Idaho Falls (IDA) to Denver (DEN): On-Time Performance
Data through July 2026
When you fly IDA to DEN matters as much as anything else about the booking: the route swung from 91% on-time in November 2025 to just 57% in July 2025. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 69%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 19 min
- completed flights
- Cancelled
- 0.9%
- Flights/day
- 4.7
- last 12 months
- Duration
- 1h 51m
- scheduled
- Distance
- 458 mi
Best airline from IDA to DEN
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 79% | 18 min | 0.9% | 3,150 |
| United Airlines | 77% | 26 min | 0.0% | 215 |
Monthly on-time trend
Best time to fly from IDA to DEN
Aim for departures around 5 a.m. (89% on-time); avoid 4 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Mondaybest | 81% | 17 min |
| Tuesday | 76% | 22 min |
| Wednesday | 80% | 20 min |
| Thursday | 77% | 18 min |
| Friday | 79% | 21 min |
| Saturday | 79% | 19 min |
| Sunday | 80% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft25%
- Airline operations40%
- National airspace system25%
- Weather11%
Frequently asked questions
- How often are flights from IDA to DEN delayed?
- 21% of IDA–DEN 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 19 minutes.
- Which airline is most reliable from IDA to DEN?
- SkyWest Airlines has the best on-time record on this route at 79%, based on 3,150 flights. 2 airlines flew IDA–DEN frequently enough to compare in this period.
- What is the best time of day to fly from IDA to DEN?
- Departures around 5 a.m. have the best record (89% on-time), while departures around 4 p.m. have the worst (56%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IDA to DEN?
- The scheduled IDA–DEN flight time averages 1h 51m over 458 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are IDA to DEN flights cancelled?
- 0.9% 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 IDA to DEN?
- July 2025 was the roughest month in this dataset, with only 57% of arrivals on time. The best was November 2025 at 91%. If your dates are flexible, that 33-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.