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Route on-time record

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

San Francisco (San Francisco International Airport) to Boise (Boise Air Terminal/Gowen Field). 1,670 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.3% were cancelled. The most reliable flight number was SkyWest 5623 at 8:10 AM.

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

SFO → BOI

San Francisco to Boise: 1,670 nonstop flights a year

On time (12 months)

78%

Cancelled

0.3%

avg delay 15 min

Best time to leave

Before 9 AM

93% on time vs 74% 3 to 6 PM

Most reliable airline

United

82% chance on time

Check SFO to BOI 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 5623 · sold as United Express, Delta Connection, American Eagle or Alaska

    8:10 AM → 11:06 AM1h 56m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    89%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 91% of the time (77 flights, Jun 2025 to May 2026).
    • Never cancelled in 77 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 93% on time; 3 to 6 PM: 74%).
    • Departs inside SFO's trouble window: 61% of its 333 ground stops and delay programs started between 7 AM and 1 PM.

    Moderate track record · 77 flights

    Find 8:10 AM flight fares Opens this date on Aviasales

  2. #2 · United 267

    1:54 PM → 4:44 PM1h 50m nonstop

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

    80%

    chance on time

    On time (history)
    64%
    Cancelled
    0.0%
    Avg arrival delay
    31 min
    • Arrived on time 64% of the time (11 flights, Jun 2025 to May 2026).
    • Departs outside SFO's trouble window (7 AM to 1 PM, when 61% of its 333 ground stops and delay programs started).
    • 94% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find United 267 fares Opens this date on Aviasales

  3. #3 · SkyWest 5281 · sold as United Express, Delta Connection, American Eagle or Alaska

    1:59 PM → 4:49 PM1h 50m nonstop

    Local times, typical schedule. Last flown 2026-03-28.

    78%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    12 min
    • Arrived on time 88% of the time (24 flights, Jun 2025 to May 2026).
    • Departs outside SFO's trouble window (7 AM to 1 PM, when 61% of its 333 ground stops and delay programs started).
    • Short track record (24 flights), so its score leans on the airline's record at this hour.

    Limited track record · 24 flights

    Find 1:59 PM flight fares Opens this date on Aviasales

  4. #4 · SkyWest 5435 · sold as United Express, Delta Connection, American Eagle or Alaska

    1:50 PM → 4:48 PM1h 58m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    77%

    chance on time

    On time (history)
    77%
    Cancelled
    0.4%
    Avg arrival delay
    16 min
    • Arrived on time 77% of the time (244 flights, Jun 2025 to May 2026).
    • Departs outside SFO's trouble window (7 AM to 1 PM, when 61% of its 333 ground stops and delay programs started).

    Strong track record · 244 flights

    Find 1:50 PM flight fares Opens this date on Aviasales

  5. #5 · SkyWest 6027 · sold as United Express, Delta Connection, American Eagle or Alaska

    9:05 PM → 11:57 PM1h 52m nonstop

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

    77%

    chance on time

    On time (history)
    75%
    Cancelled
    0.0%
    Avg arrival delay
    32 min
    • Arrived on time 75% of the time (52 flights, Jun 2025 to May 2026).
    • Never cancelled in 52 scheduled flights.
    • Departs outside SFO's trouble window (7 AM to 1 PM, when 61% of its 333 ground stops and delay programs started).
    • 79% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 52 flights

    Find 9:05 PM flight fares Opens this date on Aviasales

  6. #6 · SkyWest 5644 · sold as United Express, Delta Connection, American Eagle or Alaska

    6:25 PM → 9:17 PM1h 52m nonstop

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

    77%

    chance on time

    On time (history)
    77%
    Cancelled
    0.4%
    Avg arrival delay
    19 min
    • Arrived on time 77% of the time (231 flights, Jun 2025 to May 2026).
    • Departs outside SFO's trouble window (7 AM to 1 PM, when 61% of its 333 ground stops and delay programs started).

