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Route Reliability

Washington → Kansas City

IAD–MCI · 926 miles · Washington Dulles International Airport to Kansas City International Airport

80
Pretty Reliable
WanderNerd Reliability Score
78%
Arrive within 15 minutes
12 min
Average arrival delay
1.0%
Cancelled
714
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 78% of the time across 714 flights. No comparison to make.

What the data says

The 12–3 PM departure wins.

IAD–MCI flights departing between 12–3 PM arrived on time 82% of the time, versus 73% between 6–9 PM.

Friday is doing you no favors.

IAD–MCI flights arrived on time 83% of the time on Tuesdays. On Fridays: 70%.

Ticking up lately.

IAD–MCI flights arrived on time 84% of the time over the last three months in the data, compared with 78% 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
  • Mon78%(102 flights)
  • Tue83%(96 flights)
  • Wed79%(102 flights)
  • Thu78%(103 flights)
  • Fri70%(102 flights)
  • Sat77%(99 flights)
  • Sun81%(101 flights)
On-time by departure window
  • 12–3 PM82%(349 flights)
  • 3–6 PM75%(290 flights)
  • 6–9 PM73%(66 flights)
On-time trend by month
81%
May

Jun 54% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202554%57
July 202560%60
August 202579%58
September 202582%56
October 202586%62
November 202590%58
December 202564%61
January 202684%56
February 202687%55
March 202683%60
April 202687%60
May 202681%62

Same trip, other airports

Keep nerding

Based on 714 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.