Flight OO4321
SkyWest Airlines flight OO4321
Looking for OO4321 in the air…
Salt Lake City (SLC) to St George (SGU)
Historically, this flight arrives 15+ minutes late 8% of the time, and when it is late the delay averages 82 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 92.1%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 82 min
- Flights arriving 15+ minutes late
- Flights tracked
- 355
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 75%
- Air traffic control & airport 16%
- Extreme weather 9%
- Late-arriving aircraft 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
St George (SGU) to Salt Lake City (SLC)
Historically, this flight arrives 15+ minutes late 13% of the time, and when it is late the delay averages 70 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 87.3%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 70 min
- Flights arriving 15+ minutes late
- Flights tracked
- 353
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 58%
- Extreme weather 33%
- Air traffic control & airport 9%
- Late-arriving aircraft 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 94.5% | 56 |
| October 2025 | 88.7% | 62 |
| November 2025 | 91.4% | 58 |
| December 2025 | 90.0% | 60 |
| January 2026 | 96.8% | 62 |
| February 2026 | 80.4% | 56 |
| March 2026 | 93.5% | 62 |
| April 2026 | 85.0% | 60 |
| May 2026 | 93.3% | 60 |
| June 2026 | 91.7% | 60 |
| July 2026 | 84.6% | 52 |
| August 2026 | 85.0% | 60 |
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