    Strong track record · 231 flights

    Find 6:25 PM flight fares Opens this date on Aviasales

  7. #7 · SkyWest 4697 · sold as United Express, Delta Connection, American Eagle or Alaska

    10:15 AM → 1:08 PM1h 53m nonstop

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

    75%

    chance on time

    On time (history)
    56%
    Cancelled
    0.0%
    Avg arrival delay
    20 min
    • Arrived on time 56% of the time (9 flights, Jun 2025 to May 2026).
    • Departs inside SFO's trouble window: 61% of its 333 ground stops and delay programs started between 7 AM and 1 PM.
    • Short track record (9 flights), so its score leans on the airline's record at this hour.

    Limited track record · 9 flights

    Find 10:15 AM flight fares Opens this date on Aviasales

  8. #8 · SkyWest 3375 · sold as United Express, Delta Connection, American Eagle or Alaska

    6:56 PM → 9:40 PM1h 44m nonstop

    Local times, typical schedule. Last flown 2026-05-12.

    74%

    chance on time

    On time (history)
    75%
    Cancelled
    0.0%
    Avg arrival delay
    21 min
    • Arrived on time 75% of the time (202 flights, Jun 2025 to May 2026).
    • Never cancelled in 203 scheduled flights.
    • Departs outside SFO's trouble window (7 AM to 1 PM, when 61% of its 333 ground stops and delay programs started).

    Strong track record · 202 flights

    Find 6:56 PM flight fares Opens this date on Aviasales

  9. #9 · SkyWest 5720 · sold as United Express, Delta Connection, American Eagle or Alaska

    4:55 PM → 7:53 PM1h 56m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    74%

    chance on time

    On time (history)
    74%
    Cancelled
    0.4%
    Avg arrival delay
    17 min
    • Arrived on time 74% of the time (276 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (3 to 6 PM: 74% on time; Before 9 AM: 93%).
    • Departs outside SFO's trouble window (7 AM to 1 PM, when 61% of its 333 ground stops and delay programs started).

    Strong track record · 276 flights

    Find 4:55 PM flight fares Opens this date on Aviasales

  10. #10 · SkyWest 6035 · sold as United Express, Delta Connection, American Eagle or Alaska

    12:30 PM → 3:26 PM1h 56m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    65%

    chance on time

    On time (history)
    57%
    Cancelled
    2.0%
    Avg arrival delay
    29 min
    • Arrived on time 57% of the time (49 flights, Jun 2025 to May 2026).
    • Departs inside SFO's trouble window: 61% of its 333 ground stops and delay programs started between 7 AM and 1 PM.
    • Short track record (49 flights), so its score leans on the airline's record at this hour.

    Limited track record · 49 flights

    Find 12:30 PM flight fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines82%

    230 flights · 84% on time as flown · 0.4% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)77%

    1,440 flights · 77% on time as flown · 0.3% cancel

On time by departure time

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

  • Before 9 AM93%

    162 flights · avg delay 7 min

  • 9 AM to noon82%

    177 flights · avg delay 8 min

  • Noon to 3 PM76%

    409 flights · avg delay 16 min

  • 3 to 6 PM74%

    277 flights · avg delay 17 min

  • 6 to 9 PM74%

    568 flights · avg delay 20 min

  • After 9 PM91%

    77 flights · avg delay 5 min

Best day: Saturday (84%). Worst: Monday (76%).

Smarter routing

Nearby airports that run more on time

  • SJC → BOI 87% chance on time

    Norman Y. Mineta San Jose International Airport to Boise Air Terminal/Gowen Field · 677 flights a year · 30 mi from your airports · yours: 78%

    Rank flightsFares

  • OAK → BOI 84% chance on time

    Oakland San Francisco Bay Airport to Boise Air Terminal/Gowen Field · 600 flights a year · 11 mi from your airports · yours: 78%

    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
82
F
77
M
87
A
81
M
75
J
82
J
80
A
80
S
85
O
81
N
85
D
72

What delays this route

  • Late-arriving aircraft39%
  • Airline (crew, maintenance, boarding)29%
  • Air traffic control and airport volume28%
  • Severe weather4%

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 SFO to BOI…

SFO to BOI questions

What time of day is best to fly SFO to BOI?
Before 9 AM: 93% of flights arrived on time, against 74% for departures 3 to 6 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 SFO to BOI?
United, with a season-adjusted 82% chance of operating and arriving on time over 230 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 SFO to BOI?
December (72% on time); the best was March (87%), 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 SFO

Live status: FAA delays and ground stops