Flight WN4584
Southwest Airlines flight WN4584
Looking for WN4584 in the air…
Alerts at this flight's airports
Islip (ISP) to Baltimore (BWI)
Historically, this flight arrives 15+ minutes late 7% of the time, and when it is late the delay averages 134 minutes. It was cancelled 2.3% of the time.
- On-time arrivals
- 92.9%
- Less than 15 minutes late
- Cancelled
- 2.3%
- Of scheduled flights
- Average delay when late
- 134 min
- Flights arriving 15+ minutes late
- Flights tracked
- 43
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 43%
- Air traffic control & airport 36%
- Airline (crew, maintenance, cleaning) 21%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Francisco (SFO) to Los Angeles (LAX)
Historically, this flight arrives 15+ minutes late 82% of the time, and when it is late the delay averages 74 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 18.2%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 74 min
- Flights arriving 15+ minutes late
- Flights tracked
- 33
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 60%
- Airline (crew, maintenance, cleaning) 37%
- Air traffic control & airport 3%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Knoxville/Maryville (TYS) to Baltimore (BWI)
Historically, this flight arrives 15+ minutes late 6% of the time, and when it is late the delay averages 94 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 93.8%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 94 min
- Flights arriving 15+ minutes late
- Flights tracked
- 32
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 85%
- Extreme weather 15%
- Late-arriving aircraft 0%
- Air traffic control & airport 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Denver (DEN) to San Jose (SJC)
Historically, this flight arrives 15+ minutes late 18% of the time, and when it is late the delay averages 72 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 81.8%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 72 min
- Flights arriving 15+ minutes late
- Flights tracked
- 22
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 81%
- Airline (crew, maintenance, cleaning) 16%
- Air traffic control & airport 2%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
St Louis (STL) to Dallas (DAL)
Only 12 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
- 12
- Scheduled flights in the period
Las Vegas (LAS) to Spokane (GEG)
Only 5 flights on record, which is too few for reliable odds.
- On-time arrivals
- 40.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 43 min
- Flights arriving 15+ minutes late
- Flights tracked
- 5
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 49%
- Late-arriving aircraft 41%
- Air traffic control & airport 9%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Houston (HOU) to Savannah (SAV)
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
Los Angeles (LAX) to Reno (RNO)
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
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Show as table
| Month | On time | Flights |
|---|---|---|
| November 2025 | 66.7% | 3 |
| December 2025 | 0.0% | 2 |
| January 2026 | 100.0% | 6 |
| February 2026 | 73.3% | 15 |
| March 2026 | 92.9% | 28 |
| April 2026 | 45.0% | 20 |
| May 2026 | 22.2% | 18 |
| June 2026 | 85.7% | 21 |
| July 2026 | 95.5% | 23 |
| August 2026 | 92.3% | 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