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Route Reliability

Tucson → Denver

TUS–DEN · 639 miles · Tucson International Airport to Denver International Airport

87
Pretty Reliable
WanderNerd Reliability Score
83%
Arrive within 15 minutes
6 min
Average arrival delay
0.8%
Cancelled
2,796
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.United Airlines85%1,483 flights
  2. 2.Southwest Airlines81%1,209 flights
  3. 3.Frontier Airlines78%104 flights

What the data says

Morning flights do better here.

TUS–DEN flights departing between 3–6 AM arrived on time 95% of the time, versus 36% between 6–9 PM.

Saturday comes out ahead.

A small edge: 86% on time on Saturdays against 81% on Thursdays.

United Airlines has a slight edge here.

United Airlines arrived on time 85% of the time on this route; Frontier Airlines managed 78%.

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
  • Mon83%(411 flights)
  • Tue82%(371 flights)
  • Wed84%(372 flights)
  • Thu81%(409 flights)
  • Fri82%(413 flights)
  • Sat86%(345 flights)
  • Sun83%(449 flights)
On-time by departure window
  • 3–6 AM95%(166 flights)
  • 6–9 AM93%(754 flights)
  • 9 AM–12 PM86%(677 flights)
  • 12–3 PM75%(603 flights)
  • 3–6 PM71%(556 flights)
  • 6–9 PM36%(14 flights)
On-time trend by month
83%
May

Jun 69% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%185
July 202570%161
August 202573%189
September 202583%191
October 202587%255
November 202591%256
December 202583%269
January 202691%253
February 202684%244
March 202681%275
April 202688%260
May 202683%232

Keep nerding

Based on 2,796 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.