San Diego (SAN) to Boise (BOI): On-Time Performance
Data through July 2026
San Diego (SAN) to Boise (BOI) effectively runs on two schedules. In September 2025, 89% of arrivals were on time; in December 2024 that fell to 61% — a 28-point seasonal swing. Across the full period the route averages 77% on-time against a national 78%.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 2.8
- last 12 months
- Duration
- 2h 20m
- scheduled
- Distance
- 749 mi
Best airline from SAN to BOI
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlinesmost reliable | 80% | 11 min | 1.0% | 290 |
| SkyWest Airlines | 78% | 15 min | 0.9% | 996 |
| Southwest Airlines | 74% | 15 min | 0.2% | 623 |
Monthly on-time trend
Best time to fly from SAN to BOI
Aim for departures around 1 p.m. (87% on-time); avoid 12 p.m. departures (58%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 16 min |
| Tuesday | 81% | 9 min |
| Wednesday | 84% | 11 min |
| Thursday | 68% | 21 min |
| Friday | 69% | 19 min |
| Saturdaybest | 86% | 8 min |
| Sunday | 77% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft51%
- Airline operations25%
- National airspace system20%
- Weather4%
Frequently asked questions
- How often are flights from SAN to BOI delayed?
- 23% of SAN–BOI flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 14 minutes.
- Which airline is most reliable from SAN to BOI?
- Alaska Airlines has the best on-time record on this route at 80%, based on 290 flights. 3 airlines flew SAN–BOI frequently enough to compare in this period.
- What is the best time of day to fly from SAN to BOI?
- Departures around 1 p.m. have the best record (87% on-time), while departures around 12 p.m. have the worst (58%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SAN to BOI?
- The scheduled SAN–BOI flight time averages 2h 20m over 749 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are SAN to BOI flights cancelled?
- 0.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from SAN to BOI?
- December 2024 was the roughest month in this dataset, with only 61% of arrivals on time. The best was September 2025 at 89%. If your dates are flexible, that 28-point gap is worth planning around.
Explore related pages
More routes from SAN
Other ways to fly to Boise (BOI)
Related guides
Based on 1,909 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.