FlightRecord

Boise Air Terminal/Gowen Field (BOI): Delays & On-Time Performance

Data through May 2026

Boise Air Terminal/Gowen Field (BOI) runs noticeably smoother than most US airports: 85% of its ~65 daily departures leave on time, 7 points above the national average, with an average departure delay of just 11 minutes. 10 airlines fly from Boise, ID to 27 destinations.

Departures on-time
85%
left <15 min late
Avg dep delay
11 min
Arrivals on-time
81%
Cancelled
0.5%
Destinations
27
nonstop
Airlines
10

Monthly on-time trend

Monthly departure on-time percentage at BOI50%75%100%June 2024: 83% on-time (2,063 flights)83Jun 2024July 2024: 83% on-time (2,139 flights)83August 2024: 85% on-time (2,097 flights)85September 2024: 86% on-time (2,038 flights)86Sep 2024October 2024: 90% on-time (1,991 flights)90November 2024: 89% on-time (1,957 flights)89December 2024: 82% on-time (1,971 flights)82Dec 2024January 2025: 87% on-time (1,839 flights)87February 2025: 85% on-time (1,683 flights)85March 2025: 86% on-time (1,947 flights)86Mar 2025April 2025: 88% on-time (1,927 flights)88May 2025: 87% on-time (1,993 flights)87June 2025: 83% on-time (2,074 flights)83Jun 2025July 2025: 83% on-time (2,136 flights)83August 2025: 85% on-time (2,025 flights)85September 2025: 87% on-time (1,924 flights)87Sep 2025October 2025: 87% on-time (2,008 flights)87November 2025: 86% on-time (1,956 flights)86December 2025: 82% on-time (2,012 flights)82Dec 2025January 2026: 88% on-time (1,910 flights)88February 2026: 89% on-time (1,781 flights)89March 2026: 86% on-time (2,027 flights)86Mar 2026April 2026: 85% on-time (1,946 flights)85May 2026: 81% on-time (2,040 flights)81

Best time of day to depart from BOI

On-time percentage by scheduled departure hour at BOI5 a.m.: 95% on-time (3,227 flights)56 a.m.: 95% on-time (3,906 flights)67 a.m.: 94% on-time (4,815 flights)78 a.m.: 92% on-time (3,479 flights)89 a.m.: 89% on-time (1,700 flights)910 a.m.: 88% on-time (2,909 flights)1011 a.m.: 87% on-time (2,313 flights)1112 p.m.: 84% on-time (3,111 flights)121 p.m.: 81% on-time (4,851 flights)132 p.m.: 82% on-time (3,875 flights)143 p.m.: 80% on-time (2,084 flights)154 p.m.: 77% on-time (1,908 flights)165 p.m.: 77% on-time (3,623 flights)176 p.m.: 75% on-time (1,904 flights)187 p.m.: 80% on-time (2,472 flights)198 p.m.: 72% on-time (636 flights)209 p.m.: 66% on-time (246 flights)2111 p.m.: 66% on-time (331 flights)23scheduled departure hour

Busiest routes from BOI

RouteFlights/12moOn-timeAvg delay
BOI → SEA3,84784%10 min
BOI → DEN3,03682%14 min
BOI → PHX1,96584%12 min
BOI → SLC1,74090%9 min
BOI → SFO1,67376%18 min
BOI → LAS1,43182%13 min
BOI → LAX1,36693%6 min
BOI → PDX1,15690%6 min

Most reliable routes

  1. BOI → LAX93%
  2. BOI → SLC90%
  3. BOI → PDX90%
  4. BOI → SJC87%
  5. BOI → OAK87%

Most delay-prone routes

  1. BOI → SFO76%
  2. BOI → DFW79%
  3. BOI → SNA80%
  4. BOI → ATL80%
  5. BOI → ORD80%

Airline performance at BOI

AirlineOn-time departuresAvg delayFlights
SkyWest Airlines88%9 min22,441
Alaska Airlines88%8 min2,721
Delta Air Lines85%12 min5,379
United Airlines83%16 min3,035
Southwest Airlines82%11 min10,441
American Airlines80%20 min1,924
Spirit Airlines79%15 min433
Allegiant Air77%29 min589
Frontier Airlines76%31 min129
Envoy Air72%22 min392

Frequently asked questions

How often are flights delayed at BOI?
15% of departures from Boise Air Terminal/Gowen Field left 15+ minutes late between 2024-06 and 2026-05, with an average departure delay of 11 minutes. The national on-time average over the same period was 78%.
What is the best time of day to depart from BOI?
Flights scheduled around 6 a.m. depart on time 95% of the time at BOI, versus 66% around 11 p.m.. Booking before noon is the usual rule of thumb here.
What is the worst month for delays at BOI?
In this dataset, May 2026 was the weakest month at BOI, with 81% of departures on time.
How often are flights cancelled at BOI?
0.5% of scheduled departures from BOI were cancelled in this period, compared with a national rate of 1.6%.

Popular route pages from this airport

Based on 47,484 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.