Rock Springs (RKS) to Denver (DEN): On-Time Performance
Data through July 2026
When you fly RKS to DEN matters as much as anything else about the booking: the route swung from 97% on-time in November 2025 to just 73% in July 2026. Across the full period the route averages 82% on-time against a national 78%.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 30 min
- completed flights
- Cancelled
- 0.6%
- Flights/day
- 2.0
- last 12 months
- Duration
- 1h 21m
- scheduled
- Distance
- 260 mi
Monthly on-time trend
Best time to fly from RKS to DEN
Aim for departures around 5 a.m. (88% on-time); avoid 1 p.m. departures (71%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 30 min |
| Tuesday | 79% | 46 min |
| Wednesday | 81% | 28 min |
| Thursday | 81% | 32 min |
| Friday | 84% | 28 min |
| Saturdaybest | 88% | 22 min |
| Sunday | 83% | 25 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 operations59%
- National airspace system12%
- Weather6%
Frequently asked questions
- How often are flights from RKS to DEN delayed?
- 18% of RKS–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 30 minutes.
- What is the best time of day to fly from RKS to DEN?
- Departures around 5 a.m. have the best record (88% on-time), while departures around 1 p.m. have the worst (71%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from RKS to DEN?
- The scheduled RKS–DEN flight time averages 1h 21m over 260 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are RKS 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 RKS to DEN?
- July 2026 was the roughest month in this dataset, with only 73% of arrivals on time. The best was November 2025 at 97%. If your dates are flexible, that 24-point gap is worth planning around.
Explore related pages
Other ways to fly to Denver (DEN)
Related guides
Based on 1,519 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.