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Route on-time record

BOI to SJC: most on-time flights and the best time to fly

Boise (Boise Air Terminal/Gowen Field) to San Jose (Norman Y. Mineta San Jose International Airport). 660 nonstop flights in Jun 2025 to May 2026, 84% arrived within 15 minutes and 0.2% were cancelled. The most reliable flight number was SkyWest 3131 at 10:00 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

BOI → SJC

Boise to San Jose: 660 nonstop flights a year

On time (12 months)

84%

Cancelled

0.2%

avg delay 10 min

Best time to leave

9 AM to noon

93% on time vs 61% 3 to 6 PM

Most reliable airline

SkyWest

91% chance on time

Check BOI to SJC 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 · SkyWest 3131 · sold as United Express, Delta Connection, American Eagle or Alaska

    10:00 AM → 10:53 AM1h 53m nonstop

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

    96%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    1 min
    • Arrived on time 100% of the time (29 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (9 AM to noon: 93% on time; 3 to 6 PM: 61%).
    • Short track record (29 flights), so its score leans on the airline's record at this hour.

    Limited track record · 29 flights

    Find 10:00 AM flight fares Opens this date on Aviasales

  2. #2 · SkyWest 3418 · sold as United Express, Delta Connection, American Eagle or Alaska

    9:02 AM → 10:02 AM2h 00m nonstop

    Local times, typical schedule. Last flown 2026-04-30.

    91%

    chance on time

    On time (history)
    91%
    Cancelled
    0.3%
    Avg arrival delay
    6 min
    • Arrived on time 91% of the time (298 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (9 AM to noon: 93% on time; 3 to 6 PM: 61%).

    Strong track record · 298 flights

    Find 9:02 AM flight fares Opens this date on Aviasales

  3. #3 · Southwest 4275

    2:15 PM → 3:00 PM1h 45m nonstop

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

    82%

    chance on time

    On time (history)
    75%
    Cancelled
    0.0%
    Avg arrival delay
    28 min
    • Arrived on time 75% 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 4275 fares Opens this date on Aviasales

  4. #4 · Southwest 3532

    12:25 PM → 1:10 PM1h 45m nonstop

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

    81%

    chance on time

    On time (history)
    80%
    Cancelled
    0.0%
    Avg arrival delay
    12 min
    • Arrived on time 80% 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 3532 fares Opens this date on Aviasales

  5. #5 · Southwest 864

    1:20 PM → 2:05 PM1h 45m nonstop

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

    62%

    chance on time

    On time (history)
    43%
    Cancelled
    0.0%
    Avg arrival delay
    17 min
    • Arrived on time 43% of the time (23 flights, Jun 2025 to May 2026).
    • 72% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (23 flights), so its score leans on the airline's record at this hour.

    Limited track record · 23 flights

    Find Southwest 864 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)91%

    328 flights · 92% on time as flown · 0.3% cancel

  • Southwest Airlines77%

    332 flights · 76% on time as flown · 0.0% cancel

On time by departure time

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

  • Before 9 AM88%

    78 flights · avg delay 8 min

  • 9 AM to noon93%

    271 flights · avg delay 5 min

  • Noon to 3 PM88%

    166 flights · avg delay 5 min

  • 3 to 6 PM61%

    131 flights · avg delay 24 min

Best day: Saturday (93%). Worst: Monday (82%).

Smarter routing

Nearby airports that run more on time

  • BOI → OAK 86% chance on time

    Boise Air Terminal/Gowen Field to Oakland San Francisco Bay Airport · 599 flights a year · 29 mi from your airports · yours: 84%

    Rank flightsFares

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

J
90
F
86
M
88
A
91
M
89
J
84
J
87
A
90
S
91
O
88
N
89
D
84

What delays this route

  • Late-arriving aircraft61%
  • Airline (crew, maintenance, boarding)36%
  • Air traffic control and airport volume3%

Share of delay minutes by the cause airlines report to the US DOT.

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

Finding the most reliable connections from BOI to SJC…

BOI to SJC questions

What time of day is best to fly BOI to SJC?
9 AM to noon: 93% of flights arrived on time, against 61% for departures 3 to 6 PM.
Which airline is most on time from BOI to SJC?
SkyWest, with a season-adjusted 91% chance of operating and arriving on time over 328 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on BOI to SJC?
December (84% on time); the best was September (91%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?
No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from BOI

Live status: FAA delays and ground stops