Flight WN1551
Southwest Airlines flight WN1551
Looking for WN1551 in the air…
Denver (DEN) to Wichita (ICT)
Historically, this flight arrives 15+ minutes late 75% of the time, and when it is late the delay averages 70 minutes. It was cancelled 1.6% of the time.
- On-time arrivals
- 25.0%
- Less than 15 minutes late
- Cancelled
- 1.6%
- Of scheduled flights
- Average delay when late
- 70 min
- Flights arriving 15+ minutes late
- Flights tracked
- 61
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 65%
- Airline (crew, maintenance, cleaning) 21%
- Extreme weather 10%
- Air traffic control & airport 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Las Vegas (LAS) to Burbank (BUR)
Historically, this flight arrives 15+ minutes late 26% of the time, and when it is late the delay averages 56 minutes. It was cancelled 3.4% of the time.
- On-time arrivals
- 73.7%
- Less than 15 minutes late
- Cancelled
- 3.4%
- Of scheduled flights
- Average delay when late
- 56 min
- Flights arriving 15+ minutes late
- Flights tracked
- 59
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 60%
- Late-arriving aircraft 24%
- Airline (crew, maintenance, cleaning) 16%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Denver (DEN) to Phoenix (PHX)
Historically, this flight arrives 15+ minutes late 42% of the time, and when it is late the delay averages 55 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 58.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 55 min
- Flights arriving 15+ minutes late
- Flights tracked
- 50
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 68%
- Airline (crew, maintenance, cleaning) 26%
- Air traffic control & airport 6%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
PBI → BNA
Historically, this flight arrives 15+ minutes late 22% of the time, and when it is late the delay averages 42 minutes. It was cancelled 2.1% of the time.
- On-time arrivals
- 78.3%
- Less than 15 minutes late
- Cancelled
- 2.1%
- Of scheduled flights
- Average delay when late
- 42 min
- Flights arriving 15+ minutes late
- Flights tracked
- 47
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 79%
- Airline (crew, maintenance, cleaning) 17%
- Air traffic control & airport 4%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Rochester (ROC) to Baltimore (BWI)
Historically, this flight arrives 15+ minutes late 12% of the time, and when it is late the delay averages 105 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
- 105 min
- Flights arriving 15+ minutes late
- Flights tracked
- 33
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 85%
- Air traffic control & airport 15%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Honolulu, Oahu (HNL) to Kahului (OGG)
Historically, this flight arrives 15+ minutes late 7% of the time, and when it is late the delay averages 62 minutes. It was cancelled 3.6% of the time.
- On-time arrivals
- 92.6%
- Less than 15 minutes late
- Cancelled
- 3.6%
- Of scheduled flights
- Average delay when late
- 62 min
- Flights arriving 15+ minutes late
- Flights tracked
- 28
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 76%
- Airline (crew, maintenance, cleaning) 23%
- Air traffic control & airport 1%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Houston (HOU) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 46% of the time, and when it is late the delay averages 46 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 54.2%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 46 min
- Flights arriving 15+ minutes late
- Flights tracked
- 24
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 48%
- Airline (crew, maintenance, cleaning) 34%
- Air traffic control & airport 15%
- Extreme weather 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Seattle (SEA) to Las Vegas (LAS)
Historically, this flight arrives 15+ minutes late 22% of the time, and when it is late the delay averages 40 minutes. It was cancelled 4.2% of the time.
- On-time arrivals
- 78.3%
- Less than 15 minutes late
- Cancelled
- 4.2%
- Of scheduled flights
- Average delay when late
- 40 min
- Flights arriving 15+ minutes late
- Flights tracked
- 24
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 86%
- Airline (crew, maintenance, cleaning) 14%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
New York (LGA) to Chicago (MDW)
Only 19 flights on record, which is too few for reliable odds.
- On-time arrivals
- 89.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 93 min
- Flights arriving 15+ minutes late
- Flights tracked
- 19
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 79%
- Air traffic control & airport 21%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Dallas (DAL) to San Antonio (SAT)
Only 17 flights on record, which is too few for reliable odds.
- On-time arrivals
- 76.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 36 min
- Flights arriving 15+ minutes late
- Flights tracked
- 17
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 78%
- Airline (crew, maintenance, cleaning) 22%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Midland (MAF) to Las Vegas (LAS)
Only 16 flights on record, which is too few for reliable odds.
- On-time arrivals
- 93.3%
- Less than 15 minutes late
- Cancelled
- 6.2%
- Of scheduled flights
- Average delay when late
- 38 min
- Flights arriving 15+ minutes late
- Flights tracked
- 16
- 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).
Phoenix (PHX) to Birmingham (BHM)
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
- 89 min
- Flights arriving 15+ minutes late
- Flights tracked
- 13
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 62%
- Air traffic control & airport 29%
- Airline (crew, maintenance, cleaning) 9%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Long Beach (LGB) to Houston (HOU)
Only 11 flights on record, which is too few for reliable odds.
- On-time arrivals
- 54.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 39 min
- Flights arriving 15+ minutes late
- Flights tracked
- 11
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 79%
- Air traffic control & airport 15%
- Airline (crew, maintenance, cleaning) 6%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (MDW) to Phoenix (PHX)
Only 9 flights on record, which is too few for reliable odds.
- On-time arrivals
- 88.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 113 min
- Flights arriving 15+ minutes late
- Flights tracked
- 9
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 92%
- Airline (crew, maintenance, cleaning) 8%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Nashville (BNA) to Dallas (DAL)
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
- 47 min
- Flights arriving 15+ minutes late
- Flights tracked
- 4
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 57%
- Air traffic control & airport 23%
- Airline (crew, maintenance, cleaning) 20%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Nashville (BNA) to Chicago (MDW)
Only 4 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
- 4
- Scheduled flights in the period
Houston (HOU) to New Orleans (MSY)
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 | 73.5% | 34 |
| October 2025 | 96.7% | 30 |
| November 2025 | 77.1% | 51 |
| December 2025 | 77.3% | 45 |
| January 2026 | 77.4% | 32 |
| February 2026 | 71.4% | 28 |
| March 2026 | 80.0% | 31 |
| April 2026 | 67.6% | 37 |
| May 2026 | 48.7% | 39 |
| June 2026 | 30.0% | 31 |
| July 2026 | 32.3% | 31 |
| August 2026 | 83.3% | 31 |
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