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Flight Reliability

UA 632 · United Airlines

Atlanta → Washington (ATL–IAD)84% of its flights flew this route. The rest (IAD–BDL, IAH–JAX) are included in these numbers.

92
Nerd Approved
WanderNerd Reliability Score
87%
Arrive within 15 minutes
0 min
Average arrival delay
0.8%
Cancelled
8 min early
Median arrival delay

Based on 390 historical flights. Data through May 2026.

What the data says

12–3 PM has a slight edge.

Departures between 12–3 PM arrived on time 92% of the time, against 86% between 9 AM–12 PM.

Thursday is the weak spot.

UA 632 arrived on time 94% of the time on Tuesdays. On Thursdays: 81%.

Better than the ATL–IAD route average.

UA 632 arrived on time 87% of the time, versus 77% across the ATL–IAD route.

Better than the United Airlines network average.

UA 632 arrived on time 87% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon83%(54 flights)
  • Tue94%(49 flights)
  • Wed92%(48 flights)
  • Thu81%(59 flights)
  • Fri90%(61 flights)
  • Sat86%(55 flights)
  • Sun84%(61 flights)
On-time by departure window
  • 9 AM–12 PM86%(326 flights)
  • 12–3 PM92%(60 flights)
  • 6–9 PM—(1 flights)
On-time trend by month
83%
May

Jun 86% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%29
July 202571%31
August 202594%31
September 202597%30
October 202590%31
November 202576%29
December 202592%25
January 202675%20
February 202689%18
March 202684%31
April 202697%59
May 202683%53
Departures on time
90%
Diverted
0%
Flights flown
387
Months covered
12

Same route, other flights

Keep nerding

Based on 390 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.