Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 3646 · United Airlines

Washington → Columbus (IAD–CMH)97% of its flights flew this route. The rest (ORD–CHS, ORD–SAV) are included in these numbers.

78
Usually Fine
WanderNerd Reliability Score
82%
Arrive within 15 minutes
8 min
Average arrival delay
2.8%
Cancelled
10 min early
Median arrival delay

Based on 362 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

UA 3646 departing between 9 AM–12 PM arrived on time 91% of the time, versus 82% between 9 PM–12 AM.

Sunday scaries are real for this one.

UA 3646 arrived on time 88% of the time on Fridays and just 72% on Sundays. That gap is worth planning around.

The breakdown

On-time by weekday
  • Mon82%(49 flights)
  • Tue85%(52 flights)
  • Wed76%(50 flights)
  • Thu84%(50 flights)
  • Fri88%(51 flights)
  • Sat84%(50 flights)
  • Sun72%(50 flights)
On-time by departure window
  • 9 AM–12 PM91%(11 flights)
  • 6–9 PM—(1 flights)
  • 9 PM–12 AM82%(340 flights)
On-time trend by month
84%
May

Jun 63% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%30
July 202574%27
August 202590%31
September 202577%30
October 202590%31
November 202589%27
December 202587%30
January 202683%29
February 202682%27
March 202666%29
April 202693%30
May 202684%31
Departures on time
83%
Diverted
0%
Flights flown
352
Months covered
12

Same route, other flights

Keep nerding

Based on 362 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.