Central Wyoming Regional (RIW) Delays and On-Time Departures
Riverton/Lander, WY · ranked 52nd of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
84.7% of the 729 flights scheduled to depart Riverton/Lander (RIW) in the last 12 months left on time, 7.3 points above the US average of 77.4%.
That ranks 52nd of 333 US airports tracked on this site, with 0.3% of departures cancelled.
Over 24 months, Monday was the most reliable day (89% on time) and April the worst month (81%).
Best time of day to fly out of Riverton/Lander (RIW)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 89.9% | 0.7% | 728 |
| 9am–10am | Limited data | 1 | |
| 11am–12pm | Limited data | 1 | |
| 1pm–2pm | 69.4% | 0.0% | 49 |
| 2pm–3pm | 82.4% | 0.4% | 679 |
Airlines at RIW 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 | 84.7% | 82.9% | 0.3% | 729 |
80%+ good 70–79.9% fair <70% poor
Best day to fly out of RIW
On-time departures by day, 24 months.
Best month to fly out of RIW
On-time departures by month, 24 months.
Holiday travel at Riverton/Lander (RIW)
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) | 90.0% | +3.7 pts | 0.0% | 60 |
| Summer peak (Jun 15 - Aug 15) | 81.7% | -4.6 pts | 0.8% | 248 |
| All other days | 86.3% | — | 0.5% | 1,124 |
Monthly on-time departure trend at RIW
On-time departure % each month, with the 12-month US average for reference.
Routes from Riverton/Lander (RIW)
Every route from RIW with its own page, by number of flights (last 12 months, on-time arrivals).
| To | On time | Cancelled | Flights |
|---|---|---|---|
| RIW → Denver (DEN) | 82.9% | 0.3% | 728 |