Atlanta (ATL) to Boise (BOI): On-Time Performance
Data through July 2026
When you fly ATL to BOI matters as much as anything else about the booking: the route swung from 96% on-time in February 2026 to just 62% in March 2026. Across the full period the route averages 81% on-time against a national 78%. Morning departures also hold up better than evening ones (88% vs 65%), which matters most in the rough months.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 11 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 1.5
- last 12 months
- Duration
- 4h 29m
- scheduled
- Distance
- 1,838 mi
Monthly on-time trend
Best time to fly from ATL to BOI
Aim for departures around 11 a.m. (94% on-time); avoid 7 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 12 min |
| Tuesday | 83% | 10 min |
| Wednesday | 80% | 12 min |
| Thursday | 82% | 9 min |
| Friday | 83% | 11 min |
| Saturdaybest | 85% | 9 min |
| Sunday | 74% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft28%
- Airline operations48%
- National airspace system22%
- Weather3%
Frequently asked questions
- How often are flights from ATL to BOI delayed?
- 19% of ATL–BOI flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 11 minutes.
- What is the best time of day to fly from ATL to BOI?
- Departures around 11 a.m. have the best record (94% on-time), while departures around 7 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ATL to BOI?
- The scheduled ATL–BOI flight time averages 4h 29m over 1,838 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are ATL to BOI flights cancelled?
- 1.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from ATL to BOI?
- March 2026 was the roughest month in this dataset, with only 62% of arrivals on time. The best was February 2026 at 96%. If your dates are flexible, that 34-point gap is worth planning around.
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Based on 1,122 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.