
- 44
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 40%
- Air traffic control & airport 36%
- Airline (crew, maintenance, cleaning) 24%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Fort Lauderdale (FLL) to Baltimore (BWI)
Historically, this flight arrives 15+ minutes late 48% of the time, and when it is late the delay averages 42 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 52.4%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 42 min
- Flights arriving 15+ minutes late
- Flights tracked
- 42
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 63%
- Airline (crew, maintenance, cleaning) 23%
- Air traffic control & airport 14%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Baltimore (BWI) to Phoenix (PHX)
Historically, this flight arrives 15+ minutes late 32% of the time, and when it is late the delay averages 40 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 67.6%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 40 min
- Flights arriving 15+ minutes late
- Flights tracked
- 34
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 74%
- Airline (crew, maintenance, cleaning) 17%
- Air traffic control & airport 9%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Las Vegas (LAS) to Kansas City (MCI)
Historically, this flight arrives 15+ minutes late 46% of the time, and when it is late the delay averages 42 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 53.6%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 42 min
- Flights arriving 15+ minutes late
- Flights tracked
- 28
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 85%
- Airline (crew, maintenance, cleaning) 12%
- Air traffic control & airport 4%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Juan (SJU) to Orlando (MCO)
Historically, this flight arrives 15+ minutes late 19% of the time, and when it is late the delay averages 72 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
- 72 min
- Flights arriving 15+ minutes late
- Flights tracked
- 27
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 82%
- Air traffic control & airport 9%
- Late-arriving aircraft 9%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Baltimore (BWI) to Los Angeles (LAX)
Historically, this flight arrives 15+ minutes late 67% of the time, and when it is late the delay averages 55 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 33.3%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 55 min
- Flights arriving 15+ minutes late
- Flights tracked
- 24
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 53%
- Airline (crew, maintenance, cleaning) 31%
- Air traffic control & airport 14%
- Security 2%
- Extreme weather 0%
Share of delay minutes airlines attributed to each cause (BTS).
Las Vegas (LAS) to Louisville (SDF)
Historically, this flight arrives 15+ minutes late 43% of the time, and when it is late the delay averages 67 minutes. It was cancelled 4.2% of the time.
- On-time arrivals
- 56.5%
- Less than 15 minutes late
- Cancelled
- 4.2%
- Of scheduled flights
- Average delay when late
- 67 min
- Flights arriving 15+ minutes late
- Flights tracked
- 24
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 86%
- Airline (crew, maintenance, cleaning) 9%
- Air traffic control & airport 6%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Phoenix (PHX) to San Jose (SJC)
Historically, this flight arrives 15+ minutes late 5% of the time, and when it is late the delay averages 100 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 95.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 100 min
- Flights arriving 15+ minutes late
- Flights tracked
- 20
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 85%
- Late-arriving aircraft 8%
- Air traffic control & airport 8%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Orlando (MCO) to Houston (HOU)
Only 13 flights on record, which is too few for reliable odds.
- On-time arrivals
- 84.6%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 30 min
- Flights arriving 15+ minutes late
- Flights tracked
- 13
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 100%
- Airline (crew, maintenance, cleaning) 0%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Antonio (SAT) to Orlando (MCO)
Only 9 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
- 37 min
- Flights arriving 15+ minutes late
- Flights tracked
- 9
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 80%
- Airline (crew, maintenance, cleaning) 20%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Baltimore (BWI) to Albuquerque (ABQ)
Only 8 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
- 50 min
- Flights arriving 15+ minutes late
- Flights tracked
- 8
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 57%
- Airline (crew, maintenance, cleaning) 36%
- Air traffic control & airport 7%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sarasota/Bradenton (SRQ) to Baltimore (BWI)
Only 8 flights on record, which is too few for reliable odds.
- On-time arrivals
- 62.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 77 min
- Flights arriving 15+ minutes late
- Flights tracked
- 8
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 61%
- Late-arriving aircraft 39%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Birmingham (BHM) to Orlando (MCO)
Only 5 flights on record, which is too few for reliable odds.
- On-time arrivals
- 20.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 91 min
- Flights arriving 15+ minutes late
- Flights tracked
- 5
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 48%
- Air traffic control & airport 40%
- Extreme weather 7%
- Airline (crew, maintenance, cleaning) 5%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Boise (BOI) to Las Vegas (LAS)
Only 5 flights on record, which is too few for reliable odds.
- On-time arrivals
- 60.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 27 min
- Flights arriving 15+ minutes late
- Flights tracked
- 5
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 62%
- Late-arriving aircraft 38%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Dallas (DAL) to Birmingham (BHM)
Only 5 flights on record, which is too few for reliable odds.
- On-time arrivals
- 0.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 37 min
- Flights arriving 15+ minutes late
- Flights tracked
- 5
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 68%
- Late-arriving aircraft 24%
- Airline (crew, maintenance, cleaning) 8%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Denver (DEN) to Houston (HOU)
Only 4 flights on record, which is too few for reliable odds.
- On-time arrivals
- 0.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 52 min
- Flights arriving 15+ minutes late
- Flights tracked
- 4
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 75%
- Airline (crew, maintenance, cleaning) 25%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Las Vegas (LAS) to Houston (HOU)
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
- 27 min
- Flights arriving 15+ minutes late
- Flights tracked
- 4
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 67%
- Late-arriving aircraft 27%
- Air traffic control & airport 7%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (MDW) to Louisville (SDF)
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
- 17 min
- Flights arriving 15+ minutes late
- Flights tracked
- 4
- 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).
Memphis (MEM) to Denver (DEN)
Only 4 flights on record, which is too few for reliable odds.
- On-time arrivals
- 0.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 114 min
- Flights arriving 15+ minutes late
- Flights tracked
- 4
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 92%
- Late-arriving aircraft 8%
- Airline (crew, maintenance, cleaning) 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Las Vegas (LAS) to Fresno (FAT)
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
San Diego (SAN) to Austin (AUS)
Only 1 flight on record, which is too few for reliable odds.
- On-time arrivals
- 0.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 44 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 100%
- Airline (crew, maintenance, cleaning) 0%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
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Headlines found by Google News; stories open on the publisher's site.
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 81.4% | 43 |
| October 2025 | 100.0% | 2 |
| November 2025 | 70.6% | 35 |
| December 2025 | 62.9% | 35 |
| January 2026 | 33.3% | 3 |
| March 2026 | 45.7% | 35 |
| April 2026 | 49.1% | 53 |
| May 2026 | 54.4% | 57 |
| June 2026 | 64.3% | 14 |
| July 2026 | 71.4% | 7 |
| August 2026 | 66.7% | 30 |
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