Route on-time record
BOI to SFO: most on-time flights and the best time to fly
Boise (Boise Air Terminal/Gowen Field) to San Francisco (San Francisco International Airport). 1,673 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 0.5% were cancelled. The most reliable flight number was SkyWest 4678 at 6:15 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BOI → SFO
Boise to San Francisco: 1,673 nonstop flights a year
On time (12 months)
75%
Cancelled
0.5%
avg delay 21 min
Best time to leave
Before 9 AM
81% on time vs 67% 6 to 9 PM
Most reliable airline
United
75% chance on time
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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 · SkyWest 4678 · sold as United Express, Delta Connection, American Eagle or Alaska
6:15 AM → 7:30 AM2h 04m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
- On time (history)
- 87%
- Cancelled
- 0.4%
- Avg arrival delay
- 15 min
- Arrived on time 87% of the time (246 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 81% on time; 6 to 9 PM: 67%).
- Lands inside SFO's trouble window: 61% of its 333 ground stops and delay programs started between 7 AM and 1 PM.
Strong track record · 246 flights
Find 6:15 AM flight fares Opens this date on Aviasales#2 · SkyWest 4733 · sold as United Express, Delta Connection, American Eagle or Alaska
12:30 PM → 1:32 PM2h 02m nonstop
Local times, typical schedule. Last flown 2026-05-31.
74%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 17 min
- Arrived on time 75% of the time (346 flights, Jun 2025 to May 2026).
- Never cancelled in 346 scheduled flights.
Strong track record · 346 flights
Find 12:30 PM flight fares Opens this date on Aviasales#3 · SkyWest 3025 · sold as United Express, Delta Connection, American Eagle or Alaska
7:40 AM → 8:40 AM2h 00m nonstop
Local times, typical schedule. Last flown 2026-05-12.
73%
chance on time
- On time (history)
- 72%
- Cancelled
- 1.0%
- Avg arrival delay
- 20 min
- Arrived on time 72% of the time (186 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 81% on time; 6 to 9 PM: 67%).
- Lands inside SFO's trouble window: 61% of its 333 ground stops and delay programs started between 7 AM and 1 PM.
Moderate track record · 186 flights
Find 7:40 AM flight fares Opens this date on Aviasales#4 · United 649
7:05 PM → 7:58 PM1h 53m nonstop
Local times, typical schedule. Last flown 2026-05-31.
69%
chance on time
- On time (history)
- 36%
- Cancelled
- 0.0%
- Avg arrival delay
- 48 min
- Arrived on time 36% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 67% on time; Before 9 AM: 81%).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find United 649 fares Opens this date on Aviasales#5 · SkyWest 4753 · sold as United Express, Delta Connection, American Eagle or Alaska
6:55 PM → 7:58 PM2h 02m nonstop
Local times, typical schedule. Last flown 2026-05-20.
68%
chance on time
- On time (history)
- 68%
- Cancelled
- 0.4%
- Avg arrival delay
- 28 min
- Arrived on time 68% of the time (245 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 67% on time; Before 9 AM: 81%).
Strong track record · 245 flights
Find 6:55 PM flight fares Opens this date on Aviasales#6 · SkyWest 4661 · sold as United Express, Delta Connection, American Eagle or Alaska
4:20 PM → 5:22 PM2h 02m nonstop
Local times, typical schedule. Last flown 2026-05-31.
67%
chance on time
- On time (history)
- 52%
- Cancelled
- 2.1%
- Avg arrival delay
- 32 min
- Arrived on time 52% of the time (46 flights, Jun 2025 to May 2026).
- Short track record (46 flights), so its score leans on the airline's record at this hour.
Limited track record · 46 flights
Find 4:20 PM flight fares Opens this date on Aviasales#7 · SkyWest 6005 · sold as United Express, Delta Connection, American Eagle or Alaska
12:59 PM → 2:05 PM2h 06m nonstop
Local times, typical schedule. Last flown 2026-03-28.
66%
chance on time
- On time (history)
- 67%
- Cancelled
- 0.0%
- Avg arrival delay
- 30 min
- Arrived on time 67% of the time (24 flights, Jun 2025 to May 2026).
- 66% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find 12:59 PM flight fares Opens this date on Aviasales#8 · SkyWest 4639 · sold as United Express, Delta Connection, American Eagle or Alaska
9:26 AM → 10:30 AM2h 04m nonstop
Local times, typical schedule. Last flown 2026-05-20.
58%
chance on time
- On time (history)
- 48%
- Cancelled
- 0.0%
- Avg arrival delay
- 47 min
- Arrived on time 48% of the time (77 flights, Jun 2025 to May 2026).
- Never cancelled in 77 scheduled flights.
- Lands 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 9:26 AM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines75%
231 flights · 78% on time as flown · 0.7% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)74%
1,442 flights · 74% on time as flown · 0.4% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM81%
570 flights · avg delay 18 min
- 9 AM to noon71%
344 flights · avg delay 21 min
- Noon to 3 PM77%
374 flights · avg delay 19 min
- 6 to 9 PM67%
346 flights · avg delay 28 min
Best day: Saturday (83%). Worst: Thursday (74%).
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 · 11 mi from your airports · yours: 74%
BOI → SJC 84% chance on time
Boise Air Terminal/Gowen Field to Norman Y. Mineta San Jose International Airport · 660 flights a year · 30 mi from your airports · yours: 74%
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.
What delays this route
- Air traffic control and airport volume45%
- Airline (crew, maintenance, boarding)32%
- Late-arriving aircraft21%
- Severe weather2%
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 SFO questions
- What time of day is best to fly BOI to SFO?
- Before 9 AM: 81% of flights arrived on time, against 67% for departures 6 to 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 SFO?
- United, with a season-adjusted 75% chance of operating and arriving on time over 231 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 SFO?
- May (61% on time); the best was January (85%), 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
- SFO to BOI (return)
- BOI to SEA 86%
- BOI to DEN 81%
- BOI to PHX 84%
- BOI to SLC 92%
- BOI to LAS 82%
- BOI to LAX 93%
- BOI to PDX 91%
- BOI to ORD 76%
- BOI to SAN 83%
- BOI to SMF 84%
- BOI to DFW 82%
- BOI to MSP 88%
Live status: FAA delays and ground stops