Route · STS → PHX · 2020–2025 BTS data
Santa Rosa to Phoenix
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), STS to PHX (Santa Rosa to Phoenix) ranks #3429 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 83.6%
- On-time
- +4.6 pts
- vs US avg
- 93 min
- Delay when late
- 2,725
- Flights
- #3429 of 4927
- Corpus placement
Cancelled
0.3%
Best Month
Aug 2025 92%
Worst Month
Jul 2025 62%
Distance
699 mi
Carriers
10
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 48 | 12 | 0 | 0 | MQ |
| Nov 2025 | 51 | 12 | 1 | 0 | MQ |
| Oct 2025 | 61 | 19 | 0 | 0 | OO,MQ |
| Sep 2025 | 56 | 10 | 1 | 1 | MQ,OO |
| Aug 2025 | 62 | 5 | 0 | 0 | AA,OO,MQ |
| Jul 2025 | 61 | 23 | 0 | 0 | AA,OO |
| Jun 2025 | 60 | 17 | 0 | 0 | AA,OO,MQ |
| May 2025 | 62 | 8 | 0 | 0 | AA,MQ |
| Apr 2025 | 60 | 13 | 0 | 0 | MQ,AA |
| Mar 2025 | 62 | 14 | 0 | 1 | AA,OO,MQ |
| Feb 2025 | 44 | 8 | 0 | 0 | AA,OO,MQ |
| Jan 2025 | 33 | 3 | 0 | 0 | OO,MQ |
| Dec 2024 | 57 | 8 | 0 | 0 | MQ,OO |
| Nov 2024 | 54 | 12 | 0 | 0 | OO,MQ |
| Oct 2024 | 31 | 6 | 0 | 0 | MQ,OO |
| Sep 2024 | 30 | 1 | 0 | 0 | MQ |
| Aug 2024 | 31 | 5 | 0 | 0 | MQ,OO |
| Jul 2024 | 31 | 6 | 0 | 0 | MQ,OO |
| Jun 2024 | 30 | 6 | 0 | 0 | MQ,OO |
| May 2024 | 36 | 10 | 0 | 0 | MQ,OO |
| Apr 2024 | 57 | 7 | 0 | 0 | MQ,OO |
| Mar 2024 | 31 | 5 | 0 | 0 | OO |
| Jan 2024 | 38 | 7 | 0 | 0 | OO |
| Dec 2023 | 60 | 14 | 1 | 0 | OO,MQ |
STS–PHX seasonal on-time pattern
Best: August (88.7%) · weakest: July (79.2%)
Strongest calendar month
August
88.7% on-time · ~43 flights/mo
Busiest calendar month
October
~49 flights/mo avg
Weakest calendar month
July
79.2% on-time · ~42 flights/mo
Cancellation Rate
0.3%
3 of 1,146 flights
Diversion Rate
0.2%
2 of 1,146 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
STS - Santa Rosa
Full on-time, delay-cause, and seasonal performance for Santa Rosa, CA.
STS on-time profilePHX - Phoenix
Full on-time, delay-cause, and seasonal performance for Phoenix, AZ.
PHX on-time profileCompare the two airports
See STS and PHX side by side on delays, cancellations, and reliability.
Compare STS vs PHXOrigin-hub reliability standing
Mid-pack among STS departures
From STS, this corridor sits with 7 other 75–85% on-time routes out of 8 tracked departures, not the hub's reliability leaders (1 at ≥85%) and not the softest ( 0 below 75%). Destination: Phoenix · fleet on-time rank #1742 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to STS–PHX.
Routes with a similar on-time rate
What the Data Says About STS to PHX
Bureau of Transportation Statistics records show Santa Rosa to Phoenix (STS to PHX) running a 83.6% on-time rate over 2,725 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 92.5 minutes. The 699-mile corridor is served by 10 carriers, and over the last 24 months 0.3% of 1,146 flights were cancelled, 0.2% diverted.
The monthly split is wide on this route: Aug 2025 posted the strongest performance at 92% on-time, while Jul 2025 came in at just 62% - a 30-point swing worth factoring into travel timing.
On the multi-year calendar, STS–PHX peaks in August at 88.7% on-time while October carries the heaviest traffic (~49 flights per month) ; the softest month is July at 79.2%, a 9.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does STS to PHX rank among US routes by traffic? ▼
How often are flights delayed from STS to PHX? ▼
What is the cancellation rate for STS to PHX? ▼
How far is the flight from STS to PHX? ▼
When is the best time to fly from STS to PHX? ▼
Airports on this route
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 STS–PHX data
STS–PHX runs 4.6 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare STS and PHX airport profiles: delay causes and top routes differ even on the same corridor. STS airport
- If your dates flex, August (88.7% on-time) beats July (79.2%) on this corridor. Seasonal chart
- 4 other routes post a similar 83.6% 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.
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.