Airport reliability

Boise (BOI) on-time performance

How reliably flights leave Boise, ID (BOI) and reach their destinations, by airline, departure hour and month, September 2025 to August 2026.

Historical performance Official DOT data through August 2026 · Not live flight status

Boise, ID23,697 departures in 12 months

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Departures on time: 82.7%
Cancelled: 0.5%
60+ minutes late: 5.5%
Scheduled departures: 23,697

What this means

BOI departures beat the U.S. average.

82.7% of the 23,697 scheduled departures from Boise (BOI) arrived at their destination on time, 7.1 points higher than the U.S. average of 75.6%.
0.5% of departures were cancelled (U.S. average 1.9%), and 5.5% arrived an hour or more late.
Flights arriving at BOI were on time 80.0% of the time.
Among airlines with at least 300 departures, Delta Air Lines was the most punctual from BOI (86.7%) and American Airlines the least (75.3%).
Over the last 3 years, October was the most reliable month for departures from BOI (87.1% on time) and July the least reliable (79.9%).
Flights scheduled to depart 6 am to 7 am were the most punctual (93.3% on time); flights scheduled to depart 9 pm to 10 pm were the least (57.3%).

Airlines at BOI

Ranked by on-time arrival

Departures from BOI, September 2025 to August 2026. On time means arrived at the destination within 15 minutes of schedule.
Airline	On time	Cancelled	60+ min late	Avg delay when late	Departures
Delta Air Lines	86.7%	1.1%	4.0%	83 min	2,541
Alaska Airlines	86.6%	0.6%	3.2%	51 min	2,313
SkyWest AirlinesSold as United Express, Delta Connection, American Eagle, Alaska	84.3%	0.4%	5.3%	71 min	10,341
Frontier Airlines	81.8%	0.0%	7.6%	101 min	132
Southwest Airlines	80.7%	0.3%	4.8%	55 min	5,342
United Airlines	75.9%	0.4%	11.5%	101 min	1,396
American Airlines	75.3%	2.1%	8.7%	99 min	1,082
Allegiant Air	71.4%	0.4%	8.7%	82 min	231
Envoy AirSold as American Eagle	71.2%	0.0%	10.5%	87 min	295
Spirit Airlines	Insufficient sample				24

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On-time rate by departure hour

<6a 93.0%

6a 93.3%

7a 90.9%

8a 86.4%

9a 83.1%

10a 82.5%

11a 87.6%

12p 81.4%

1p 80.4%

2p 78.6%

3p 77.1%

4p 72.5%

5p 75.7%

6p 71.8%

7p 68.4%

8p 73.2%

9p 57.3%

10p Insufficient sample

11p 78.1%

Share of scheduled flights on time BOI average 82.7%

Departures from BOI by scheduled local departure hour, September 2025 to August 2026. Scale starts at zero.

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Period	On time	Flights
Departing before 6 am	93.0%	1,617
Departing 6 am to 7 am	93.3%	2,454
Departing 7 am to 8 am	90.9%	2,427
Departing 8 am to 9 am	86.4%	1,900
Departing 9 am to 10 am	83.1%	797
Departing 10 am to 11 am	82.5%	1,606
Departing 11 am to noon	87.6%	1,106
Departing noon to 1 pm	81.4%	1,443
Departing 1 pm to 2 pm	80.4%	2,202
Departing 2 pm to 3 pm	78.6%	1,891
Departing 3 pm to 4 pm	77.1%	1,117
Departing 4 pm to 5 pm	72.5%	1,253
Departing 5 pm to 6 pm	75.7%	1,307
Departing 6 pm to 7 pm	71.8%	1,047
Departing 7 pm to 8 pm	68.4%	976
Departing 8 pm to 9 pm	73.2%	235
Departing 9 pm to 10 pm	57.3%	124
Departing 10 pm to 11 pm	Insufficient sample	12
Departing 11 pm to midnight	78.1%	183

Best and worst months at BOI

Jan 81.7%

Feb 83.4%

Mar 85.0%

Apr 84.8%

May 82.9%

Jun 80.4%

Jul 79.9%

Aug 81.7%

Sep 85.8%

Oct 87.1%

Nov 85.7%

Dec 82.9%

Share of scheduled flights on time 12-month average 82.7%

Departures from BOI by calendar month, September 2023 to August 2026 pooled. Scale starts at zero.

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Period	On time	Flights
January	81.7%	5,346
February	83.4%	4,944
March	85.0%	5,697
April	84.8%	5,660
May	82.9%	6,049
June	80.4%	6,139
July	79.9%	6,345
August	81.7%	6,143
September	85.8%	5,770
October	87.1%	5,917
November	85.7%	5,689
December	82.9%	5,672

Month by month, last 12 months

Sep 83.9%

Oct 85.7%

Nov 82.3%

Dec 83.0%

Jan 85.1%

Feb 87.5%

Mar 86.0%

Apr 83.9%

May 80.1%

Jun 78.0%

Jul 78.0%

Aug 79.9%

Share of scheduled flights on time U.S. average 75.6%

Departures from BOI, September 2025 to August 2026. Scale starts at zero.

Show as table

Period	On time	Flights
Sep 2025	83.9%	1,924
Oct 2025	85.7%	2,008
Nov 2025	82.3%	1,956
Dec 2025	83.0%	2,012
Jan 2026	85.1%	1,910
Feb 2026	87.5%	1,781
Mar 2026	86.0%	2,027
Apr 2026	83.9%	1,946
May 2026	80.1%	2,040
Jun 2026	78.0%	2,002
Jul 2026	78.0%	2,070
Aug 2026	79.9%	2,021

Busiest routes from BOI

Nonstop routes from BOI by scheduled flights, September 2025 to August 2026.
To	On time	Cancelled	Airlines	Flights
Seattle (SEA)	84.5%	0.4%	2	3,730
Denver (DEN)	81.2%	0.1%	4	3,034
Phoenix (PHX)	83.7%	0.4%	5	2,052
San Francisco (SFO)	64.7%	0.4%	2	1,744
Salt Lake City (SLC)	90.1%	1.0%	2	1,732
Los Angeles (LAX)	92.5%	0.2%	2	1,353
Las Vegas (LAS)	81.3%	0.2%	5	1,336
Chicago (ORD)	73.6%	1.2%	4	1,111
Portland (PDX)	91.1%	0.6%	2	1,067
San Diego (SAN)	79.0%	0.8%	3	1,033
Sacramento (SMF)	85.0%	0.2%	2	871
Dallas/Fort Worth (DFW)	78.6%	2.8%	1	817
Minneapolis (MSP)	86.4%	0.5%	1	774
San Jose (SJC)	86.4%	0.2%	2	645
Atlanta (ATL)	83.6%	1.3%	1	548
Oakland (OAK)	83.2%	0.0%	1	529
Burbank (BUR)	85.0%	0.5%	2	441
Santa Ana (SNA)	80.9%	0.5%	2	388
Spokane (GEG)	91.5%	0.3%	1	306
Chicago (MDW)	84.9%	0.0%	1	86

Airliner parked at a terminal gate — Photo: Depositphotos (licensed stock, illustrative only). Credits

Sources & data dates

Source: U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
Period: September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
Data through: August 2026
Processed: 2026-11-03
Scope: Scheduled nonstop domestic departures from Boise, ID (BOI) by airlines that report to the DOT.
Method: Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.

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