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ATIS Alerts Smart Flight Search

Find the flight least likely to be delayed

Beta

We rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.

STS → LAX

Santa Rosa to Los Angeles: 688 nonstop flights a year

On time (12 months)

83%

Cancelled

2.8%

avg delay 13 min

Best time to leave

Noon to 3 PM

98% on time vs 74% 6 to 9 PM

Most reliable airline

SkyWest

80% chance on time

Check STS to LAX fares

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

Best trips

5 nonstop, 10 with 1 connection. Best overall weighs the chance you arrive on time as booked, connection odds, travel time and separate tickets.

  1. Best overall#1 · Nonstop · 1h 39m

    12:10 PM → 1:49 PM

    89%

    arrive on time

    12:10 PM STS → 1:49 PM LAX1h 39m

    SkyWest 3008 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 4–10 yrs old
    91% on time · 2.5% cancel
    Find 12:10 PM flight fares Opens this date on Aviasales

  2. #2 · Nonstop · 1h 39m

    7:59 AM → 9:38 AM

    84%

    arrive on time

    7:59 AM STS → 9:38 AM LAX1h 39m

    Alaska 781

    Boeing 737-800 · 15–20 yrs old
    86% on time · 2.5% cancel
    Find Alaska 781 fares Opens this date on Aviasales

  3. #3 · Nonstop · 1h 47m

    7:05 AM → 9:01 AM

    82%

    arrive on time

    7:05 AM STS → 9:01 AM LAX1h 47m

    SkyWest 3366 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 4–11 yrs old
    88% on time · 6.7% cancel
    Find 7:05 AM flight fares Opens this date on Aviasales

  4. #4 · Nonstop · 1h 38m

    7:53 PM → 9:31 PM

    76%

    arrive on time

    7:53 PM STS → 9:31 PM LAX1h 38m

    SkyWest 3414 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 4–10 yrs old
    77% on time · 1.6% cancel
    Find 7:53 PM flight fares Opens this date on Aviasales

  5. #5 · Nonstop · 1h 40m

    5:21 PM → 7:01 PM

    72%

    arrive on time

    5:21 PM STS → 7:01 PM LAX1h 40m

    SkyWest 3466 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 4–10 yrs old
    73% on time · 1.6% cancel
    Find 5:21 PM flight fares Opens this date on Aviasales

  6. #6 · 1 connection · 6h 25m · one ticket

    9:50 AM → 4:15 PM

    96%

    connections made

    85%

    arrive on time

    9:50 AM STS → 11:34 AM SAN1h 44m

    SkyWest 3103 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 4–11 yrs old
    78% on time · 2.2% cancel
    Connect in SAN · 3h 41m · 99% chance to make it · same ticket: the airline rebooks you if you miss it

    3:15 PM SAN → 4:15 PM LAX1h 00m

    SkyWest 3602 · sold as United Express, Delta Connection, American Eagle or Alaska · also flew as 3501

    Embraer E175 · 6–8 yrs old
    88% on time · 0.8% cancel
    Find this one-ticket trip Look for SkyWest 3103 + SkyWest 3602 on Aviasales

  7. #7 · 1 connection · 5h 02m · one ticket

    7:00 AM → 12:11 PM

    90%

    connections made

    81%

    arrive on time

    7:00 AM STS → 8:58 AM SAN1h 49m

    SkyWest 3315 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 4–11 yrs old
    85% on time · 5.9% cancel
    Connect in SAN · 2h 03m · 96% chance to make it · same ticket: the airline rebooks you if you miss it

    11:01 AM SAN → 12:11 PM LAX1h 10m

    SkyWest 5384 · sold as United Express, Delta Connection, American Eagle or Alaska · also flew as 3716

    Embraer E175 · 6–8 yrs old
    90% on time · 0.5% cancel
    Find this one-ticket trip Look for SkyWest 3315 + SkyWest 5384 on Aviasales

  8. #8 · 1 connection · 5h 24m · one ticket

    10:51 AM → 4:15 PM

    93%

    connections made

    82%

    arrive on time

    10:51 AM STS → 12:35 PM SAN1h 44m

    SkyWest 3420 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 4–10 yrs old
    68% on time · 2.5% cancel
    Connect in SAN · 2h 40m · 96% chance to make it · same ticket: the airline rebooks you if you miss it

    3:15 PM SAN → 4:15 PM LAX1h 00m

    SkyWest 3602 · sold as United Express, Delta Connection, American Eagle or Alaska · also flew as 3501

    Embraer E175 · 6–8 yrs old
    88% on time · 0.8% cancel
    Find this one-ticket trip Look for SkyWest 3420 + SkyWest 3602 on Aviasales

  9. #9 · 1 connection · 6h 03m · one ticket

    10:51 AM → 4:54 PM

    94%

    connections made

    81%

    arrive on time

    10:51 AM STS → 12:35 PM SAN1h 44m

    SkyWest 3420 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 4–10 yrs old
    68% on time · 2.5% cancel
    Connect in SAN · 3h 10m · 97% chance to make it · same ticket: the airline rebooks you if you miss it

    3:45 PM SAN → 4:54 PM LAX1h 09m

    SkyWest 4150 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 4–10 yrs old
    86% on time · 0.8% cancel
    Find this one-ticket trip Look for SkyWest 3420 + SkyWest 4150 on Aviasales

  10. #10 · 1 connection · 6h 11m · separate tickets

    6:00 AM → 12:11 PM

    97%

    connections made

    87%

    arrive on time

    6:00 AM STS → 7:45 AM SAN1h 45m

    Southwest 4140

    Boeing 737-700 · 15–23 yrs old
    93% on time · 1.2% cancel
    Connect in SAN · 3h 16m · 99% chance to make it · separate tickets: collect and re-check bags, re-clear security; if you miss it the second airline does not have to rebook you

    11:01 AM SAN → 12:11 PM LAX1h 10m

    SkyWest 5384 · sold as United Express, Delta Connection, American Eagle or Alaska · also flew as 3716

    Embraer E175 · 6–8 yrs old
    90% on time · 0.5% cancel
    Flight 1: find Southwest 4140 (STS–SAN) Flight 2: find SkyWest 5384 (SAN–LAX) Book each flight separately on Aviasales

Aircraft and ages come from the planes each flight number actually flew in the last 3 months of data (FAA registry build years); airlines can swap planes.

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)80%

    670 flights · 83% on time as flown · 2.8% cancel

On time by departure time

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

  • Before 9 AM89%

    325 flights · avg delay 9 min

  • Noon to 3 PM98%

    42 flights · avg delay 2 min

  • 3 to 6 PM75%

    73 flights · avg delay 20 min

  • 6 to 9 PM74%

    248 flights · avg delay 16 min

Best day: Saturday (88%). Worst: Friday (75%).

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