Flight OO3439
SkyWest Airlines flight OO3439
Looking for OO3439 in the air…
Alerts at this flight's airports
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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
San Diego (SAN) to Sacramento (SMF)
Historically, this flight arrives 15+ minutes late 24% of the time, and when it is late the delay averages 54 minutes. It was cancelled 1.1% of the time.
- On-time arrivals
- 75.7%
- Less than 15 minutes late
- Cancelled
- 1.1%
- Of scheduled flights
- Average delay when late
- 54 min
- Flights arriving 15+ minutes late
- Flights tracked
- 267
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 46%
- Air traffic control & airport 41%
- Airline (crew, maintenance, cleaning) 10%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sacramento (SMF) to San Diego (SAN)
Historically, this flight arrives 15+ minutes late 25% of the time, and when it is late the delay averages 51 minutes. It was cancelled 1.3% of the time.
- On-time arrivals
- 74.6%
- Less than 15 minutes late
- Cancelled
- 1.3%
- Of scheduled flights
- Average delay when late
- 51 min
- Flights arriving 15+ minutes late
- Flights tracked
- 228
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 53%
- Late-arriving aircraft 40%
- Airline (crew, maintenance, cleaning) 4%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Portland (PDX) to Seattle (SEA)
Historically, this flight arrives 15+ minutes late 24% of the time, and when it is late the delay averages 49 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 75.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 49 min
- Flights arriving 15+ minutes late
- Flights tracked
- 29
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 40%
- Extreme weather 22%
- Air traffic control & airport 20%
- Late-arriving aircraft 18%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 73.1% | 26 |
| October 2025 | 63.2% | 39 |
| November 2025 | 64.3% | 58 |
| December 2025 | 73.7% | 38 |
| January 2026 | 90.9% | 24 |
| February 2026 | 78.1% | 34 |
| March 2026 | 81.6% | 49 |
| April 2026 | 100.0% | 37 |
| May 2026 | 52.5% | 40 |
| June 2026 | 79.7% | 59 |
| July 2026 | 83.6% | 62 |
| August 2026 | 69.0% | 58 |
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