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Route Reliability

Raleigh–Durham → Denver

RDU–DEN · 1,436 miles · Raleigh–Durham International Airport to Denver International Airport

82
Pretty Reliable
WanderNerd Reliability Score
79%
Arrive within 15 minutes
6 min
Average arrival delay
0.9%
Cancelled
1,795
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines86%806 flights
  2. 2.Southwest Airlines74%709 flights
  3. 3.Frontier Airlines72%280 flights

What the data says

Morning-you made the right choice.

RDU–DEN flights departing between 6–9 AM arrived on time 93% of the time, versus 58% between 6–9 PM.

Friday is doing you no favors.

RDU–DEN flights arrived on time 84% of the time on Wednesdays. On Fridays: 74%.

United Airlines runs this route best.

United Airlines arrived on time 86% of the time on this route; Frontier Airlines managed 72%.

Ticking up lately.

RDU–DEN flights arrived on time 86% of the time over the last three months in the data, compared with 82% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon74%(270 flights)
  • Tue83%(242 flights)
  • Wed84%(231 flights)
  • Thu79%(260 flights)
  • Fri74%(268 flights)
  • Sat82%(240 flights)
  • Sun81%(260 flights)
On-time by departure window
  • 3–6 AM93%(153 flights)
  • 6–9 AM93%(565 flights)
  • 9 AM–12 PM93%(83 flights)
  • 12–3 PM92%(39 flights)
  • 3–6 PM69%(686 flights)
  • 6–9 PM58%(228 flights)
  • 9 PM–12 AM82%(17 flights)
On-time trend by month
89%
May

Jun 66% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%175
July 202567%179
August 202571%159
September 202581%133
October 202585%136
November 202586%138
December 202571%146
January 202688%130
February 202688%126
March 202685%148
April 202684%147
May 202689%154

Keep nerding

Based on 1,795 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.