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Route Reliability

Chicago → Denver

ORD–DEN · 888 miles · Chicago O'Hare International Airport to Denver International Airport

75
Usually Fine
WanderNerd Reliability Score
75%
Arrive within 15 minutes
13 min
Average arrival delay
1.2%
Cancelled
6,198
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.United Airlines78%3,701 flights
  2. 2.Frontier Airlines75%331 flights
  3. 3.Southwest Airlines73%570 flights
  4. 4.American Airlines67%1,596 flights

What the data says

Morning-you made the right choice.

ORD–DEN flights departing between 3–6 AM arrived on time 93% of the time, versus 58% between 6–9 PM.

Saturday has been the better bet.

A small edge: 78% on time on Saturdays against 72% on Sundays.

United Airlines runs this route best.

United Airlines arrived on time 78% of the time on this route; American Airlines managed 67%.

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
  • Mon73%(883 flights)
  • Tue78%(853 flights)
  • Wed76%(857 flights)
  • Thu74%(888 flights)
  • Fri73%(889 flights)
  • Sat78%(827 flights)
  • Sun72%(912 flights)
On-time by departure window
  • 12–3 AM—(2 flights)
  • 3–6 AM93%(198 flights)
  • 6–9 AM86%(1376 flights)
  • 9 AM–12 PM79%(865 flights)
  • 12–3 PM80%(1284 flights)
  • 3–6 PM66%(821 flights)
  • 6–9 PM58%(1145 flights)
  • 9 PM–12 AM68%(418 flights)
On-time trend by month
79%
May

Jun 71% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202571%562
July 202567%562
August 202574%584
September 202581%602
October 202579%615
November 202576%408
December 202566%412
January 202675%393
February 202680%432
March 202672%472
April 202677%484
May 202679%583

Same trip, other airports

Keep nerding

Based on 6,198 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.