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Route on-time record

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

Boise (Boise Air Terminal/Gowen Field) to Sacramento (Sacramento International Airport). 851 nonstop flights in Jun 2025 to May 2026, 84% arrived within 15 minutes and 0.1% were cancelled. The most reliable flight number was Southwest 3163 at 6:30 AM.

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

BOI → SMF

Boise to Sacramento: 851 nonstop flights a year

On time (12 months)

84%

Cancelled

0.1%

avg delay 10 min

Best time to leave

Before 9 AM

97% on time vs 53% after 9 PM

Most reliable airline

Southwest

84% chance on time

Check BOI to SMF fares

Lowest nonstop fare seen in the next two months: $179 (Alaska 2156 on 2026-10-20). 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 3163

    6:30 AM → 7:00 AM1h 30m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 2586; its record covers all of them.

    95%

    chance on time

    On time (history)
    95%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 95% of the time (88 flights, Jun 2025 to May 2026).
    • Never cancelled in 88 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 97% on time; After 9 PM: 53%).

    Moderate track record · 88 flights

    Find Southwest 3163 fares Opens this date on Aviasales

  2. #2 · Southwest 1428

    7:05 AM → 7:30 AM1h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-27.

    95%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (16 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 97% on time; After 9 PM: 53%).
    • Short track record (16 flights), so its score leans on the airline's record at this hour.

    Limited track record · 16 flights

    Find Southwest 1428 fares Opens this date on Aviasales

  3. #3 · Southwest 1459

    8:15 PM → 8:45 PM1h 30m nonstop

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

    86%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    23 min
    • Arrived on time 93% of the time (15 flights, Jun 2025 to May 2026).
    • 71% 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 1459 fares Opens this date on Aviasales

  4. #4 · Southwest 2146

    5:55 PM → 6:25 PM1h 30m nonstop

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

    84%

    chance on time

    On time (history)
    83%
    Cancelled
    7.7%
    Avg arrival delay
    9 min
    • Arrived on time 83% of the time (12 flights, Jun 2025 to May 2026).
    • Short track record (12 flights), so its score leans on the airline's record at this hour.

    Limited track record · 12 flights

    Find Southwest 2146 fares Opens this date on Aviasales

  5. #5 · Southwest 2216

    3:25 PM → 3:50 PM1h 25m nonstop

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

    74%

    chance on time

    On time (history)
    44%
    Cancelled
    0.0%
    Avg arrival delay
    19 min
    • Arrived on time 44% of the time (16 flights, Jun 2025 to May 2026).
    • 51% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (16 flights), so its score leans on the airline's record at this hour.

    Limited track record · 16 flights

    Find Southwest 2216 fares Opens this date on Aviasales

  6. #6 · Southwest 3301

    9:10 PM → 9:40 PM1h 30m nonstop

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

    70%

    chance on time

    On time (history)
    50%
    Cancelled
    0.0%
    Avg arrival delay
    25 min
    • Arrived on time 50% of the time (8 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (After 9 PM: 53% on time; Before 9 AM: 97%).
    • 76% 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 3301 fares Opens this date on Aviasales

  7. #7 · Southwest 866

    6:55 PM → 7:25 PM1h 30m nonstop

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

    67%

    chance on time

    On time (history)
    48%
    Cancelled
    0.0%
    Avg arrival delay
    27 min
    • Arrived on time 48% of the time (23 flights, Jun 2025 to May 2026).
    • 53% 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 866 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines84%

    851 flights · 84% on time as flown · 0.1% cancel

On time by departure time

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

  • Before 9 AM97%

    360 flights · avg delay 3 min

  • Noon to 3 PM89%

    112 flights · avg delay 6 min

  • 3 to 6 PM81%

    119 flights · avg delay 8 min

  • 6 to 9 PM67%

    174 flights · avg delay 23 min

  • After 9 PM53%

    60 flights · avg delay 25 min

Best day: Tuesday (89%). Worst: Monday (82%).

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
87
F
90
M
89
A
87
M
81
J
75
J
75
A
81
S
88
O
85
N
86
D
85

What delays this route

  • Late-arriving aircraft63%
  • Airline (crew, maintenance, boarding)36%
  • Air traffic control and airport volume1%

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

BOI to SMF questions

What time of day is best to fly BOI to SMF?
Before 9 AM: 97% of flights arrived on time, against 53% for departures after 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from BOI to SMF?
Southwest, with a season-adjusted 84% chance of operating and arriving on time over 851 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 SMF?
July (75% on time); the best was February (90%), 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