Airports › Boise (BOI) › April 2026
Airport month · April 2026
Boise Air Terminal in April 2026
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In April 2026, reporting carriers scheduled 1,946 domestic departures from Boise Air Terminal (BOI). 84.9% left less than 15 minutes late and 83.9% reached their destination on time; 0.4% were cancelled.
Nationally that month, 79.1% of flights departed on time and 78.9% arrived on time, so BOI departures were 5.8 points above the national departure figure.
A year earlier, in April 2025, the airport had 1,927 departures with 87.8% leaving on time: a change of −2.9 points, with flights up 1%.
Flights arriving at BOI that month were on time 82.4% of the time (1,944 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 48%, late-arriving aircraft 27% and national aviation system 21%.
- On time 83.9%
- Arrived 15+ minutes late 15.7%
- Cancelled 0.4%
- Diverted 0.1%
April 2026 against a year earlier, the airport's year and the nation
| Measure | Apr 2026 | Apr 2025 | BOI, 12 months to Jul 2026 | All reported flights, Apr 2026 |
|---|---|---|---|---|
| Departed on time | 84.9% | 87.8% | 83.9% | 79.1% |
| Arrived on time | 83.9% | 85.2% | 82.9% | 78.9% |
| Cancelled | 0.4% | 0.0% | 0.5% | 0.9% |
| Average departure delay (late minutes only) | 12.2 min | 9.0 min | 12.2 min | 14.5 min |
| Scheduled departures a day | 65 | 64 | 65 | 19,931 |
| Scheduled departures | 1,946 | 1,927 | 23,701 | 597,919 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| OO SkyWest Airlines | 925 | 48% | 84.8% | 2.4 min | 0.3% |
| WN Southwest Airlines | 398 | 20% | 80.9% | 2.7 min | 0.0% |
| DL Delta Air Lines | 224 | 12% | 88.4% | 0.1 min | 0.4% |
| AS Alaska Airlines | 206 | 11% | 88.3% | -6.3 min | 1.0% |
| AA American Airlines | 84 | 4% | 67.9% | 8.3 min | 1.2% |
| UA United Airlines | 60 | 3% | 88.3% | 20.3 min | 0.0% |
| MQ Envoy Air | 30 | 2% | 76.7% | 11.0 min | 0.0% |
| G4 Allegiant Air | 13 | 1% | 69.2% | 21.5 min | 0.0% |
| F9 Frontier Airlines | 6 | 0% | 83.3% | -13.2 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| BOI–SEA | Boise to Seattle | 356 | 89.0% | -3.6 min | 0.3% |
| BOI–DEN | Boise to Denver | 248 | 82.7% | 6.4 min | 0.0% |
| BOI–SFO | Boise to San Francisco | 166 | 64.5% | 20.9 min | 1.2% |
| BOI–SLC | Boise to Salt Lake City | 150 | 89.3% | -6.0 min | 0.7% |
| BOI–PHX | Boise to Phoenix | 149 | 84.6% | 4.3 min | 0.0% |
| BOI–LAS | Boise to Las Vegas | 120 | 83.3% | 0.4 min | 0.0% |
| BOI–LAX | Boise to Los Angeles | 109 | 93.6% | -0.6 min | 0.0% |
| BOI–ORD | Boise to Chicago | 91 | 64.8% | 14.9 min | 1.1% |
| BOI–SAN | Boise to San Diego | 79 | 91.1% | -4.4 min | 0.0% |
| BOI–SMF | Boise to Sacramento | 63 | 82.5% | 1.5 min | 0.0% |
| BOI–DFW | Boise to Dallas/Fort Worth | 60 | 76.7% | -0.3 min | 1.7% |
| BOI–MSP | Boise to Minneapolis | 60 | 90.0% | -2.7 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left BOI on time in April 2026?
84.9% of 1,946 scheduled domestic departures left less than 15 minutes late, and 83.9% reached their destination on time. The national figures that month were 79.1% and 78.9%.
How does that compare with a year earlier?
In April 2025, 87.8% of 1,927 departures left on time and 0.0% were cancelled, against 84.9% and 0.4% in April 2026.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 2026; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for BOI · methodology · corrections.