Austin (AUS) to Denver (DEN): On-Time Performance
Data through July 2026
When you fly AUS to DEN matters as much as anything else about the booking: the route swung from 89% on-time in September 2024 to just 64% 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 (89% vs 63%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 0.6%
- Flights/day
- 15
- last 12 months
- Duration
- 2h 22m
- scheduled
- Distance
- 775 mi
Best airline from AUS to DEN
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 82% | 13 min | 0.8% | 4,002 |
| Frontier Airlines | 81% | 16 min | 0.7% | 1,059 |
| SkyWest Airlines | 80% | 16 min | 0.5% | 552 |
| Southwest Airlines | 77% | 14 min | 0.5% | 4,993 |
Monthly on-time trend
Best time to fly from AUS to DEN
Aim for departures around 5 a.m. (94% on-time); avoid 5 p.m. departures (61%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 13 min |
| Tuesday | 82% | 13 min |
| Wednesday | 80% | 14 min |
| Thursday | 78% | 15 min |
| Friday | 78% | 15 min |
| Saturdaybest | 82% | 12 min |
| Sunday | 77% | 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 aircraft41%
- Airline operations26%
- National airspace system29%
- Weather4%
Frequently asked questions
- How often are flights from AUS to DEN delayed?
- 21% of AUS–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 14 minutes.
- Which airline is most reliable from AUS to DEN?
- United Airlines has the best on-time record on this route at 82%, based on 4,002 flights. 4 airlines flew AUS–DEN frequently enough to compare in this period.
- What is the best time of day to fly from AUS to DEN?
- Departures around 5 a.m. have the best record (94% on-time), while departures around 5 p.m. have the worst (61%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from AUS to DEN?
- The scheduled AUS–DEN flight time averages 2h 22m over 775 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are AUS to DEN flights cancelled?
- 0.6% 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 AUS to DEN?
- July 2025 was the roughest month in this dataset, with only 64% of arrivals on time. The best was September 2024 at 89%. If your dates are flexible, that 25-point gap is worth planning around.
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Based on 10,606 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.