PDX to STS flight delays & on-time performance
Nonstop flights from Portland International Airport to Charles M. Schulz Sonoma County Airport · 489 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PDX or STS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Portland (PDX) to Santa Rosa (STS) arrived on time 84% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.5% were cancelled, and 5% arrived an hour or more late.
- Departures scheduled around 2pm did best (94% on time); around 7am did worst (77%).
- Wednesday was the most reliable day to fly (88% on time) and Sunday the least (77%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (37%).
Which airline is most on time from PDX 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 |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 85% | 0.3% | 11 min | 5.5% | 614 |
| Alaska Airlines | 80% | 3.8% | 13 min | 4.0% | 26 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am77%240 flights
- 2pm94%142 flights
- 3pm86%63 flights
- 5pm85%82 flights
- 6pm82%40 flights
- 9pm89%67 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday82%0.0% cancelled
- Tuesday87%0.0% cancelled
- Wednesday88%1.1% cancelled
- Thursday88%0.0% cancelled
- Friday86%2.0% cancelled
- Saturday84%0.0% cancelled
- Sunday77%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)37%
- Extreme weather32%
- Late-arriving aircraft20%
- Air traffic control & airport congestion11%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather67%
- Air traffic control & airport congestion33%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
PDX to STS: common questions
- How often are PDX to STS flights on time?
- 84% 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 Portland to Santa Rosa cancelled?
- 0.5% of scheduled flights were cancelled (3 of 640).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 65 min behind schedule on average, and 5.4% of flights were an hour or more late.
- How long is taxi time at PDX?
- Flights on this route spent 18 min taxiing from the gate to takeoff on average.
Related routes
Return trip: STS to PDX — 91% on time
More flights from Portland
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: PDX → STS, nonstop flights by US airlines that report to the DOT. How we calculate this.