Flight WN3809
Southwest Airlines flight WN3809
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Alerts at this flight's airports
St Louis (STL) to New Orleans (MSY)
Historically, this flight arrives 15+ minutes late 10% of the time, and when it is late the delay averages 76 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 90.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 76 min
- Flights arriving 15+ minutes late
- Flights tracked
- 50
- Scheduled flights in the period
What caused the delays
- Security 36%
- Late-arriving aircraft 31%
- Airline (crew, maintenance, cleaning) 29%
- Air traffic control & airport 4%
- Extreme weather 0%
Share of delay minutes airlines attributed to each cause (BTS).
Phoenix (PHX) to Los Angeles (LAX)
Historically, this flight arrives 15+ minutes late 50% of the time, and when it is late the delay averages 40 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 50.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 40 min
- Flights arriving 15+ minutes late
- Flights tracked
- 42
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 75%
- Airline (crew, maintenance, cleaning) 23%
- Air traffic control & airport 2%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Miami (MIA) to Kansas City (MCI)
Historically, this flight arrives 15+ minutes late 30% of the time, and when it is late the delay averages 70 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 69.7%
- Less than 15 minutes late
- Cancelled
- 0.0%
- 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 59%
- Airline (crew, maintenance, cleaning) 23%
- Air traffic control & airport 17%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (MDW) to Washington (DCA)
Historically, this flight arrives 15+ minutes late 39% of the time, and when it is late the delay averages 64 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 61.3%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 64 min
- Flights arriving 15+ minutes late
- Flights tracked
- 31
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 62%
- Air traffic control & airport 24%
- Airline (crew, maintenance, cleaning) 14%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Oakland (OAK) to Ontario (ONT)
Historically, this flight arrives 15+ minutes late 0% of the time. It was cancelled 0.0% of the time.
- 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
- 22
- Scheduled flights in the period
Milwaukee (MKE) to Tampa (TPA)
Only 18 flights on record, which is too few for reliable odds.
- On-time arrivals
- 58.8%
- Less than 15 minutes late
- Cancelled
- 5.6%
- Of scheduled flights
- Average delay when late
- 105 min
- Flights arriving 15+ minutes late
- Flights tracked
- 18
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 50%
- Airline (crew, maintenance, cleaning) 43%
- Air traffic control & airport 7%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
New Orleans (MSY) to Houston (HOU)
Only 14 flights on record, which is too few for reliable odds.
- On-time arrivals
- 92.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 204 min
- Flights arriving 15+ minutes late
- Flights tracked
- 14
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 91%
- Airline (crew, maintenance, cleaning) 9%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Milwaukee (MKE) to Washington (DCA)
Only 12 flights on record, which is too few for reliable odds.
- On-time arrivals
- 83.3%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 33 min
- Flights arriving 15+ minutes late
- Flights tracked
- 12
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 58%
- Late-arriving aircraft 26%
- Airline (crew, maintenance, cleaning) 16%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Myrtle Beach (MYR) to Nashville (BNA)
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
- 75 min
- Flights arriving 15+ minutes late
- Flights tracked
- 8
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 53%
- Late-arriving aircraft 45%
- Airline (crew, maintenance, cleaning) 1%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
St Louis (STL) to Boston (BOS)
Only 4 flights on record, which is too few for reliable odds.
- On-time arrivals
- 25.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 42 min
- Flights arriving 15+ minutes late
- Flights tracked
- 4
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 50%
- Late-arriving aircraft 32%
- Airline (crew, maintenance, cleaning) 18%
- 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 |
|---|---|---|
| October 2025 | 60.0% | 30 |
| November 2025 | 94.7% | 20 |
| December 2025 | 64.7% | 17 |
| January 2026 | 93.5% | 31 |
| February 2026 | 87.5% | 32 |
| March 2026 | 81.2% | 32 |
| April 2026 | 54.2% | 24 |
| May 2026 | 38.1% | 21 |
| June 2026 | 42.9% | 7 |
| July 2026 | 100.0% | 3 |
| August 2026 | 64.7% | 17 |
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