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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.

SJC → SNA

San Jose to Santa Ana: 2,679 nonstop flights a year

On time (12 months)

87%

Cancelled

0.9%

avg delay 7 min

Best time to leave

Before 9 AM

97% on time vs 78% 3 to 6 PM

Most reliable airline

Southwest

87% chance on time

Check SJC to SNA 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 · Southwest 4270

    6:30 AM → 7:55 AM1h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 4455; its record covers all of them.

    95%

    chance on time

    On time (history)
    99%
    Cancelled
    2.3%
    Avg arrival delay
    0 min
    • Arrived on time 99% of the time (85 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 97% on time; 3 to 6 PM: 78%).

    Moderate track record · 85 flights

    Find Southwest 4270 fares Opens this date on Aviasales

  2. #2 · Southwest 1866

    10:00 AM → 11:20 AM1h 20m nonstop

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

    95%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (15 flights, Jun 2025 to May 2026).
    • Short track record (15 flights), so its score leans on the airline's record at this hour.

    Limited track record · 15 flights

    Find Southwest 1866 fares Opens this date on Aviasales

  3. #3 · Southwest 4271

    8:00 AM → 9:20 AM1h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-29.

    95%

    chance on time

    On time (history)
    97%
    Cancelled
    2.6%
    Avg arrival delay
    1 min
    • Arrived on time 97% of the time (38 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 97% on time; 3 to 6 PM: 78%).
    • Short track record (38 flights), so its score leans on the airline's record at this hour.

    Limited track record · 38 flights

    Find Southwest 4271 fares Opens this date on Aviasales

  4. #4 · Southwest 2495

    10:45 AM → 12:05 PM1h 20m nonstop

    Local times, typical schedule. Last flown 2026-04-01.

    94%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 2495 fares Opens this date on Aviasales

  5. #5 · Southwest 1933

    8:10 AM → 9:35 AM1h 25m nonstop

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

    93%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    22 min
    • Arrived on time 93% of the time (15 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 97% on time; 3 to 6 PM: 78%).
    • 85% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (15 flights), so its score leans on the airline's record at this hour.

    Limited track record · 15 flights

    Find Southwest 1933 fares Opens this date on Aviasales

  6. #6 · Southwest 4272

    9:45 AM → 11:05 AM1h 20m nonstop

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

    92%

    chance on time

    On time (history)
    97%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 97% of the time (30 flights, Jun 2025 to May 2026).
    • Never cancelled in 30 scheduled flights.
    • Short track record (30 flights), so its score leans on the airline's record at this hour.

    Limited track record · 30 flights

    Find Southwest 4272 fares Opens this date on Aviasales

  7. #7 · Southwest 2594

    12:05 PM → 1:30 PM1h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-30. Same departure also flew as Southwest 4273, 3810, 278; its record covers all of them.

    89%

    chance on time

    On time (history)
    91%
    Cancelled
    1.0%
    Avg arrival delay
    4 min
    • Arrived on time 91% of the time (103 flights, Jun 2025 to May 2026).

    Moderate track record · 103 flights

    Find Southwest 2594 fares Opens this date on Aviasales

  8. #8 · Southwest 1195

    9:25 AM → 10:50 AM1h 25m nonstop

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

    88%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    11 min
    • Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 1195 fares Opens this date on Aviasales

  9. #9 · Southwest 510

    3:15 PM → 4:35 PM1h 20m nonstop

    Local times, typical schedule. Last flown 2026-04-06. Same departure also flew as Southwest 1196; its record covers all of them.

    84%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 91% of the time (23 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (3 to 6 PM: 78% on time; Before 9 AM: 97%).
    • Short track record (23 flights), so its score leans on the airline's record at this hour.

    Limited track record · 23 flights

    Find Southwest 510 fares Opens this date on Aviasales

  10. #10 · Southwest 4460

    6:30 PM → 7:55 PM1h 25m nonstop

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

    84%

    chance on time

    On time (history)
    90%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 90% of the time (20 flights, Jun 2025 to May 2026).
    • Short track record (20 flights), so its score leans on the airline's record at this hour.

    Limited track record · 20 flights

    Find Southwest 4460 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines87%

    2,654 flights · 88% on time as flown · 0.9% cancel

On time by departure time

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

  • Before 9 AM97%

    549 flights · avg delay 2 min

  • 9 AM to noon93%

    496 flights · avg delay 4 min

  • Noon to 3 PM87%

    481 flights · avg delay 8 min

  • 3 to 6 PM78%

    589 flights · avg delay 11 min

  • 6 to 9 PM84%

    564 flights · avg delay 8 min

Best day: Tuesday (91%). Worst: Sunday (83%).

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