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Flight Reliability

UA 4244 · United Airlines

MDT → Washington (MDT–IAD)82% of its flights flew this route. The rest (HSV–IAH, IAH–BTR) are included in these numbers.

88
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
6 min
Average arrival delay
1.1%
Cancelled
10 min early
Median arrival delay

Based on 359 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

UA 4244 departing between 6–9 PM arrived on time 94% of the time, versus 71% between 3–6 PM.

Tuesdays have been rough.

UA 4244 arrived on time 92% of the time on Wednesdays and just 77% on Tuesdays. That gap is worth planning around.

A bit ahead of the United Airlines network.

UA 4244 arrived on time 84% of the time, versus 79% across the United Airlines network.

Trending in the right direction.

UA 4244 arrived on time 93% of the time over the last three months in the data, compared with 72% in the three months before that.

The breakdown

On-time by weekday
  • Mon80%(51 flights)
  • Tue77%(51 flights)
  • Wed92%(52 flights)
  • Thu82%(50 flights)
  • Fri87%(52 flights)
  • Sat88%(48 flights)
  • Sun84%(51 flights)
On-time by departure window
  • 6–9 AM86%(290 flights)
  • 9 AM–12 PM—(1 flights)
  • 3–6 PM71%(48 flights)
  • 6–9 PM94%(16 flights)
On-time trend by month
97%
May

Jun 87% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202587%31
August 202590%30
September 202587%30
October 202590%31
November 202569%26
December 202576%29
January 202672%29
February 202668%28
March 202690%30
April 202693%30
May 202697%31
Departures on time
88%
Diverted
0%
Flights flown
355
Months covered
12

Same route, other flights

Keep nerding

Based on 359 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.