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Flight Reliability

UA 2739 · United Airlines

Washington → Atlanta (IAD–ATL)98% of its flights flew this route. The rest (DEN–DAY, LAX–LAS) are included in these numbers.

96
Nerd Approved
WanderNerd Reliability Score
90%
Arrive within 15 minutes
4 min early
Average arrival delay
0.4%
Cancelled
14 min early
Median arrival delay

Based on 245 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

UA 2739 departing between 6–9 AM arrived on time 91% of the time, versus 60% between 9 AM–12 PM.

Tuesdays have been rough.

UA 2739 arrived on time 98% of the time on Thursdays and just 79% on Tuesdays. That gap is worth planning around.

Better than the IAD–ATL route average.

UA 2739 arrived on time 90% of the time, versus 79% across the IAD–ATL route.

Better than the United Airlines network average.

UA 2739 arrived on time 90% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon85%(34 flights)
  • Tue79%(28 flights)
  • Wed93%(27 flights)
  • Thu98%(40 flights)
  • Fri90%(41 flights)
  • Sat91%(35 flights)
  • Sun90%(39 flights)
On-time by departure window
  • 6–9 AM91%(231 flights)
  • 9 AM–12 PM60%(10 flights)
  • 3–6 PM—(2 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
95%
May

Aug 100% → May 95% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 2025100%13
September 202590%30
October 202584%31
November 202590%29
December 202580%25
January 202690%20
February 202684%19
March 202694%31
April 202696%26
May 202695%20
Departures on time
93%
Diverted
0%
Flights flown
244
Months covered
10

Same route, other flights

Keep nerding

Based on 245 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.