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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.

LAX → SEA

Los Angeles to Seattle: 7,405 nonstop flights a year

On time (12 months)

85%

Cancelled

1.0%

avg delay 10 min

Best time to leave

Before 9 AM

89% on time vs 81% 6 to 9 PM

Most reliable airline

Delta

87% chance on time

Check LAX to SEA fares

Lowest nonstop fare seen in the next two months: $68 (Frontier 1177 on 2026-11-21). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Best trips

33 nonstop, 13 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 · 2h 53m

    9:56 AM → 12:49 PM

    92%

    arrive on time

    9:56 AM LAX → 12:49 PM SEA2h 53m

    Delta 1714

    Boeing 737-800 · 24–27 yrs old
    92% on time · 0.6% cancel
    Find Delta 1714 fares Opens this date on Aviasales

  2. #2 · Nonstop · 2h 59m

    6:30 AM → 9:29 AM

    91%

    arrive on time

    6:30 AM LAX → 9:29 AM SEA2h 59m

    Alaska 1413 · also flew as 383

    Boeing 737-900ER or 737 MAX 9 · 3–18 yrs old
    93% on time · 1.4% cancel
    Find Alaska 1413 fares Opens this date on Aviasales

  3. #3 · Nonstop · 3h 07m

    8:30 AM → 11:37 AM

    91%

    arrive on time

    8:30 AM LAX → 11:37 AM SEA3h 07m

    SkyWest 5873 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 5–7 yrs old
    92% on time · 0.9% cancel
    Find 8:30 AM flight fares Opens this date on Aviasales

  4. #4 · Nonstop · 3h 06m

    12:45 PM → 3:51 PM

    91%

    arrive on time

    12:45 PM LAX → 3:51 PM SEA3h 06m

    SkyWest 5273 · sold as United Express, Delta Connection, American Eagle or Alaska

    Embraer E175 · 6–10 yrs old
    91% on time · 0.5% cancel
    Find 12:45 PM flight fares Opens this date on Aviasales

  5. #5 · Nonstop · 2h 53m

    7:35 AM → 10:26 AM

    90%

    arrive on time

    7:35 AM LAX → 10:26 AM SEA2h 53m

    Delta 2980

    Boeing 737-900ER or 737-800 · 7–26 yrs old
    91% on time · 1.0% cancel
    Find Delta 2980 fares Opens this date on Aviasales

  6. #6 · Nonstop · 3h 02m

    7:40 PM → 10:42 PM

    90%

    arrive on time

    7:40 PM LAX → 10:42 PM SEA3h 02m

    Alaska 84

    Boeing 737-900ER or 737 MAX 9 · 3–19 yrs old
    90% on time · 0.6% cancel
    Find Alaska 84 fares Opens this date on Aviasales

  7. #7 · Nonstop · 2h 57m

    3:53 PM → 6:51 PM

    89%

    arrive on time

    3:53 PM LAX → 6:51 PM SEA2h 57m

    Alaska 698

    Boeing 737 MAX 9 or 737-900ER · 2–14 yrs old
    90% on time · 1.2% cancel
    Find Alaska 698 fares Opens this date on Aviasales

  8. #8 · Nonstop · 2h 58m

    8:00 PM → 10:58 PM

    88%

    arrive on time

    8:00 PM LAX → 10:58 PM SEA2h 58m

    SkyWest 4955 · sold as United Express, Delta Connection, American Eagle or Alaska

    Bombardier CRJ700 · 21–23 yrs old
    89% on time · 0.5% cancel
    Find 8:00 PM flight fares Opens this date on Aviasales

  9. #9 · Nonstop · 2h 51m

    11:50 AM → 2:41 PM

    88%

    arrive on time

    11:50 AM LAX → 2:41 PM SEA2h 51m

    Delta 1045

    Boeing 737-900ER or Airbus A321neo · 3–12 yrs old
    88% on time · 0.7% cancel
    Find Delta 1045 fares Opens this date on Aviasales

  10. #10 · Nonstop · 3h 01m

    9:00 AM → 12:01 PM

    88%

    arrive on time

    9:00 AM LAX → 12:01 PM SEA3h 01m

    Alaska 1317

    Boeing 737 MAX 8 or 737-900ER · 1–18 yrs old
    89% on time · 1.6% cancel
    Find Alaska 1317 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.

  • Delta Air Lines87%

    2,222 flights · 87% on time as flown · 0.7% cancel

  • United Airlines84%

    395 flights · 84% on time as flown · 0.6% cancel

  • Alaska Airlines84%

    3,280 flights · 85% on time as flown · 1.2% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)83%

    1,246 flights · 84% on time as flown · 0.7% 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%

    1,344 flights · avg delay 8 min

  • 9 AM to noon87%

    1,504 flights · avg delay 9 min

  • Noon to 3 PM86%

    1,105 flights · avg delay 9 min

  • 3 to 6 PM85%

    1,509 flights · avg delay 11 min

  • 6 to 9 PM81%

    1,694 flights · avg delay 13 min

  • After 9 PM82%

    249 flights · avg delay 10 min

Best day: Tuesday (89%). Worst: Sunday (81%).

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