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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.

SEA → LAX

Seattle to Los Angeles: 7,410 nonstop flights a year

On time (12 months)

83%

Cancelled

0.9%

avg delay 11 min

Best time to leave

Before 9 AM

89% on time vs 73% after 9 PM

Most reliable airline

United

89% chance on time

Check SEA to LAX fares

Lowest nonstop fare seen in the next two months: $31 (Frontier 1178 on 2026-11-18). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Best trips

30 nonstop, 16 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 · 3h 01m

    12:22 PM → 3:23 PM

    94%

    arrive on time

    12:22 PM SEA → 3:23 PM LAX3h 01m

    SkyWest 5659 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 5–7 yrs old
    95% on time · 0.4% cancel
    Find 12:22 PM flight fares Opens this date on Aviasales

  2. #2 · Nonstop · 2h 47m

    7:15 AM → 10:02 AM

    92%

    arrive on time

    7:15 AM SEA → 10:02 AM LAX2h 47m

    Delta 1628

    Boeing 737-900ER or 737-800 · 7–26 yrs old
    93% on time · 0.2% cancel
    Find Delta 1628 fares Opens this date on Aviasales

  3. #3 · Nonstop · 2h 45m

    6:00 AM → 8:45 AM

    92%

    arrive on time

    6:00 AM SEA → 8:45 AM LAX2h 45m

    United 1298

    Boeing 737 MAX 9 · 0–5 yrs old
    92% on time · 0.4% cancel
    Find United 1298 fares Opens this date on Aviasales

  4. #4 · Nonstop · 2h 53m

    7:00 AM → 9:53 AM

    91%

    arrive on time

    7:00 AM SEA → 9:53 AM LAX2h 53m

    Alaska 797

    Boeing 737-900ER or 737 MAX 9 · 1–12 yrs old
    91% on time · 0.9% cancel
    Find Alaska 797 fares Opens this date on Aviasales

  5. #5 · Nonstop · 3h 01m

    4:32 PM → 7:33 PM

    90%

    arrive on time

    4:32 PM SEA → 7:33 PM LAX3h 01m

    SkyWest 5467 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 6–7 yrs old
    91% on time · 0.8% cancel
    Find 4:32 PM flight fares Opens this date on Aviasales

  6. #6 · Nonstop · 3h 08m

    8:45 AM → 11:53 AM

    91%

    arrive on time

    8:45 AM SEA → 11:53 AM LAX3h 08m

    SkyWest 5657 · sold as United Express, Delta Connection, American Eagle or Alaska · also flew as 5608

    Embraer E175 · 5–9 yrs old
    91% on time · 0.4% cancel
    Find 8:45 AM flight fares Opens this date on Aviasales

  7. #7 · Nonstop · 2h 45m

    5:06 PM → 7:55 PM

    88%

    arrive on time

    5:06 PM SEA → 7:55 PM LAX2h 45m

    United 1730

    Boeing 737-900ER or 737 MAX 9 · 0–14 yrs old
    89% on time · 0.4% cancel
    Find United 1730 fares Opens this date on Aviasales

  8. #8 · Nonstop · 2h 45m

    6:00 AM → 8:45 AM

    88%

    arrive on time

    6:00 AM SEA → 8:45 AM LAX2h 45m

    Alaska 485

    Boeing 737-800 or 737 MAX 9 · 1–19 yrs old
    89% on time · 1.0% cancel
    Find Alaska 485 fares Opens this date on Aviasales

  9. #9 · Nonstop · 2h 44m

    6:06 AM → 8:50 AM

    88%

    arrive on time

    6:06 AM SEA → 8:50 AM LAX2h 44m

    United 1635

    Boeing 737 MAX 8 or 737-900ER · 2–18 yrs old
    88% on time · 0.4% cancel
    Find United 1635 fares Opens this date on Aviasales

  10. #10 · Nonstop · 2h 45m

    6:10 AM → 8:55 AM

    87%

    arrive on time

    6:10 AM SEA → 8:55 AM LAX2h 45m

    Alaska 1316

    Boeing 737 MAX 9 or 737-900ER · 2–18 yrs old
    88% on time · 1.0% cancel
    Find Alaska 1316 fares Opens this date 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.

  • United Airlines89%

    393 flights · 90% on time as flown · 0.4% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)85%

    1,248 flights · 86% on time as flown · 0.7% cancel

  • Delta Air Lines84%

    2,222 flights · 85% on time as flown · 0.6% cancel

  • Alaska Airlines79%

    3,285 flights · 80% on time as flown · 1.1% cancel

  • Frontier Airlines78%

    261 flights · 80% 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%

    1,802 flights · avg delay 10 min

  • 9 AM to noon83%

    1,202 flights · avg delay 8 min

  • Noon to 3 PM84%

    1,340 flights · avg delay 9 min

  • 3 to 6 PM81%

    1,538 flights · avg delay 13 min

  • 6 to 9 PM78%

    1,212 flights · avg delay 15 min

  • After 9 PM73%

    316 flights · avg delay 13 min

Best day: Tuesday (86%). Worst: Sunday (79%).

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