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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 → OAK

Seattle to Oakland: 1,950 nonstop flights a year

On time (12 months)

73%

Cancelled

0.7%

avg delay 15 min

Best time to leave

Before 9 AM

98% on time vs 61% 6 to 9 PM

Most reliable airline

SkyWest

76% chance on time

Check SEA to OAK fares

Lowest nonstop fare seen in the next two months: $80 (Southwest 855 on 2026-11-04). 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 · Southwest 3588

    7:20 AM → 9:35 AM2h 15m nonstop

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

    92%

    chance on time

    On time (history)
    100%
    Cancelled
    2.2%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (45 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 98% on time; 6 to 9 PM: 61%).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
    • Short track record (45 flights), so its score leans on the airline's record at this hour.

    Limited track record · 45 flights

    Find Southwest 3588 fares Opens this date on Aviasales

  2. #2 · Southwest 4065

    6:45 AM → 8:50 AM2h 05m nonstop

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

    85%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    33 min
    • Arrived on time 91% of the time (23 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 98% on time; 6 to 9 PM: 61%).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
    • Short track record (23 flights), so its score leans on the airline's record at this hour.

    Limited track record · 23 flights

    Find Southwest 4065 fares Opens this date on Aviasales

  3. #3 · Southwest 2857

    6:25 AM → 8:30 AM2h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-30.

    85%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    1 min
    • Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 98% on time; 6 to 9 PM: 61%).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 2857 fares Opens this date on Aviasales

  4. #4 · Alaska 734

    9:55 AM → 12:07 PM2h 17m nonstop

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

    80%

    chance on time

    On time (history)
    85%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 85% of the time (40 flights, Jun 2025 to May 2026).
    • Never cancelled in 40 scheduled flights.
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
    • Short track record (40 flights), so its score leans on the airline's record at this hour.

    Limited track record · 40 flights

    Find Alaska 734 fares Opens this date on Aviasales

  5. #5 · Alaska 469

    2:30 PM → 4:37 PM2h 07m nonstop

    Local times, typical schedule. Last flown 2026-03-17.

    79%

    chance on time

    On time (history)
    84%
    Cancelled
    3.0%
    Avg arrival delay
    5 min
    • Arrived on time 84% of the time (32 flights, Jun 2025 to May 2026).
    • Cancelled 3.0% of the time (1 of 33).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
    • Short track record (32 flights), so its score leans on the airline's record at this hour.

    Limited track record · 32 flights

    Find Alaska 469 fares Opens this date on Aviasales

  6. #6 · Alaska 706

    9:31 PM → 11:43 PM2h 13m nonstop

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

    71%

    chance on time

    On time (history)
    76%
    Cancelled
    2.5%
    Avg arrival delay
    13 min
    • Arrived on time 76% of the time (194 flights, Jun 2025 to May 2026).
    • Departs inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
    • 51% of its delay minutes came from the plane arriving late from an earlier flight.

    Moderate track record · 194 flights

    Find Alaska 706 fares Opens this date on Aviasales

  7. #7 · Alaska 1328

    3:37 PM → 5:46 PM2h 09m nonstop

    Local times, typical schedule. Last flown 2026-04-21.

    69%

    chance on time

    On time (history)
    71%
    Cancelled
    1.3%
    Avg arrival delay
    14 min
    • Arrived on time 71% of the time (221 flights, Jun 2025 to May 2026).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).

    Strong track record · 221 flights

    Find Alaska 1328 fares Opens this date on Aviasales

  8. #8 · Southwest 1053

    9:55 PM → 12:10 AM2h 15m nonstop

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

    68%

    chance on time

    On time (history)
    68%
    Cancelled
    0.0%
    Avg arrival delay
    28 min
    • Arrived on time 68% of the time (28 flights, Jun 2025 to May 2026).
    • Departs inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
    • 60% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (28 flights), so its score leans on the airline's record at this hour.

    Limited track record · 28 flights

    Find Southwest 1053 fares Opens this date on Aviasales

  9. #9 · Southwest 3668

    10:15 PM → 12:30 AM2h 15m nonstop

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

    57%

    chance on time

    On time (history)
    13%
    Cancelled
    0.0%
    Avg arrival delay
    40 min
    • Arrived on time 13% of the time (8 flights, Jun 2025 to May 2026).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
    • 93% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 3668 fares Opens this date on Aviasales

  10. #10 · Southwest 1801

    7:45 PM → 9:55 PM2h 15m nonstop

    Local times, typical schedule. Last flown 2026-05-30.

    54%

    chance on time

    On time (history)
    55%
    Cancelled
    0.0%
    Avg arrival delay
    20 min
    • Arrived on time 55% of the time (47 flights, Jun 2025 to May 2026).
    • Never cancelled in 47 scheduled flights.
    • Leaves in this route's least on-time window (6 to 9 PM: 61% on time; Before 9 AM: 98%).
    • Departs inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.

    Limited track record · 47 flights

    Find Southwest 1801 fares Opens this date on Aviasales

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)76%

    120 flights · 77% on time as flown · 1.1% cancel

  • Southwest Airlines73%

    1,151 flights · 72% on time as flown · 0.2% cancel

  • Alaska Airlines72%

    679 flights · 74% on time as flown · 1.5% cancel

On time by departure time

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

  • Before 9 AM98%

    223 flights · avg delay 4 min

  • 9 AM to noon76%

    602 flights · avg delay 11 min

  • Noon to 3 PM78%

    253 flights · avg delay 11 min

  • 3 to 6 PM61%

    230 flights · avg delay 24 min

  • 6 to 9 PM61%

    359 flights · avg delay 22 min

  • After 9 PM67%

    283 flights · avg delay 18 min

Best day: Tuesday (82%). Worst: Sunday (69%).

Smarter routing

Nearby airports that run more on time

  • SEA → SJC 81% chance on time

    Seattle–Tacoma International Airport to Norman Y. Mineta San Jose International Airport · 4,381 flights a year · 29 mi from your airports · yours: 72%

    Rank flightsFares

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