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Route Reliability

MDT → Washington

MDT–IAD · 93 miles · MDT Airport to Washington Dulles International Airport

85
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
8 min
Average arrival delay
1.6%
Cancelled
1,092
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 84% of the time across 1,092 flights. No comparison to make.

What the data says

Mornings have a slight edge.

Departures between 9 AM–12 PM arrived on time 85% of the time, against 79% between 3–6 PM.

Thursday is the weak spot.

MDT–IAD flights arrived on time 89% of the time on Saturdays. On Thursdays: 80%.

Trending in the right direction.

MDT–IAD flights arrived on time 90% of the time over the last three months in the data, compared with 71% 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
  • Mon81%(155 flights)
  • Tue82%(152 flights)
  • Wed87%(153 flights)
  • Thu80%(166 flights)
  • Fri85%(164 flights)
  • Sat89%(133 flights)
  • Sun83%(151 flights)
On-time by departure window
  • 6–9 AM84%(343 flights)
  • 9 AM–12 PM85%(309 flights)
  • 12–3 PM83%(312 flights)
  • 3–6 PM79%(34 flights)
  • 6–9 PM82%(76 flights)
On-time trend by month
91%
May

Jun 80% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%112
July 202582%96
August 202586%93
September 202595%78
October 202596%92
November 202583%78
December 202561%87
January 202672%82
February 202680%79
March 202686%92
April 202693%90
May 202691%95

Keep nerding

Based on 1,092 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.