Airports › Boise (BOI) › January 2026
Airport month · January 2026
Boise Air Terminal in January 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 January 2026, reporting carriers scheduled 1,910 domestic departures from Boise Air Terminal (BOI). 87.2% left less than 15 minutes late and 85.1% reached their destination on time; 0.8% were cancelled.
Nationally that month, 75.6% of flights departed on time and 75.3% arrived on time, so BOI departures were 11.6 points above the national departure figure.
A year earlier, in January 2025, the airport had 1,839 departures with 86.7% leaving on time: a change of +0.5 points, with flights up 4%.
Flights arriving at BOI that month were on time 81.7% of the time (1,911 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 41%, late-arriving aircraft 34% and national aviation system 19%.
- On time 85.1%
- Arrived 15+ minutes late 13.8%
- Cancelled 0.8%
- Diverted 0.3%
January 2026 against a year earlier, the airport's year and the nation
| Measure | Jan 2026 | Jan 2025 | BOI, 12 months to Jul 2026 | All reported flights, Jan 2026 |
|---|---|---|---|---|
| Departed on time | 87.2% | 86.7% | 83.9% | 75.6% |
| Arrived on time | 85.1% | 85.6% | 82.9% | 75.3% |
| Cancelled | 0.8% | 0.5% | 0.5% | 4.7% |
| Average departure delay (late minutes only) | 10.3 min | 8.1 min | 12.2 min | 16.7 min |
| Scheduled departures a day | 64 | 61 | 65 | 18,133 |
| Scheduled departures | 1,910 | 1,839 | 23,701 | 544,003 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| OO SkyWest Airlines | 836 | 44% | 83.1% | 1.5 min | 0.6% |
| WN Southwest Airlines | 420 | 22% | 89.8% | -5.7 min | 0.0% |
| AS Alaska Airlines | 269 | 14% | 89.2% | -3.1 min | 0.0% |
| DL Delta Air Lines | 179 | 9% | 82.7% | 0.0 min | 2.2% |
| AA American Airlines | 76 | 4% | 75.0% | 6.3 min | 9.2% |
| UA United Airlines | 62 | 3% | 90.3% | 3.4 min | 0.0% |
| MQ Envoy Air | 35 | 2% | 65.7% | 15.1 min | 0.0% |
| G4 Allegiant Air | 21 | 1% | 90.5% | 29.3 min | 0.0% |
| F9 Frontier Airlines | 12 | 1% | 91.7% | -11.5 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| BOI–SEA | Boise to Seattle | 292 | 83.2% | -1.0 min | 0.3% |
| BOI–DEN | Boise to Denver | 255 | 90.2% | 2.2 min | 0.0% |
| BOI–PHX | Boise to Phoenix | 172 | 82.6% | -0.5 min | 0.0% |
| BOI–SFO | Boise to San Francisco | 151 | 80.1% | 3.2 min | 1.3% |
| BOI–SLC | Boise to Salt Lake City | 124 | 83.1% | -1.7 min | 1.6% |
| BOI–LAS | Boise to Las Vegas | 116 | 90.5% | 2.4 min | 0.0% |
| BOI–PDX | Boise to Portland | 103 | 93.2% | -5.3 min | 0.0% |
| BOI–ORD | Boise to Chicago | 98 | 78.6% | 4.1 min | 1.0% |
| BOI–LAX | Boise to Los Angeles | 96 | 89.6% | -3.2 min | 0.0% |
| BOI–SAN | Boise to San Diego | 73 | 71.2% | 9.3 min | 0.0% |
| BOI–SMF | Boise to Sacramento | 67 | 89.6% | -6.7 min | 0.0% |
| BOI–DFW | Boise to Dallas/Fort Worth | 62 | 74.2% | 6.6 min | 11.3% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left BOI on time in January 2026?
87.2% of 1,910 scheduled domestic departures left less than 15 minutes late, and 85.1% reached their destination on time. The national figures that month were 75.6% and 75.3%.
How does that compare with a year earlier?
In January 2025, 86.7% of 1,839 departures left on time and 0.5% were cancelled, against 87.2% and 0.8% in January 2026.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for January 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.