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Airport Reliability

RIW · Riverton/Lander

Riverton/Lander, WY (RIW)

85%
Departures within 15 minutes
16 min
Average departure delay
82%
Arrivals within 15 minutes
0.4%
Departures cancelled

Based on 729 departures and 728 arrivals. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 3–6 AM arrived on time 87% of the time, against 80% between 12–3 PM.

Friday is doing you no favors.

Departures from RIW arrived on time 88% of the time on Wednesdays. On Fridays: 80%.

Slipping a little lately.

Departures from RIW arrived on time 81% of the time over the last three months in the data, compared with 87% in the three months before that.

When RIW gets messy

On-time by departure window
  • 3–6 AM87%(361 flights)
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM80%(358 flights)
On-time by weekday
  • Mon85%(103 flights)
  • Tue85%(103 flights)
  • Wed88%(102 flights)
  • Thu80%(102 flights)
  • Fri80%(102 flights)
  • Sat81%(103 flights)
  • Sun85%(105 flights)
On-time trend by month
83%
May

Jun 78% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202578%60
July 202572%60
August 202583%59
September 202598%59
October 202579%62
November 202586%59
December 202587%62
January 202687%62
February 202687%55
March 202681%62
April 202680%60
May 202683%60

Airlines departing RIW

Busiest routes from RIW

Based on 729 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.