Route
PDX → STS
Portland International Airport Charles M. Schulz Sonoma County Airport
489 miles
Return route STS → PDX →
Alerts at PDX and STS
How punctual is this route?
- On-time arrivals
- 84.6%
- Less than 15 minutes late
- Cancelled
- 0.5%
- Of scheduled flights
- Average delay when late
- 70 min
- Flights arriving 15+ minutes late
- Flights tracked
- 653
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 38%
- Extreme weather 30%
- Late-arriving aircraft 21%
- Air traffic control & airport 11%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 89.7% | 60 |
| October 2025 | 77.1% | 36 |
| November 2025 | 70.7% | 58 |
| December 2025 | 62.2% | 44 |
| January 2026 | 76.1% | 48 |
| February 2026 | 85.1% | 48 |
| March 2026 | 88.5% | 62 |
| April 2026 | 90.0% | 50 |
| May 2026 | 92.9% | 70 |
| June 2026 | 92.1% | 63 |
| July 2026 | 91.2% | 58 |
| August 2026 | 85.7% | 56 |
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
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| SkyWest Airlines | 627 | 84.8% | 0.3% | 71 min |
| Alaska Airlines | 26 | 80.0% | 3.8% | 64 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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