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Flight Reliability

UA 3981 · United Airlines

Washington → Savannah (IAD–SAV)87% of its flights flew this route. The rest (BHM–IAH, GSP–IAD) are included in these numbers.

86
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
6 min
Average arrival delay
1.2%
Cancelled
11 min early
Median arrival delay

Based on 249 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

UA 3981 departing between 6–9 AM arrived on time 97% of the time, versus 82% between 3–6 PM.

Friday is doing you no favors.

UA 3981 arrived on time 92% of the time on Thursdays and just 72% on Fridays. That gap is worth planning around.

A bit ahead of the United Airlines network.

UA 3981 arrived on time 84% of the time, versus 79% across the United Airlines network.

Trending in the right direction.

UA 3981 arrived on time 86% of the time over the last three months in the data, compared with 77% in the three months before that.

The breakdown

On-time by weekday
  • Mon88%(34 flights)
  • Tue80%(35 flights)
  • Wed83%(35 flights)
  • Thu92%(36 flights)
  • Fri72%(36 flights)
  • Sat91%(34 flights)
  • Sun83%(35 flights)
On-time by departure window
  • 6–9 AM97%(31 flights)
  • 12–3 PM—(1 flights)
  • 3–6 PM82%(213 flights)
On-time trend by month
87%
May

Oct 94% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
October 202594%31
November 202590%30
December 202574%31
January 202671%28
February 202686%28
March 202683%30
April 202687%30
May 202687%31
Departures on time
84%
Diverted
0.4%
Flights flown
245
Months covered
9

Same route, other flights

Keep nerding

Based on 249 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.