Denver (DEN) to Idaho Falls (IDA): On-Time Performance
Data through July 2026
When you fly DEN to IDA matters as much as anything else about the booking: the route swung from 92% on-time in September 2024 to just 61% in June 2025. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (83% vs 72%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 16 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 4.7
- last 12 months
- Duration
- 1h 46m
- scheduled
- Distance
- 458 mi
Best airline from DEN to IDA
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 80% | 14 min | 0.0% | 215 |
| SkyWest Airlines | 79% | 16 min | 0.8% | 3,150 |
Monthly on-time trend
Best time to fly from DEN to IDA
Aim for departures around 8 a.m. (87% on-time); avoid 9 p.m. departures (70%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 16 min |
| Tuesday | 79% | 16 min |
| Wednesday | 78% | 14 min |
| Thursday | 76% | 16 min |
| Friday | 79% | 19 min |
| Saturdaybest | 81% | 14 min |
| Sunday | 80% | 19 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft38%
- Airline operations35%
- National airspace system16%
- Weather11%
Frequently asked questions
- How often are flights from DEN to IDA delayed?
- 21% of DEN–IDA 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 16 minutes.
- Which airline is most reliable from DEN to IDA?
- United Airlines has the best on-time record on this route at 80%, based on 215 flights. 2 airlines flew DEN–IDA frequently enough to compare in this period.
- What is the best time of day to fly from DEN to IDA?
- Departures around 8 a.m. have the best record (87% on-time), while departures around 9 p.m. have the worst (70%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DEN to IDA?
- The scheduled DEN–IDA flight time averages 1h 46m over 458 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are DEN to IDA flights cancelled?
- 0.7% 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 DEN to IDA?
- June 2025 was the roughest month in this dataset, with only 61% of arrivals on time. The best was September 2024 at 92%. If your dates are flexible, that 30-point gap is worth planning around.
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Based on 3,395 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.