Southwest Wyoming Regional (RKS) Delays and On-Time Departures
Rock Springs, WY · ranked 109th of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, Rock Springs (RKS) had 728 scheduled departures and 82.4% of them left on time (US average 77.4%).
That ranks 109th of 333 US airports tracked on this site, with 0.3% of departures cancelled.
Over 24 months, Saturday was the most reliable day (88% on time) and January the worst month (81%).
Best time of day to fly out of Rock Springs (RKS)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 90.1% | 0.6% | 729 |
| 9am–10am | Limited data | 2 | |
| 10am–11am | Limited data | 29 | |
| 1pm–2pm | 79.1% | 1.0% | 208 |
| 2pm–3pm | 77.4% | 0.4% | 489 |
Airlines at RKS ranked by on-time departures
Last 12 months. Airlines with fewer than 30 departures are marked “limited data”.
| Airline | On-time departures | On-time arrivals | Cancelled | Departures |
|---|---|---|---|---|
| SkyWest Airlines | 82.4% | 81.8% | 0.3% | 728 |
80%+ good 70–79.9% fair <70% poor
Best day to fly out of RKS
On-time departures by day, 24 months.
Best month to fly out of RKS
On-time departures by month, 24 months.
Holiday travel at Rock Springs (RKS)
On-time departures during holiday periods compared with all other days, last 24 months.
| Period | On-time departures | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 26 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 86.7% | +2.2 pts | 0.0% | 60 |
| Summer peak (Jun 15 - Aug 15) | 82.5% | -2.0 pts | 0.8% | 248 |
| All other days | 84.5% | — | 0.5% | 1,123 |
Monthly on-time departure trend at RKS
On-time departure % each month, with the 12-month US average for reference.
Routes from Rock Springs (RKS)
Every route from RKS with its own page, by number of flights (last 12 months, on-time arrivals).
| To | On time | Cancelled | Flights |
|---|---|---|---|
| RKS → Denver (DEN) | 81.8% | 0.3% | 728 |