Sioux Falls (FSD) to Denver (DEN): On-Time Performance
Data through May 2026
The calendar drives reliability on FSD–DEN. February 2026 flights landed on schedule 91% of the time, but June 2025 dropped to 64% — a gap of 27 points. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (81% vs 65%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 19 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 5.0
- last 12 months
- Duration
- 1h 55m
- scheduled
- Distance
- 483 mi
Best airline from FSD to DEN
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 82% | 17 min | 1.1% | 2,385 |
| United Airlines | 70% | 20 min | 1.0% | 778 |
| Frontier Airlines | 70% | 29 min | 1.3% | 388 |
Monthly on-time trend
Best time to fly from FSD to DEN
Aim for departures around 6 a.m. (91% on-time); avoid 6 p.m. departures (48%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Mondaybest | 80% | 16 min |
| Tuesday | 79% | 18 min |
| Wednesday | 78% | 13 min |
| Thursday | 77% | 19 min |
| Friday | 76% | 21 min |
| Saturday | 78% | 18 min |
| Sunday | 78% | 29 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft23%
- Airline operations35%
- National airspace system31%
- Weather11%
Frequently asked questions
- How often are flights from FSD to DEN delayed?
- 22% of FSD–DEN flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 19 minutes.
- Which airline is most reliable from FSD to DEN?
- SkyWest Airlines has the best on-time record on this route at 82%, based on 2,385 flights. 3 airlines flew FSD–DEN frequently enough to compare in this period.
- What is the best time of day to fly from FSD to DEN?
- Departures around 6 a.m. have the best record (91% on-time), while departures around 6 p.m. have the worst (48%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from FSD to DEN?
- The scheduled FSD–DEN flight time averages 1h 55m over 483 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are FSD to DEN flights cancelled?
- 1.1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from FSD to DEN?
- June 2025 was the roughest month in this dataset, with only 64% of arrivals on time. The best was February 2026 at 91%. If your dates are flexible, that 27-point gap is worth planning around.
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Based on 3,551 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.