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Route Reliability

Washington → Columbus

IAD–CMH · 299 miles · Washington Dulles International Airport to John Glenn Columbus International Airport

83
Pretty Reliable
WanderNerd Reliability Score
81%
Arrive within 15 minutes
7 min
Average arrival delay
1.3%
Cancelled
1,502
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 81% of the time across 1,502 flights. No comparison to make.

What the data says

Morning-you made the right choice.

IAD–CMH flights departing between 6–9 AM arrived on time 88% of the time, versus 73% between 3–6 PM.

Sunday scaries are real for this one.

IAD–CMH flights arrived on time 86% of the time on Tuesdays. On Sundays: 76%.

Ticking up lately.

IAD–CMH flights arrived on time 85% of the time over the last three months in the data, compared with 80% 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%(209 flights)
  • Tue86%(215 flights)
  • Wed84%(210 flights)
  • Thu84%(210 flights)
  • Fri77%(211 flights)
  • Sat84%(211 flights)
  • Sun76%(213 flights)
On-time by departure window
  • 6–9 AM88%(357 flights)
  • 12–3 PM84%(363 flights)
  • 3–6 PM73%(406 flights)
  • 9 PM–12 AM81%(353 flights)
On-time trend by month
86%
May

Jun 66% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%142
July 202566%118
August 202588%123
September 202584%142
October 202584%124
November 202592%115
December 202581%122
January 202682%118
February 202678%109
March 202675%123
April 202695%120
May 202686%123

Same trip, other airports

Keep nerding

Based on 1,502 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.