Boise Air Terminal (BOI) Delays and On-Time Departures
Boise, ID · ranked 62nd of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, Boise (BOI) had 23,701 scheduled departures and 84.3% of them left on time (US average 77.4%).
That ranks 62nd of 333 US airports tracked on this site, with 0.5% of departures cancelled.
Among airlines at Boise (BOI), Alaska Airlines left on time most often (89.6%).
Over 24 months, Tuesday was the most reliable day (89% on time) and June the worst month (81%).
Best time of day to fly out of Boise (BOI)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 7 | |
| 5am–6am | 95.0% | 0.3% | 3,218 |
| 6am–7am | 94.8% | 0.4% | 4,054 |
| 7am–8am | 94.4% | 0.7% | 4,812 |
| 8am–9am | 92.7% | 0.5% | 3,561 |
| 9am–10am | 89.4% | 0.4% | 1,606 |
| 10am–11am | 86.5% | 0.2% | 2,999 |
| 11am–12pm | 88.0% | 0.4% | 2,249 |
| 12pm–1pm | 83.2% | 0.4% | 3,085 |
| 1pm–2pm | 80.6% | 0.8% | 4,725 |
| 2pm–3pm | 81.3% | 0.4% | 3,959 |
| 3pm–4pm | 79.9% | 0.3% | 2,149 |
| 4pm–5pm | 74.2% | 0.6% | 2,047 |
| 5pm–6pm | 76.6% | 0.3% | 3,409 |
| 6pm–7pm | 75.5% | 0.4% | 1,899 |
| 7pm–8pm | 77.3% | 0.4% | 2,404 |
| 8pm–9pm | 73.7% | 0.4% | 545 |
| 9pm–10pm | 56.9% | 0.0% | 216 |
| 10pm–11pm | 67.7% | 0.0% | 62 |
| 11pm–12am | 66.9% | 0.3% | 348 |
Airlines at BOI ranked by on-time departures
Last 12 months. Airlines with fewer than 30 departures are marked “limited data”.
| Airline | On-time departures | On-time arrivals | Cancelled | Departures |
|---|---|---|---|---|
| Alaska Airlines | 89.6% | 86.8% | 0.6% | 2,203 |
| SkyWest Airlines | 88.0% | 85.3% | 0.4% | 10,509 |
| Delta Air Lines | 87.2% | 87.8% | 1.1% | 2,546 |
| United Airlines | 81.0% | 77.9% | 0.4% | 1,392 |
| Frontier Airlines | 80.8% | 80.8% | 0.0% | 130 |
| Southwest Airlines | 77.7% | 81.2% | 0.2% | 5,306 |
| American Airlines | 75.1% | 77.0% | 2.4% | 1,061 |
| Allegiant Air | 74.7% | 71.8% | 0.4% | 242 |
| Envoy Air | 65.9% | 68.9% | 0.0% | 273 |
| Spirit Airlines | 64.1% | 61.5% | 0.0% | 39 |
80%+ good 70–79.9% fair <70% poor
Best day to fly out of BOI
On-time departures by day, 24 months.
Best month to fly out of BOI
On-time departures by month, 24 months.
Holiday travel at Boise (BOI)
On-time departures during holiday periods compared with all other days, last 24 months.
| Period | On-time departures | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 84.2% | -2.2 pts | 0.6% | 913 |
| Christmas & New Year (Dec 20 - Jan 3) | 77.2% | -9.3 pts | 0.7% | 1,896 |
| Summer peak (Jun 15 - Aug 15) | 81.0% | -5.5 pts | 0.5% | 8,429 |
| All other days | 86.5% | — | 0.4% | 36,116 |
Monthly on-time departure trend at BOI
On-time departure % each month, with the 12-month US average for reference.
Routes from Boise (BOI)
Every route from BOI with its own page, by number of flights (last 12 months, on-time arrivals).
| To | On time | Cancelled | Flights |
|---|---|---|---|
| BOI → Seattle (SEA) | 85.2% | 0.4% | 3,761 |
| BOI → Denver (DEN) | 81.6% | 0.1% | 3,033 |
| BOI → Phoenix (PHX) | 83.6% | 0.4% | 2,014 |
| BOI → Salt Lake City (SLC) | 91.3% | 1.0% | 1,740 |
| BOI → San Francisco (SFO) | 68.5% | 0.5% | 1,716 |
| BOI → Los Angeles (LAX) | 92.8% | 0.2% | 1,373 |
| BOI → Las Vegas (LAS) | 81.1% | 0.2% | 1,363 |
| BOI → Chicago (ORD) | 75.3% | 1.2% | 1,111 |
| BOI → Portland (PDX) | 91.4% | 0.6% | 1,084 |
| BOI → San Diego (SAN) | 80.8% | 0.6% | 1,028 |
| BOI → Sacramento (SMF) | 85.0% | 0.1% | 860 |
| BOI → Dallas/Fort Worth (DFW) | 81.1% | 3.1% | 802 |
| BOI → Minneapolis (MSP) | 87.2% | 0.5% | 783 |
| BOI → San Jose (SJC) | 85.8% | 0.1% | 658 |
| BOI → Oakland (OAK) | 83.9% | 0.0% | 554 |
| BOI → Atlanta (ATL) | 84.6% | 1.5% | 545 |
| BOI → Burbank (BUR) | 85.5% | 0.2% | 430 |
| BOI → Santa Ana (SNA) | 81.0% | 0.6% | 359 |
| BOI → Spokane (GEG) | 91.2% | 0.3% | 296 |