Flight WN3939
Southwest Airlines flight WN3939
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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
Kahului (OGG) to Honolulu, Oahu (HNL)
Historically, this flight arrives 15+ minutes late 5% of the time, and when it is late the delay averages 66 minutes. It was cancelled 1.6% of the time.
- On-time arrivals
- 95.2%
- Less than 15 minutes late
- Cancelled
- 1.6%
- Of scheduled flights
- Average delay when late
- 66 min
- Flights arriving 15+ minutes late
- Flights tracked
- 63
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 88%
- Air traffic control & airport 12%
- Airline (crew, maintenance, cleaning) 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Diego (SAN) to Austin (AUS)
Historically, this flight arrives 15+ minutes late 13% of the time, and when it is late the delay averages 57 minutes. It was cancelled 1.8% of the time.
- On-time arrivals
- 87.0%
- Less than 15 minutes late
- Cancelled
- 1.8%
- Of scheduled flights
- Average delay when late
- 57 min
- Flights arriving 15+ minutes late
- Flights tracked
- 55
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 48%
- Airline (crew, maintenance, cleaning) 35%
- Air traffic control & airport 17%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Eugene (EUG) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 12% of the time, and when it is late the delay averages 85 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 88.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 85 min
- Flights arriving 15+ minutes late
- Flights tracked
- 26
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 46%
- Extreme weather 39%
- Late-arriving aircraft 12%
- Airline (crew, maintenance, cleaning) 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Diego (SAN) to Colorado Springs (COS)
Historically, this flight arrives 15+ minutes late 38% of the time, and when it is late the delay averages 40 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 62.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- 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
- Airline (crew, maintenance, cleaning) 58%
- Late-arriving aircraft 40%
- Air traffic control & airport 2%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Las Vegas (LAS) to Reno (RNO)
Only 18 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
- 29 min
- Flights arriving 15+ minutes late
- Flights tracked
- 18
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 98%
- Airline (crew, maintenance, cleaning) 2%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Nashville (BNA) to Charleston (CHS)
Only 16 flights on record, which is too few for reliable odds.
- On-time arrivals
- 56.2%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 68 min
- Flights arriving 15+ minutes late
- Flights tracked
- 16
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 51%
- Airline (crew, maintenance, cleaning) 33%
- Extreme weather 15%
- Air traffic control & airport 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Jose (SJC) to Eugene (EUG)
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
- 21 min
- Flights arriving 15+ minutes late
- Flights tracked
- 13
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 71%
- Late-arriving aircraft 29%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Los Angeles (LAX) to San Francisco (SFO)
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
Tampa (TPA) to Indianapolis (IND)
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
- 46 min
- Flights arriving 15+ minutes late
- Flights tracked
- 11
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 83%
- Airline (crew, maintenance, cleaning) 17%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Nashville (BNA) to Atlanta (ATL)
Only 9 flights on record, which is too few for reliable odds.
- On-time arrivals
- 22.2%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 99 min
- Flights arriving 15+ minutes late
- Flights tracked
- 9
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 51%
- Air traffic control & airport 21%
- Extreme weather 15%
- Airline (crew, maintenance, cleaning) 12%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Baltimore (BWI) to Tampa (TPA)
Only 8 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
- 44 min
- Flights arriving 15+ minutes late
- Flights tracked
- 8
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 43%
- Late-arriving aircraft 38%
- Air traffic control & airport 20%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Denver (DEN) to Sarasota/Bradenton (SRQ)
Only 8 flights on record, which is too few for reliable odds.
- On-time arrivals
- 87.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 114 min
- Flights arriving 15+ minutes late
- Flights tracked
- 8
- 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).
Orlando (MCO) to Denver (DEN)
Only 8 flights on record, which is too few for reliable odds.
- On-time arrivals
- 87.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 35 min
- Flights arriving 15+ minutes late
- Flights tracked
- 8
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 100%
- Airline (crew, maintenance, cleaning) 0%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Tampa (TPA) to Houston (HOU)
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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Headlines found by Google News; stories open on the publisher's site.
Show as table
| Month | On time | Flights |
|---|---|---|
| November 2025 | 100.0% | 27 |
| December 2025 | 93.5% | 31 |
| January 2026 | 90.0% | 31 |
| February 2026 | 80.0% | 25 |
| March 2026 | 94.6% | 37 |
| April 2026 | 76.7% | 30 |
| May 2026 | 67.7% | 31 |
| June 2026 | 63.2% | 19 |
| July 2026 | 50.0% | 16 |
| August 2026 | 92.0% | 25 |
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