Santa Rosa (STS) to Phoenix (PHX): On-Time Performance
Data through July 2026
Santa Rosa (STS) to Phoenix (PHX) effectively runs on two schedules. In September 2024, 97% of arrivals were on time; in June 2026 that fell to 58% — a 39-point seasonal swing. Across the full period the route averages 78% on-time against a national 78%.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 0.2%
- Flights/day
- 1.9
- last 12 months
- Duration
- 2h 7m
- scheduled
- Distance
- 699 mi
Best airline from STS to PHX
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Airmost reliable | 82% | 11 min | 0.3% | 696 |
| American Airlines | 77% | 18 min | 0.0% | 167 |
| SkyWest Airlines | 73% | 26 min | 0.2% | 446 |
Monthly on-time trend
Best time to fly from STS to PHX
Aim for departures around 4 p.m. (82% on-time); avoid 1 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 73% | 18 min |
| Tuesday | 83% | 15 min |
| Wednesday | 79% | 12 min |
| Thursday | 77% | 21 min |
| Friday | 74% | 18 min |
| Saturdaybest | 85% | 16 min |
| Sunday | 78% | 19 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft50%
- Airline operations35%
- National airspace system11%
- Weather3%
Frequently asked questions
- How often are flights from STS to PHX delayed?
- 22% of STS–PHX flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 17 minutes.
- Which airline is most reliable from STS to PHX?
- Envoy Air has the best on-time record on this route at 82%, based on 696 flights. 3 airlines flew STS–PHX frequently enough to compare in this period.
- What is the best time of day to fly from STS to PHX?
- Departures around 4 p.m. have the best record (82% on-time), while departures around 1 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from STS to PHX?
- The scheduled STS–PHX flight time averages 2h 7m over 699 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are STS to PHX flights cancelled?
- 0.2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from STS to PHX?
- June 2026 was the roughest month in this dataset, with only 58% of arrivals on time. The best was September 2024 at 97%. If your dates are flexible, that 39-point gap is worth planning around.
Explore related pages
More routes from STS
Other ways to fly to Phoenix (PHX)
Related guides
Based on 1,309 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.