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Route on-time record

STS to PHX: most on-time flights and the best time to fly

Santa Rosa (Charles M. Schulz Sonoma County Airport) to Phoenix (Phoenix Sky Harbor International Airport). 693 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.3% were cancelled. The most reliable flight number was Envoy 3716 at 4:23 PM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

STS → PHX

Santa Rosa to Phoenix: 693 nonstop flights a year

On time (12 months)

78%

Cancelled

0.3%

avg delay 19 min

Best time to leave

No clear winner

Most reliable airline

Envoy

80% chance on time

Check STS to PHX fares

Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

  1. #1 · Envoy 3716 · sold as American Eagle

    4:23 PM → 6:31 PM2h 08m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    83%

    chance on time

    On time (history)
    87%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 87% of the time (30 flights, Jun 2025 to May 2026).
    • Never cancelled in 30 scheduled flights.
    • Lands inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (30 flights), so its score leans on the airline's record at this hour.

    Limited track record · 30 flights

    Find 4:23 PM flight fares Opens this date on Aviasales

  2. #2 · Envoy 4126 · sold as American Eagle

    12:56 PM → 3:05 PM2h 09m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    82%

    chance on time

    On time (history)
    85%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 85% of the time (53 flights, Jun 2025 to May 2026).
    • Never cancelled in 53 scheduled flights.
    • Lands inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (53 flights), so its score leans on the airline's record at this hour.

    Limited track record · 53 flights

    Find 12:56 PM flight fares Opens this date on Aviasales

  3. #3 · SkyWest 6459 · sold as United Express, Delta Connection, American Eagle or Alaska

    4:20 PM → 6:30 PM2h 10m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as SkyWest 6402; its record covers all of them.

    80%

    chance on time

    On time (history)
    83%
    Cancelled
    0.0%
    Avg arrival delay
    18 min
    • Arrived on time 83% of the time (48 flights, Jun 2025 to May 2026).
    • Never cancelled in 48 scheduled flights.
    • Lands inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (48 flights), so its score leans on the airline's record at this hour.

    Limited track record · 48 flights

    Find 4:20 PM flight fares Opens this date on Aviasales

  4. #4 · SkyWest 6448 · sold as United Express, Delta Connection, American Eagle or Alaska

    12:56 PM → 3:05 PM2h 09m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    77%

    chance on time

    On time (history)
    80%
    Cancelled
    0.0%
    Avg arrival delay
    13 min
    • Arrived on time 80% of the time (44 flights, Jun 2025 to May 2026).
    • Never cancelled in 44 scheduled flights.
    • Lands inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (44 flights), so its score leans on the airline's record at this hour.

    Limited track record · 44 flights

    Find 12:56 PM flight fares Opens this date on Aviasales

  5. #5 · SkyWest 6361 · sold as United Express, Delta Connection, American Eagle or Alaska

    1:03 PM → 3:14 PM2h 11m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    63%

    chance on time

    On time (history)
    36%
    Cancelled
    0.0%
    Avg arrival delay
    38 min
    • Arrived on time 36% of the time (11 flights, Jun 2025 to May 2026).
    • Lands inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
    • 51% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find 1:03 PM flight fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Envoy Air (sold as American Eagle)80%

    401 flights · 82% on time as flown · 0.4% cancel

  • American Airlines79%

    59 flights · 76% on time as flown · 0.2% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)74%

    233 flights · 73% on time as flown · 0.1% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Noon to 3 PM77%

    362 flights · avg delay 21 min

  • 3 to 6 PM80%

    330 flights · avg delay 14 min

Best day: Tuesday (85%). Worst: Friday (77%).

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

J
82
F
87
M
81
A
83
M
78
J
78
J
73
A
90
S
86
O
82
N
81
D
79

What delays this route

  • Late-arriving aircraft49%
  • Airline (crew, maintenance, boarding)37%
  • Air traffic control and airport volume12%
  • Severe weather2%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

Finding the most reliable connections from STS to PHX…

STS to PHX questions

Which airline is most on time from STS to PHX?
Envoy, with a season-adjusted 80% chance of operating and arriving on time over 401 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on STS to PHX?
July (73% on time); the best was August (90%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?
No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from STS

Live status: FAA delays and ground stops