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Route Reliability

Chicago → Denver

MDW–DEN · 895 miles · Chicago Midway International Airport to Denver International Airport

76
Usually Fine
WanderNerd Reliability Score
74%
Arrive within 15 minutes
11 min
Average arrival delay
1.2%
Cancelled
2,392
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.Southwest Airlines74%2,279 flights
  2. 2.Frontier Airlines67%113 flights

What the data says

Morning flights do better here.

MDW–DEN flights departing between 3–6 AM arrived on time 92% of the time, versus 56% between 3–6 PM.

Monday is the weak spot.

MDW–DEN flights arrived on time 81% of the time on Wednesdays. On Mondays: 70%.

Southwest Airlines has a slight edge here.

Southwest Airlines arrived on time 74% of the time on this route; Frontier Airlines managed 67%.

Flights on this route

The breakdown

On-time by weekday
  • Mon70%(373 flights)
  • Tue76%(315 flights)
  • Wed81%(307 flights)
  • Thu72%(355 flights)
  • Fri73%(374 flights)
  • Sat75%(258 flights)
  • Sun72%(377 flights)
On-time by departure window
  • 3–6 AM92%(139 flights)
  • 6–9 AM89%(381 flights)
  • 9 AM–12 PM86%(429 flights)
  • 12–3 PM78%(449 flights)
  • 3–6 PM56%(469 flights)
  • 6–9 PM61%(308 flights)
  • 9 PM–12 AM58%(184 flights)
On-time trend by month
77%
May

Jun 66% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%275
July 202564%295
August 202575%222
September 202586%202
October 202582%212
November 202583%177
December 202561%195
January 202681%158
February 202680%138
March 202668%164
April 202674%159
May 202677%162

Same trip, other airports

Keep nerding

Based on 2,392 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.