Route on-time record
BOI to SAN: most on-time flights and the best time to fly
Boise (Boise Air Terminal/Gowen Field) to San Diego (San Diego International Airport). 1,043 nonstop flights in Jun 2025 to May 2026, 83% arrived within 15 minutes and 0.7% were cancelled. The most reliable flight number was SkyWest 3019 at 8:26 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BOI → SAN
Boise to San Diego: 1,043 nonstop flights a year
On time (12 months)
83%
Cancelled
0.7%
avg delay 10 min
Best time to leave
Before 9 AM
92% on time vs 64% 3 to 6 PM
Most reliable airline
Alaska
87% 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 3019 · sold as United Express, Delta Connection, American Eagle or Alaska
8:26 AM → 9:48 AM2h 22m nonstop
Local times, typical schedule. Last flown 2026-05-31.
93%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 100% of the time (19 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 64%).
- Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (19 flights), so its score leans on the airline's record at this hour.
Limited track record · 19 flights
Find 8:26 AM flight fares Opens this date on Aviasales#2 · Alaska 304
7:43 AM → 9:05 AM2h 22m nonstop
Local times, typical schedule. Last flown 2026-05-12.
90%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 90% of the time (21 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 64%).
- Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find Alaska 304 fares Opens this date on Aviasales#3 · Southwest 859
8:50 AM → 10:05 AM2h 15m nonstop
Local times, typical schedule. Last flown 2026-05-29.
90%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 96% of the time (23 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 64%).
- Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 859 fares Opens this date on Aviasales#4 · Southwest 1219
7:30 AM → 8:45 AM2h 15m nonstop
Local times, typical schedule. Last flown 2026-04-06.
90%
chance on time
- On time (history)
- 97%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 97% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 64%).
- Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Limited track record · 33 flights
Find Southwest 1219 fares Opens this date on Aviasales#5 · Alaska 166
6:32 AM → 7:56 AM2h 24m nonstop
Local times, typical schedule. Last flown 2026-04-21.
89%
chance on time
- On time (history)
- 89%
- Cancelled
- 1.1%
- Avg arrival delay
- 5 min
- Arrived on time 89% of the time (174 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 64%).
- Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Moderate track record · 174 flights
Find Alaska 166 fares Opens this date on Aviasales#6 · Southwest 2034
2:15 PM → 3:25 PM2h 13m nonstop
Local times, typical schedule. Last flown 2026-05-31.
80%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 85% of the time (46 flights, Jun 2025 to May 2026).
- Never cancelled in 46 scheduled flights.
- Short track record (46 flights), so its score leans on the airline's record at this hour.
Limited track record · 46 flights
Find Southwest 2034 fares Opens this date on Aviasales#7 · SkyWest 3481 · sold as United Express, Delta Connection, American Eagle or Alaska
5:56 PM → 7:20 PM2h 24m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.6%
- Avg arrival delay
- 14 min
- Arrived on time 78% of the time (322 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 64% on time; Before 9 AM: 92%).
Strong track record · 322 flights
Find 5:56 PM flight fares Opens this date on Aviasales#8 · Southwest 1220
6:10 PM → 7:20 PM2h 10m nonstop
Local times, typical schedule. Last flown 2026-04-06.
62%
chance on time
- On time (history)
- 47%
- Cancelled
- 0.0%
- Avg arrival delay
- 22 min
- Arrived on time 47% of the time (15 flights, Jun 2025 to May 2026).
- 64% 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 1220 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Alaska Airlines87%
263 flights · 89% on time as flown · 1.0% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)82%
425 flights · 83% on time as flown · 0.5% cancel
- Southwest Airlines78%
355 flights · 78% on time as flown · 0.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM92%
418 flights · avg delay 4 min
- Noon to 3 PM80%
221 flights · avg delay 10 min
- 3 to 6 PM64%
73 flights · avg delay 19 min
- 6 to 9 PM76%
326 flights · avg delay 15 min
Best day: Saturday (87%). Worst: Sunday (79%).
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
- Late-arriving aircraft43%
- Air traffic control and airport volume31%
- Airline (crew, maintenance, boarding)24%
- Severe weather3%
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 SAN questions
- What time of day is best to fly BOI to SAN?
- Before 9 AM: 92% of flights arrived on time, against 64% 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 BOI to SAN?
- Alaska, with a season-adjusted 87% chance of operating and arriving on time over 263 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 SAN?
- August (76% on time); the best was April (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
- SAN to BOI (return)
- BOI to SEA 86%
- BOI to DEN 81%
- BOI to PHX 84%
- BOI to SLC 92%
- BOI to SFO 75%
- BOI to LAS 82%
- BOI to LAX 93%
- BOI to PDX 91%
- BOI to ORD 76%
- BOI to SMF 84%
- BOI to DFW 82%
- BOI to MSP 88%
Live status: FAA delays and ground stops