Flight WN4318
Southwest Airlines flight WN4318
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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
Las Vegas (LAS) to San Diego (SAN)
Historically, this flight arrives 15+ minutes late 52% of the time, and when it is late the delay averages 46 minutes. It was cancelled 1.7% of the time.
- On-time arrivals
- 48.3%
- Less than 15 minutes late
- Cancelled
- 1.7%
- Of scheduled flights
- Average delay when late
- 46 min
- Flights arriving 15+ minutes late
- Flights tracked
- 59
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 48%
- Late-arriving aircraft 38%
- Airline (crew, maintenance, cleaning) 14%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sacramento (SMF) to Burbank (BUR)
Historically, this flight arrives 15+ minutes late 2% of the time, and when it is late the delay averages 168 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 98.2%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 168 min
- Flights arriving 15+ minutes late
- Flights tracked
- 57
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 94%
- Airline (crew, maintenance, cleaning) 6%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
St Louis (STL) to Omaha (OMA)
Historically, this flight arrives 15+ minutes late 7% of the time, and when it is late the delay averages 142 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 92.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 142 min
- Flights arriving 15+ minutes late
- Flights tracked
- 42
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 93%
- Air traffic control & airport 5%
- Airline (crew, maintenance, cleaning) 2%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Diego (SAN) to Albuquerque (ABQ)
Historically, this flight arrives 15+ minutes late 16% of the time, and when it is late the delay averages 80 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 83.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 80 min
- Flights arriving 15+ minutes late
- Flights tracked
- 31
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 64%
- Airline (crew, maintenance, cleaning) 36%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Omaha (OMA) to Dallas (DAL)
Historically, this flight arrives 15+ minutes late 22% of the time, and when it is late the delay averages 77 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 77.8%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 77 min
- Flights arriving 15+ minutes late
- Flights tracked
- 27
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 77%
- Air traffic control & airport 18%
- Airline (crew, maintenance, cleaning) 5%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Dallas (DAL) to New Orleans (MSY)
Only 13 flights on record, which is too few for reliable odds.
- On-time arrivals
- 76.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 39 min
- Flights arriving 15+ minutes late
- Flights tracked
- 13
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 75%
- Airline (crew, maintenance, cleaning) 23%
- Air traffic control & airport 3%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Tucson (TUS) to Dallas (DAL)
Only 13 flights on record, which is too few for reliable odds.
- On-time arrivals
- 92.3%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 54 min
- Flights arriving 15+ minutes late
- Flights tracked
- 13
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 93%
- Airline (crew, maintenance, cleaning) 7%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Boise (BOI) to Denver (DEN)
Only 11 flights on record, which is too few for reliable odds.
- On-time arrivals
- 90.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 22 min
- Flights arriving 15+ minutes late
- Flights tracked
- 11
- 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).
New Orleans (MSY) to Washington (DCA)
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
- 45 min
- Flights arriving 15+ minutes late
- Flights tracked
- 5
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 56%
- Airline (crew, maintenance, cleaning) 21%
- Security 18%
- Air traffic control & airport 5%
- Extreme weather 0%
Share of delay minutes airlines attributed to each cause (BTS).
Kansas City (MCI) to Tampa (TPA)
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
Nashville (BNA) to Dallas (DAL)
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
Phoenix (PHX) to Oakland (OAK)
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 | 83.3% | 30 |
| October 2025 | 100.0% | 1 |
| November 2025 | 48.0% | 26 |
| December 2025 | 48.3% | 29 |
| January 2026 | 60.0% | 5 |
| February 2026 | 90.9% | 11 |
| March 2026 | 77.8% | 27 |
| April 2026 | 96.6% | 29 |
| May 2026 | 96.7% | 30 |
| June 2026 | 87.9% | 33 |
| July 2026 | 86.5% | 37 |
| August 2026 | 100.0% | 6 |
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