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Route · PDX → STS · 2020–2025 BTS data

Portland to Santa Rosa

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PDX to STS (Portland to Santa Rosa) ranks #4313 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

82.8%
On-time
+3.8 pts
vs US avg
59 min
Delay when late
1,266
Flights
#4313 of 4927
Corpus placement

Cancelled

0.8%

Best Month

Sep 2025 90%

Worst Month

Nov 2025 71%

Distance

489 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 44 14 2 5 OO
Nov 2025 58 17 0 0 OO
Oct 2025 36 8 0 1 OO
Sep 2025 60 6 0 2 OO
Aug 2025 43 8 0 0 OO
Jul 2025 31 6 0 0 OO
Jun 2025 41 14 0 0 OO
May 2025 62 12 0 0 OO
Apr 2025 39 15 0 0 OO
Mar 2025 30 4 0 0 OO
Sep 2024 30 3 0 0 OO
Apr 2024 34 6 0 0 OO
Mar 2024 42 8 0 0 OO
Jan 2024 31 7 4 0 OO
May 2023 31 2 0 0 OO
Oct 2022 31 4 0 0 OO,QX
Sep 2022 30 10 0 0 OO,QX
Aug 2022 31 2 0 0 OO,QX
Jul 2022 31 3 0 0 QX
Jun 2022 30 1 0 0 OO,QX
May 2022 31 5 0 0 OO,QX
Apr 2022 30 3 0 0 QX
Mar 2022 31 6 0 0 QX
Jan 2022 32 2 1 0 OO,QX

PDX–STS seasonal on-time pattern

Best: July (89.2%) · weakest: November (72.5%)

70%75%80%85%90%95% JanMarAprMayJunJulAugSepOctNovDec 77.8%

Strongest calendar month

July

89.2% on-time · ~31 flights/mo

Busiest calendar month

November

~51 flights/mo avg

Weakest calendar month

November

72.5% on-time · ~51 flights/mo

Cancellation Rate

0.8%

7 of 889 flights

Diversion Rate

0.9%

8 of 889 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

PDX - Portland

Full on-time, delay-cause, and seasonal performance for Portland, OR.

PDX on-time profile

STS - Santa Rosa

Full on-time, delay-cause, and seasonal performance for Santa Rosa, CA.

STS on-time profile

Compare the two airports

See PDX and STS side by side on delays, cancellations, and reliability.

Compare PDX vs STS

Origin-hub reliability standing

Mid-pack among PDX departures

From PDX, this corridor sits with 17 other 75–85% on-time routes out of 44 tracked departures, not the hub's reliability leaders (26 at ≥85%) and not the softest ( 1 below 75%). Destination: Santa Rosa · fleet on-time rank #2044 of 4927.

What the Data Says About PDX to STS

Bureau of Transportation Statistics records show Portland to Santa Rosa (PDX to STS) running a 82.8% on-time rate over 1,266 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 58.7 minutes. The 489-mile corridor is served by 3 carriers, and over the last 24 months 0.8% of 889 flights were cancelled, 0.9% diverted.

The monthly split is wide on this route: Sep 2025 posted the strongest performance at 90% on-time, while Nov 2025 came in at just 71% - a 19-point swing worth factoring into travel timing.

On the multi-year calendar, PDX–STS peaks in July at 89.2% on-time while November carries the heaviest traffic (~51 flights per month) ; the softest month is November at 72.5%, a 16.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does PDX to STS rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, PDX to STS ranks #4313 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from PDX to STS? ▼
Flights from Portland to Santa Rosa have a 82.8% on-time rate based on 1,266 flights. The average delay is 58.7 minutes. The best recent month was Sep 2025 with 90% on-time.
What is the cancellation rate for PDX to STS? ▼
Over the last 24 months, 0.8% of flights on this route were cancelled (7 of 889 flights) and 0.9% were diverted.
How far is the flight from PDX to STS? ▼
The flight distance from Portland (PDX) to Santa Rosa (STS) is approximately 489 miles. This route is served by 3 carriers.
When is the best time to fly from PDX to STS? ▼
The best recent month for on-time performance was Sep 2025 (90% on-time). The worst was Nov 2025 (71% on-time). Consider booking during months with historically better performance.

Airports on this route

PDX Airport

Portland
STS Airport

Santa Rosa
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using PDX–STS data

PDX–STS runs 3.8 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare PDX and STS airport profiles: delay causes and top routes differ even on the same corridor. PDX airport
  • If your dates flex, July (89.2% on-time) beats November (72.5%) on this corridor. Seasonal chart
  • 4 other routes post a similar 82.8% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.