PHX to STS flight delays & on-time performance
Nonstop flights from Phoenix Sky Harbor International Airport to Charles M. Schulz Sonoma County Airport · 699 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PHX or STS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Phoenix (PHX) to Santa Rosa (STS) arrived on time 81% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.3% were cancelled, and 3% arrived an hour or more late.
- Envoy Air was the most punctual airline here (85% on time); SkyWest Airlines was the least (74%).
- Departures scheduled around 11am did best (90% on time); around 10am did worst (68%).
- Saturday was the most reliable day to fly (86% on time) and Monday the least (74%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (45%).
Which airline is most on time from PHX to STS?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| American Airlines | 100% | 0.0% | 1 min | 0.0% | 6 |
| Envoy AirRegional airline operating American Eagle flights. | 85% | 0.5% | 6 min | 1.7% | 426 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 74% | 0.0% | 15 min | 5.8% | 261 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 10am68%238 flights
- 11am90%123 flights
- 1pm86%226 flights
- 2pm89%104 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday74%1.0% cancelled
- Tuesday79%0.0% cancelled
- Wednesday85%0.0% cancelled
- Thursday84%0.0% cancelled
- Friday82%1.0% cancelled
- Saturday86%0.0% cancelled
- Sunday78%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)45%
- Late-arriving aircraft31%
- Air traffic control & airport congestion21%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather50%
- Air traffic control & airport congestion50%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
PHX to STS: common questions
- How often are PHX to STS flights on time?
- 81% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Phoenix to Santa Rosa cancelled?
- 0.3% of scheduled flights were cancelled (2 of 693).
- How long are typical delays?
- Across all flights the average arrival delay was 10 min (early arrivals count as zero). Flights that were late arrived 44 min behind schedule on average, and 3.2% of flights were an hour or more late.
- How long is taxi time at PHX?
- Flights on this route spent 19 min taxiing from the gate to takeoff on average.
Related routes
Return trip: STS to PHX — 77% on time
More flights from Phoenix
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: PHX → STS, nonstop flights by US airlines that report to the DOT. How we calculate this.